M74HC393(1993) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

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M74HC393
(Rev.:1993)

DUAL BINARY COUNTER

STMicroelectronics 

. HIGH SPEED

fMAX = 72 MHz (TYP.) AT VCC = 5 V

. LOW POWER DISSIPATION

ICC = 4 µA (MAX.) AT TA = 25 °C

. HIGH NOISE IMMUNITY

VNIH = VNIL = 28 % VCC (MIN.)

. OUTPUT DRIVE CAPABILITY

10 LSTTL LOADS

. SYMMETRICAL OUTPUT IMPEDANCE

|IOH| = IOL = 4 mA (MIN.)

. BALANCED PROPAGATION DELAYS

tPLH = tPHL

. WIDE OPERATING VOLTAGE RANGE

VCC (OPR) = 2 V TO 6 V

. PIN AND FUNCTION COMPATIBLE

WITH 54/74LS393

M54HC393

M74HC393

DUAL BINARY COUNTER

B1R

(Plastic Package)

F1R

(Ceramic Package)

M 1R

(Micro Package)

C1R

(Chip Carrier)

ORDER CODES :

M 54HC 39 3F 1R

M 74H C3 93 M1 R

M 74HC 39 3B 1R

M 74H C3 93 C1 R

PIN CONNECTIONS (top view)

DESCRIPTION

The M54/74HC393 is a high speed CMOS DUAL

BINARY COUNTER fabricated in silicon gate

C2MOS technology. It has the same high speed

performance of LSTTL combined with true COMS

low power consumption.

This counter circuit contains independent ripple

carry counters and two 4-bit ripple carry binary

counters, which can be cascated to create a single

divide by 256 counter.

Each 4-bit counter is incremented on the high to low

transition (negative edge) of the clock input,and

each has an independent clear input. When clear is

set to low all four bits of each counter are set to a

low level. This enables count truncation and allows

the implementation od divide by N counter

configurations.

All inputs are equipped with protection circuits

against static discharge and transient excess

voltage.

NC =

No Internal

Connection

February 1993

1/12

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