PI74FCT16244T中文资料
PI74FCT16244/162244/162H244T
16-BIT BUFFER/LINE DRIVERS 123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567 123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567
1OE
1A01Y0 1A11Y1 1A21Y2 1A31Y33OE
3A03Y0 3A13Y1 3A23Y2 3A33Y3
2OE
2A02Y0 2A12Y1 2A22Y2 2A32Y34OE
4A04Y0 4A14Y1 4A24Y2 4A34Y3
Logic Block Diagram Product Description:
Pericom Semiconductor’s PI74FCT series of logic circuits are pro-duced in the Company’s advanced 0.6 micron CMOS technology, achieving industry leading speed grades.
The PI74FCT16244T, PI74FCT162244T, and PI74FCT162H244T are non-inverting 16-bit buffer/line drivers designed for applications driving high capacitance loads and low impedance backplanes. These high-speed, low power devices offer bus/backplane interface capability and a flow-through organization for ease of board layout. These devices are designed with three-state controls to operate in a Quad-Nibble, Dual-Byte, or a single 16-bit word mode.
The PI74FCT16244T output buffers are designed with a Power-Off disable allowing "live insertion" of boards when used as backplane drivers.
The PI74FCT162244T has ±24 mA balanced output drivers. It is designed with current limiting resistors at its outputs to control the output edge rate resulting in lower ground bounce and undershoot. This eliminates the need for external terminating resistors for most interface applications.
The PI74FCT162H244T has "Bus Hold" which retains the input's last state whenever the input goes to high-impedance preventing "floating" inputs and eliminating the need for pull-up/down resistors.
Product Features:
Common Features:
?PI74FCT16244T, PI74FCT162244T and
PI74FCT162H244T are high-speed, low power devices with high current drive.
?Vcc = 5V ±10%
?Hysteresis on all inputs
?Packages available:
– 48-pin 240 mil wide plastic TSSOP (A48)
– 48-pin 300 mil wide plastic SSOP (V48)
?Device models available upon request.
PI74FCT16244T Features:
?High output drive: I OH = –32 mA; I OL = 64 mA ?Power off disable outputs permit "live insertion"?Typical V OLP (Output Ground Bounce) < 1.0V at V CC = 5V, T A = 25°C
PI74FCT162244T Features:
?Balanced output drivers: ±24 mA
?Reduced system switching noise
?Typical V OLP (Output Ground Bounce) < 0.6V at V CC = 5V, T A = 25°C
PI74FCT162H244T Features:
?Bus Hold retains last active bus state during 3-state ?Eliminates the need for external pull-up resistors
PI74FCT16244T PI74FCT162244T PI74FCT162H244T Fast CMOS 16-Bit Buffer/Line Drivers
Product Pin Description
Pin Name Description
xOE 3-State Output Enable Inputs (Active LOW)xAx Inputs (1)
xYx 3-State Outputs GND Ground V CC Power
Inputs (1)
Outputs (1)
X OE
xAx xYx L L L L H H H
X
Z
Truth Table
NOTE:1.H = High Voltage Level, X = Don't Care, L = Low
Voltage Level, Z = High Impedance
Product Pin Configuration
Note:
1.For the PI74FCT162H244T, these pins have "Bus Hold". All other pins are standard, outputs, or I/Os.
DC Electrical Characteristics (Over the Operating Range, T A = –40°C to +85°C, V CC = 5.0V ± 10%)
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)Storage Temperature .................................................................–55°C to +125°C Ambient Temperature with Power Applied ................................–40°C to +85°C Supply Voltage to Ground Potential (Inputs & Vcc Only)..........–0.5V to +7.0V Supply Voltage to Ground Potential (Outputs & D/O Only).......–0.5V to +7.0V DC Input Voltage .........................................................................–0.5V to +7.0V DC Output Current ...................................................................................120 mA Power Dissipation.........................................................................................1.0W
Note:
Stresses greater than those listed under
MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
Notes:
1.For conditions show as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2.Typical values are at Vcc = 5.0V, +25°C ambient and maximum loading.
3.Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4.The test limit for this parameter is ± 5 μA at T A = –55°C.
5.Pins with Bus Hold are identified in the pin description.
6.This specification does not apply to bi-directional functionalities with Bus Hold.
PI74FCT16244T Output Drive Characteristics (Over the Operating Range)
Parameters Description Test Conditions(1)Min.Typ(2)Max.Units V OH Output HIGH Voltage V CC = Min., V IN = V IH or V IL I OH = –3.0 mA 2.5 3.5V
I OH = –15.0 mA 2.4 3.5
I OH = –32.0 mA 2.0 3.0
V OL Output LOW Voltage V CC = Min., V IN = V IH or V IL I OL = 64 mA0.20.55V
I OFF Power Down Disable V CC = 0V, V IN or V OUT≤ 4.5V——±100μA
PI74FCT162244T/162H244T Output Drive Characteristics (Over the Operating Range)
Parameters Description Test Conditions(1)Min.Typ(2)Max.Units V OH Output HIGH Voltage V CC = Min., V IN = V IH or V IL I OH = –24.0 mA 2.4 3.3V V OL Output LOW Voltage V CC = Min., V IN = V IH or V IL I OL = 24 mA0.30.55V
I ODL Output LOW Current V CC = 5V, V IN = V IH OR V IL, V OUT = 1.5V(3)60115150mA
I ODH Output HIGH Current V CC = 5V, V IN = V IH OR V IL, V OUT = 1.5V(3)–60–115–150mA
Capacitance (T A = 25°C, f = 1 MHz)
Parameters(4)Description Test Conditions Typ Max.Units
C IN Input Capacitance V IN = 0V 4.56pF
C OUT Output Capacitance V OUT = 0V 5.58pF Notes:
1.For conditions show as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device
type.
2.Typical values are at Vcc = 5.0V, +25°C ambient and maximum loading.
3.Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4.This parameter is determined by device characterization but is not production tested.
Power Supply Characteristics
Parameters Description Test Conditions(1)Min.Typ(2)Max.Units
I CC Quiescent Power V CC = Max.V IN = GND or V CC0.1500μA
Supply Current
?I CC Supply Current per V CC = Max.V IN = 3.4V(3)0.5 1.5mA Input @ TTL HIGH
I CCD Supply Current per V CC = Max.,V IN = V CC60100μA/
Input per MHz(4)Outputs Open V IN = GND MHz
X OE = GND
One Bit Toggling
50% Duty Cycle
I C Total Power Supply V CC = Max.,V IN = V CC0.6 1.5(5)mA
Current(6)Outputs Open V IN = GND
f I = 10 MH Z
50% Duty Cycle
X OE = GND
One Bit Toggling V IN = 3.4V0.9 2.3(5)
V IN = GND
V CC = Max.,V IN = V CC 2.4 4.5(5)
Outputs Open V IN = GND
f I = 2.5 MH Z
50% Duty Cycle
X OE = GND
16 Bits Toggling V IN = 3.4V 6.416.5(5)
V IN = GND
Notes:
1.For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device.
2.Typical values are at Vcc = 5.0V, +25°C ambient.
3.Per TTL driven input (V IN = 3.4V); all other inputs at Vcc or GND.
4.This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5.Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested.
6.I C =I QUIESCENT + I INPUTS + I DYNAMIC
I C = I CC + ?I CC D H N T + I CCD (f CP/2 + f I N I)
I CC = Quiescent Current
?I CC = Power Supply Current for a TTL High Input (V IN = 3.4V)
D H = Duty Cycle for TTL Inputs High
N T = Number of TTL Inputs at D H
I CCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f CP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
f I = Input Frequency
N I = Number of Inputs at f I
All currents are in milliamps and all frequencies are in megahertz.
PI74FCT16244T Switching Characteristics over Operating Range
PI74FCT162244T Switching Characteristics over Operating Range
PI74FCT162H244T Switching Characteristics over Operating Range
Notes:
1.See test circuit and wave forms.
2.Minimum limits are guaranteed but not tested on Propagation Delays.
3.This parameter is guaranteed but not production tested.
4.Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.
Pericom Semiconductor Corporation