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MAX3344EEUE+T中文资料

General Description

The MAX3344E/MAX3345E USB transceivers convert logic-level signals to USB signals, and USB signals to logic-level signals. An internal 1.5k ?USB pullup resistor supports full-speed (12Mbps) USB operation. The MAX3344E/MAX3345E provide built-in ±15kV ESD-pro-tection circuitry on the USB I/O pins, D+ and D-, and V CC .The MAX3344E/MAX3345E operate with logic supply voltages as low as 1.65V, ensuring compatibility with low-voltage ASICs. The suspend mode lowers supply current to less than 40μA. An enumerate function allows devices to logically disconnect while plugged in. The MAX3344E/MAX3345E are fully compliant with USB specification 1.1, and full-speed operation under USB specification 2.0.

The MAX3344E/MAX3345E have a USB detect that mon-itors the USB bus for insertion and signals this event. The MAX3344E USB_DET threshold is between 3.6V (min)and 4V (max), while the MAX3345E USB_DET threshold is between 1V (min) and 2.8V (max).

The MAX3344E/MAX3345E are available in the miniature 4 ?4 UCSP?, as well as the small 16-pin TSSOP, and are specified over the extended temperature range,-40°C to +85°C.

Applications

Cell Phones PC Peripherals

Information Appliances Data Cradles PDAs

MP3 Players Digital Cameras

Features

?±15kV ESD Protection On D+ and D-

?Comply with USB Specification 1.1 (Full Speed 2.0)?Separate VP and VM Inputs/Outputs

?V L Down to 1.65V Allows Connection with Low-Voltage ASICs

?Enumerate Input—Allows USB Connection through Software ?

USB Detect Function

3.6V (min) to 4V (max)—MAX3344E 1V (min) to 2.8V (max)—MAX3345E

?Allow Single-Ended or Differential Logic I/O

?Internal Linear Regulator Allows Direct Powering from the USB

?Internal Pullup Resistor for Full-Speed Operation ?Three-State Outputs

?No Power-Supply Sequencing Required ?Driver Active in Suspend Mode

Available in Miniature Chip-Scale Package

MAX3344E/MAX3345E

±15kV ESD-Protected USB Transceivers

in UCSP with USB Detect

________________________________________________________________Maxim Integrated Products 1

Ordering Information

19-3171; Rev 0; 2/04

For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at

1-888-629-4642, or visit Maxim’s website at https://www.wendangku.net/doc/2b9720822.html,.

Pin Configurations appear at end of data sheet.UCSP is a trademark of Maxim Integrated Products, Inc.

Typical Operating Circuit

M A X 3344E /M A X 3345E

±15kV ESD-Protected USB Transceivers in UCSP with USB Detect

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V = 4V to 5.5V bypassed with 1μF to GND, GND = 0, V = 1.65V to 3.6V, ENUM = V , T = T to T , unless otherwise Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Note 1:External 23.7?resistors connected to D+ and D-.

(All voltages refer to GND, unless otherwise noted.)

Supply Voltage (V CC )...............................................-0.3V to +6V Output of Internal Regulator (VTRM)..........-0.3V to (V CC + 0.3V)Input Voltage (D+, D-)..............................................-0.3V to +6V System Supply Voltage (V L ).....................................-0.3V to +6V RCV, SUSP, VMO, MODE, VPO, OE , VMI,

VPI, USB_DET, ENUM...............................-0.3V to (V L + 0.3V)Short-Circuit Current (D+, D-) to V CC or

GND (Note 1).........................................................Continuous Maximum Continuous Current (all other pins)..................±15mA Continuous Power Dissipation (T A = +70°C)

16-Pin TSSOP (derate 9.4mW/°C above +70°C)...754mW (U16-2)4 ?4 UCSP (derate 8.2mW/°C above +70°C)...659mW (B16-1)Operating Temperature Range ...........................-40°C to +85°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°C Bump Temperature (soldering) Reflow............................+235°C

MAX3344E/MAX3345E

±15kV ESD-Protected USB Transceivers

in UCSP with USB Detect

ELECTRICAL CHARACTERISTICS (continued)

(V CC = 4V to 5.5V bypassed with 1μF to GND, GND = 0, V L = 1.65V to 3.6V, ENUM = V L , T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = 5V, V L = 2.5V, T A = +25°C.) (Note 2)

(V = 4V to 5.5V, GND = 0, V = 1.65V to 3.6V, ENUM = V , T = T to T , unless otherwise noted. Typical values are at

Typical Operating Characteristics

(V CC = 5V, V L = 3.3V, T A = +25°C, unless otherwise noted.)

M A X 3344E /M A X 3345E

±15kV ESD-Protected USB Transceivers in UCSP with USB Detect 4_______________________________________________________________________________________

TIMING CHARACTERISTICS (continued)

(V CC = 4V to 5.5V, GND = 0, V L = 1.65V to 3.6V, ENUM = V L , T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = 5V, V L = 2.5V, T A = +25°C.) (Figures 2–6) (Note 2)

Note 3:Guaranteed by design, not production tested.

1012

1.5

2.1

1.8

2.4

2.7

3.0

3.3

3.6

DIFFERENTIAL RECEIVER PROPAGATION

DELAY vs. V L

V L (V)

P R O P A G A T I O N

D E L A Y (n s )

1012

4.00

4.50

4.25

4.75

5.00

5.25

5.50

DIFFERENTIAL RECEIVER PROPAGATION

DELAY vs. V CC

V CC (V)

P R O P A G A T I O N D E L A Y (n s

)

111014131215

1.5

2.1

1.8

2.4

2.7

3.0

3.3

3.6

SINGLE-ENDED RECEIVER PROPAGATION

DELAY vs. V L

V L (V)

P R O P A G A T I O N D E L A Y (n s )

MAX3344E/MAX3345E

±15kV ESD-Protected USB Transceivers

in UCSP with USB Detect

_______________________________________________________________________________________5

7891011121314154.00

4.50

4.25

4.75

5.00

5.25

5.50SINGLE-ENDED RECEIVER PROPAGATION

DELAY vs. V CC

V CC (V)

P R O P A G A T I O N D E L A Y (n s )

0.4

0.60.81.01.21.41.61.82.04.00 4.504.25 4.75 5.00 5.25 5.50TRANSMITTER SKEW vs. V CC

V CC (V)

T R A N S M I T T E R S K E W (n s )

547698101.5 2.1 2.41.8 2.7 3.0 3.3 3.6

LOGIC CURRENT CONSUMPTION IN

SUSPEND MODE

M A X 3344E /45E t o c 06

V L (V)

I V L (μA )

22252423262728293031324.00

4.50

4.25

4.75

5.00

5.25

5.50

V CC CURRENT CONSUMPTION IN

SUSPEND MODE

M A X 3344E 45

E t o c 07

V CC (V)

I V C C (μA )

3.0

3.1

3.3

3.2

3.4

3.5

4.00

4.50

4.25

4.75

5.00

5.25

5.50

VTRM vs. V CC

V CC (V)

V T R M (V )

D-

D+1V/div RISE- AND FALL-TIME MATCHING

MAX3344E/45E toc09

20ns/div

f = 6MHz

2V/div SUSP SUSPEND RESPONSE

MAX3344E/45E toc10

100ns/div 0

RCV

2V/div

VPO

TRANSMISSION IN SUSPEND MODE

(SUSP = 1)

MAX3344E/45E toc11

2μs/div VMO D+D-

USB_DET

V CC USB_DET RESPONSE

MAX3344E/45E toc12

10μs/div

2V/div

Typical Operating Characteristics (continued)

(V CC = 5V, V L = 3.3V, T A = +25°C, unless otherwise noted.)

M A X 3344E /M A X 3345E

Detailed Description

The MAX3344E/MAX3345E are bidirectional transceivers that convert single-ended or differential logic-level signals to differential USB signals, and convert differential USB signals to single-ended or differential logic-level signals.The MAX3344E/MAX3345E are operational from V CC =5.5V to V CC = 3V (electrical specifications are not guaran-teed for V CC < 4V). Both devices include an internal 1.5k ?pullup resistor that connects and disconnects D+to VTRM (see the Functional Diagram ).

The MAX3344E/MAX3345E are tolerant to power seq-uencing with either V CC > V L or V L > V CC . Additionally,

the USB I/O, D+ and D-, and V CC are ESD protected to ±15kV. The MAX3344E/MAX3345E can receive USB power (V CC ) directly from the USB connection and operate with logic supplies (V L ) down to 1.65V, while still meeting the USB physical layer specifications. The MAX3344E/MAX3345E support full-speed (12Mbps)USB specification 2.0 operation.

The MAX3344E/MAX3345E have an enumerate feature that functions when power is applied. Driving ENUM low disconnects the internal 1.5k ?pullup resistor from D+enumerating the USB. This is useful if changes in commu-nication protocol are required while power is applied, and while the USB cable is connected.

±15kV ESD-Protected USB Transceivers in UCSP with USB Detect 6

_______________________________________________________________________________________

Power-Supply Configurations

Normal Operating Mode

Connect V L and V CC to system power supplies (Table 1). Connect V L to a +1.65V to +3.6V supply. Connect V CC to a +4.0V to +5.5V supply. Alternatively, the MAX3344E/MAX3345E can derive power from a single Li+ battery. Connect the battery to V CC.V VTRM remains above +3.0V for V CC as low as +3.1V.

Additionally, the MAX3344E/MAX3345E can derive power from a 3.3V ±10% voltage regulator. Connect V CC and VTRM to an external +3.3V voltage regulator. Disable Mode

Connect V CC to a system power supply and leave V L unconnected or connect to GND. D+ and D- enter a tri-state mode and V CC consumes less than 20μA of supply current. D+ and D- withstand external signals up to +5.5V in disable mode (Table 2).

Sharing Mode

Connect V L to a system power supply and leave V CC (or V CC and VTRM) unconnected or connect to GND. D+and D- enter a tri-state mode, allowing other circuitry to share the USB D+ and D- lines, and V L consumes less than 20μA of supply current. D+ and D- withstand exter-nal signals up to +5.5V in sharing mode (Table 2).

Device Control

D+ and D-D+ and D- are the USB-side transmitter I/O connec-tions, and are ESD protected to ±15kV using the Human Body Model, ±10kV using IEC 1000-4-2 Air-Gap Discharge, and ±8kV using IEC 1000-4-2 Contact Discharge, making the MAX3344E/MAX3345E ideal for applications where a robust transmitter is required. A 23.7?resistor is required on D+ and D- for normal operation (see the External Resistors section).

ENUM

USB specification 2.0 requires a 1.5k ?pullup resistor on D+ for full-speed (12Mbps) operation. Controlled by enumerate (ENUM), the MAX3344E/MAX3345E provide this internal 1.5k ?resistor. Drive ENUM high to connect the pullup resistor from D+ to VTRM. Drive ENUM low to disconnect the pullup resistor from D+ to VTRM.VPO/VMO, VPI/VMI, and OE

The MAX3344E/MAX3345E system-side inputs are VPO and VMO. Data comes into the MAX3344E/MAX3345E through VPO and VMO. VPO and VMO operate either differentially with VPO as the positive terminal and VMO as the negative terminal, or single ended with VPO as the data input (see the MODE section).

MAX3344E/MAX3345E

±15kV ESD-Protected USB Transceivers

in UCSP with USB Detect

_______________________________________________________________________________________

**High or low.

M A X 3344E /M A X 3345E

±15kV ESD-Protected USB Transceivers in UCSP with USB Detect 8

_______________________________________________________________________________________

The MAX3344E/MAX3345E system-side outputs are VPI, VMI, and RCV. The MAX3344E/MAX3345E send data through VPI, VMI, and RCV. VPI and VMI are out-puts to the single-ended receivers and RCV is the out-put of the differential receiver.

Output enable (OE ) controls data transmission. Drive OE low to enable data transmission on D+ and D-. Drive OE high to disable data transmission or receive data.MODE

MODE is a control input that selects whether differential or single-ended logic signals are recognized by the system side of the MAX3344E/MAX3345E. Drive MODE high to select differential mode with VPO as the positive terminal and VMO as the negative terminal. Drive MODE low to select single-ended mode with VPO as the data input (Table 3).

VTRM

VTRM is the 3.3V output of the internal linear voltage regulator. VTRM powers the internal circuitry of the USB side of the MAX3344E/MAX3345E. Connect a 1μF (min)low-ESR ceramic or plastic capacitor from VTRM to GND, as close to VTRM as possible. Do not use VTRM to power external circuitry.

V CC

Bypass V CC to GND with a 1μF ceramic capacitor as close to the device as possible. If V CC drops below the USB detect threshold, supply current drops below 20μA avoiding excessive V CC current consump-tion, and D+/D- enter a high-impedance state allowing other devices to drive the lines.

USB Detect

USB detect output (USB_DET) signals that V CC is pre-sent. A high at USB_DET indicates that V CC is present,while a low at USB_DET indicates that V CC is not pre-sent. The MAX3344E USB_DET threshold is between 3.6V (min) and 4V (max), while the MAX3345E USB_DET threshold is between 1V (min) and 2.8V (max).

SUSP

Suspend (SUSP) is a control input. Force SUSP high to place the MAX3344E/MAX3345E in a low-power state.In this state, the quiescent supply current into V CC is less than 40μA and RCV goes low.

In suspend mode, VPI and VMI remain active as receive outputs and VTRM stays on. The MAX3344E/MAX3345E continue to receive data from the USB,allowing the μP to sense activity on the D+/D- lines and wake up the MAX3344E/MAX3345E.

The MAX3344E/MAX3345E can also transmit data to D+ and D- while in suspend mode. This function is

used to signal a remote wake-up by driving a signal on D+ and D- for a period of 1ms to 15ms. In suspend mode, data can only be transmitted with full-speed slope control.

Figure 1c. IEC 1000-4-2 ESD Test Model

Figure 1b. Human Body Model Current Waveform

Figure 1a. Human Body ESD Test Models

MAX3344E/MAX3345E

±15kV ESD-Protected USB Transceivers

in UCSP with USB Detect

_______________________________________________________________________________________9

Data Transfer

Receiving Data from the USB

Data received from the USB are output to VPI/VMI in either of two ways, differentially or single ended. To receive data from the USB, force OE high and SUSP low.Differential data arriving at D+/D- appear as differential logic signals at VPI/VMI, and as a single-ended logic sig-nal at RCV. If both D+ and D- are low, then VPI and VMI are low, signaling a single-ended zero condition on the bus; RCV remains in the last known state (Table 3).Transmitting Data to the USB

The MAX3344E/MAX3345E output data to the USB dif-ferentially on D+ and D-. The logic driving signals can be either differential or single ended. For sending differ-ential logic, force MODE high, force OE and SUSP low,and apply data to VPO and VMO. D+ then follows VPO,and D- follows VMO. To send single-ended logic sig-nals, force MODE, SUSP, and OE low, and apply data to VPO/VMO.

ESD Protection

To protect the MAX3344E/MAX3345E against ESD, D+and D- have extra protection against static electricity to protect the device up to ±15kV. The ESD structures withstand high ESD in all states —normal operation,suspend, and powered down. For the 15kV ESD struc-tures to work correctly, a 1μF or greater capacitor must be connected from VTRM to GND.

ESD protection can be tested in various ways; the D+and D- input/output pins are characterized for protection to the following limits:

1) ±15kV using the Human Body Model

2) ±8kV using the IEC 1000-4-2 Contact Discharge Method 3) ±10kV using the IEC 1000-4-2 Air-Gap Method ESD Test Conditions

ESD performance depends on a variety of conditions.Contact Maxim for a reliability report that documents test setup, test methodology, and test results.

Human Body Model

Figure 1a shows the Human Body Model, and Figure 1b shows the current waveform it generates when dis-charged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest,which is then discharged into the test device through a 1.5k ?resistor.

Figure 2. Enable and Disable Timing, Transmitter

Figure 3. Mode 0 Timing

Figure 4. Mode 1 Timing

M A X 3344E /M A X 3345E

±15kV ESD-Protected USB Transceivers in UCSP with USB Detect

IEC 1000-4-2

The IEC 1000-4-2 standard covers ESD testing and per-formance of finished equipment; it does not specifically refer to integrated circuits. The MAX3344E/MAX3345E help the user design equipment that meets level 4 of IEC 1000-4-2, without the need for additional ESD-protection components.

The major difference between tests done using the Human Body Model and IEC 1000-4-2 is a higher peak current in IEC 1000-4-2, because series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD with-stand voltage measured to IEC 1000-4-2 is generally lower than that measured using the Human Body Model.Figure 1c shows the IEC 1000-4-2 model.

The Air-Gap Discharge Method involves approaching the device with a charged probe. The Contact Discharge Method connects the probe to the device before the probe is energized.

Machine Model

The Machine Model for ESD tests all pins using a 200pF storage capacitor and zero discharge resistance. Its objective is to emulate the stress caused by contact that occurs with handling and assembly during manufactur-ing. All pins require this protection during manufactur-ing. Therefore, after PC board assembly, the Machine Model is less relevant to I/O ports.

Applications Information

External Components

External Resistors

Two external 23.7?±1% to 27.4?±1%, 1/2W resistors are required for USB connection. Place the resistors in between the MAX3344E/MAX3345E and the USB connector on the D+ and D- lines (see the Typical Operating Circuit ).

External Capacitors

Use three external capacitors for proper operation. Use a 0.1μF ceramic for decoupling V L , a 1μF ceramic for decoupling V CC , and a 1.0μF (min) ceramic or plastic filter capacitor on VTRM. Return all capacitors to GND.

UCSP Applications Information

For the latest application details on UCSP construction,dimensions, tape carrier information, printed circuit board techniques, bump-pad layout, and recommended reflow temperature profile, as well as the latest information on reliability testing results, refer to the Application Note UCSP—A Wafer-Level Chip-Scale Package available on Maxim’s website at https://www.wendangku.net/doc/2b9720822.html,/ucsp.

MAX3344E/MAX3345E

±15kV ESD-Protected USB Transceivers

in UCSP with USB Detect

______________________________________________________________________________________11

Chip Information

TRANSISTOR COUNT: 2162PROCESS: BiCMOS

M A X 3344E /M A X 3345E

±15kV ESD-Protected USB Transceivers in UCSP with USB Detect 12

______________________________________________________________________________________

Figure 5. D+/D- to RCV, VPI, VMI Propagation Delays

Figure 6. Test Circuits

MAX3344E/MAX3345E

±15kV ESD-Protected USB Transceivers

in UCSP with USB Detect

______________________________________________________________________________________13

Functional Diagram

Pin Configurations

M A X 3344E /M A X 3345E

±15kV ESD-Protected USB Transceivers in UCSP with USB Detect 14______________________________________________________________________________________

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to https://www.wendangku.net/doc/2b9720822.html,/packages .)

MAX3344E/MAX3345E

±15kV ESD-Protected USB Transceivers

in UCSP with USB Detect

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________15?2004 Maxim Integrated Products

Printed USA

is a registered trademark of Maxim Integrated Products.

T S S O P 4.40m m .E P

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to https://www.wendangku.net/doc/2b9720822.html,/packages .)