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M74HC4518RM13TR中文资料

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July 2001s

HIGH SPEED : f MAX = 60 MHz (TYP .) at V CC = 6V s

LOW POWER DISSIPATION:I CC =4μA(MAX.) at T A =25°C s

HIGH NOISE IMMUNITY:

V NIH = V NIL = 28 % V CC (MIN.)

SYMMETRICAL OUTPUT IMPEDANCE:|I OH | = I OL = 4mA (MIN)

BALANCED PROPAGATION DELAYS:t PLH ? t PHL

WIDE OPERATING VOLTAGE RANGE:V CC (OPR) = 2V to 6V

PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 4518

DESCRIPTION

The M74HC4518 is an high speed CMOS DUAL BINARY COUNTER fabricated with silicon gate C 2MOS technology.

It consist of two identical internally synchronous 4-stage counters. The counter stages are D-TYPE flip-flops having interchangeable CLOCK and ENABLE inputs for incrementing on either the positive-going or negative-going transition.

For single-unit operation the ENABLE input is maintained "high" and the counter advances on

each positive-going transition of the CLOCK. The counters are cleared by high levels on their clear lines.

The counter can be cascaded in the ripple mode by connecting Q4 to the enable input of the subsequent counter while the clock input of the latter is held permanently low.

All inputs are equipped with protection circuits against static discharge and transient excess voltage.

M74HC4518

DUAL DECADE COUNTER

ORDER CODES

PACKAGE TUBE T & R

DIP M74HC4518B1R SOP M74HC4518M1R

M74HC4518RM13TR TSSOP

M74HC4518TTR

M74HC4518

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INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

TRUTH TABLE

Z : High Impedance

LOGIC DIAGRAM

PIN No SYMBOL NAME AND FUNCTION 1, 91CLOCK, 2CLOCK Clock Inputs (LOW to HIGH, Edge-Triggered)2, 101ENABLE, 2ENABLE Clock Enable Inputs 3, 4, 5, 61Q0 to 1Q3Data Outputs

7, 151CLEAR, 2CLEAR

Asynchronous Reset Inputs (Active LOW)

11, 12, 13,

142Q0 tO 2Q3Data Outputs

8GND Ground (0V)

Vcc

Positive Supply Voltage

M74HC4518

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TIMING CHART

ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied

(*) 500mW at 65 °C; derate to 300mW by 10mW/°C from 65°C to 85°C

Symbol Parameter

Value Unit V CC Supply Voltage -0.5 to +7V V I DC Input Voltage -0.5 to V CC + 0.5V V O DC Output Voltage -0.5 to V CC + 0.5

V I IK DC Input Diode Current ± 20mA I OK DC Output Diode Current ± 20mA I O

DC Output Current

± 25mA I CC or I GND DC V CC or Ground Current

± 50mA P D Power Dissipation

500(*)mW T stg Storage Temperature -65 to +150

°C T L

Lead Temperature (10 sec)

300

°C

M74HC4518

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RECOMMENDED OPERATING CONDITIONS

DC SPECIFICATIONS

Symbol Parameter

Value Unit V CC Supply Voltage 2 to 6V V I Input Voltage 0 to V CC V V O Output Voltage 0 to V CC V T op Operating Temperature -55 to 125°C t r , t f

Input Rise and Fall Time

V CC = 2.0V 0 to 1000ns V CC = 4.5V 0 to 500ns V CC = 6.0V

0 to 400

Symbol

Parameter

Test Condition

Value Unit

V CC (V)T A = 25°C -40 to 85°C -55 to 125°C Min.Typ.

Max.

Min.Max.

V IH

High Level Input Voltage

2.0 1.5 1.5 1.5V 4.5

3.15 3.15 3.156.0

4.2

V IL

Low Level Input Voltage

2.00.50.50.5V

4.5 1.35 1.35 1.356.0 1.8

1.8

1.8V OH

High Level Output Voltage

2.0I O =-20 μA 1.9 2.0 1.9 1.9V

4.5I O =-20 μA 4.4 4.5 4.4 4.46.0I O =-20 μA

5.9

6.0 5.9 5.94.5I O =-4.0 mA 4.18 4.31 4.13 4.106.0

I O =-5.2 mA 5.68

5.8 5.63

5.60

V OL

Low Level Output Voltage

2.0I O =20 μA 0.00.10.10.1V 4.5I O =20 μA 0.00.10.10.16.0I O =20 μA 0.00.10.10.14.5I O =4.0 mA 0.170.260.370.406.0

I O =5.2 mA 0.18

0.260.370.40I I Input Leakage Current

6.0V I = V CC or GND ± 0.1± 1± 1μA I CC

Quiescent Supply Current

6.0

V I = V CC or GND

μA

M74HC4518

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AC ELECTRICAL CHARACTERISTICS (C L = 50 pF, Input t r = t f = 6ns)

CAPACITIVE CHARACTERISTICS

1) C PD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I CC(opr) = C PD x V CC x f IN + I CC /2 (per Counter)

Symbol

Parameter

Test Condition

Value Unit

V CC (V)T A = 25°C -40 to 85°C -55 to 125°C Min.

Typ.Max.Min.

Max.Min.

Max.t TLH t THL Output Transition

Time 2.0307595110ns 4.581519226.07131619t PLH t PHL Propagation Delay

Time

(CK, ENABLE - Qn) 2.072160200240ns

4.5223240486.018273441t PHL

Propagation Delay Time

(CLR - Qn) 2.065150190225ns

4.5203038456.01626

f MAX

Maximum Clock Frequency 2.0623 4.84MHz

4.5305124206.035

6028

t W(H) t W(L)Minimum Pulse Width

(CLOCK ,ENABLE) 2.025*******ns

4.561519226.05131619t W(L)

Minimum Pulse Width (CLEAR)

2.020*******ns

4.551519226.04131619t REM

Minimum Removal Time (CLEAR)

2.021506075ns

4.531012156.0

Symbol

Parameter

Test Condition

Value Unit

V CC (V)

T A = 25°C -40 to 85°C -55 to 125°C Min.

Typ.Max.Min.

Max.Min.

Max.C IN Input Capacitance 510

pF C PD

Power Dissipation Capacitance (note 1)

M74HC4518

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TEST CIRCUIT

L R T = Z OUT of pulse generator (typically 50?)

WAVEFORM 1: MINIMUM PULSE WIDTH AND REMOVAL TIME

(f=1MHz; 50% duty cycle)

M74HC4518

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WAVEFORM 2 : PROPAGATION DELAY TIME, MINIMUM PULSE WIDTH

(f=1MHz; 50% duty cycle)

M74HC4518 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.

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