M74HCT161M1R データシートの表示（PDF） - STMicroelectronics

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M74HCT161M1R

SYNCHRONOUS PRESETTABLE 4-BIT COUNTER

STMicroelectronics 

M54/74HCT160/161

M54/74HCT162/163

SYNCHRONOUS PRESETTABLE 4-BIT COUNTER

. HIGH SPEED

fMAX = 50 MHz (TYP.) AT VCC = 5 V

. LOW POWER DISSIPATION

ICC = 4 µA (MAX.) AT 25 °C

. OUTPUT DRIVE CAPABILITY

10 LSTTL LOADS

. BALANCED PROPAGATION DELAYS

tPLH = tPHL

. SYMMETRICAL OUTPUT IMPEDANCE

IOH = IOL = 4 mA (MIN.)

. COMPATIBLE WITH TTL OUTPUTS

VIH = 2V (MIN.); VIL = 0.8V (MAX.)

. PIN AND FUNCTION COMPATIBLE

WITH 54/74LS160 ∼ 163

B1R

(Plastic Package)

F1R

(Ceramic Package)

M 1R

(Micro Package)

C1R

(Chip Carrier)

DESCRIPTION

M54/74HCT160 Decade, Asynchronous Clear

M54/74HCT161 Binary, Asynchronous Clear

M54/74HCT162 Decade, Synchronous Clear

M54/74HCT163 Binary, Synchronous Clear

ORDER CODES :

M54HCTXXXF1R M74HCTXXXM1R

M74HCTXXXB1R M74HCTXXXC1R

PIN CONNECTIONS (top view)

The M54/74HCT160, 161, 162 and 163 are high

speed CMOS SYNCHRONOUS PRESETTABLE

COUNTERS fabricated with silicon gate C2MOS

technology. They have the same high speed oper-

ation similar to equivalent LSTTL while maintaining

the CMOS low power dissipation.

The M54/74HCT160/162 are BCD Decade counter-

s and the M54/74HCT161/163 are 4 bit binary

counters. The CLOCK input is active on the rising

edge. Both LOAD and CLEAR inputs are active

Low.

Presetting of all four IC’s is synchronous on the ris-

ing edge of the CLOCK. The function on the

M54/74HCT162/163 is synchronous to CLOCK,

while the M54/74HCT160/161 counters are cleared

asynchronously. Two enable inputs (TE and PE)

and CARRY output are provided to enable easycas-

cading of counters, which facilities easy implemen-

tation of N-bit counters without using external gates.

This integrated circuit has input and output charac-

teristics that are fully compatible with 54/74 LSTTL

logic families. M54/74HCT devices are designed to

directly interface HSC2MOS systems with TTL and

NMOS components. They are also plug in replace-

ments for LSTTL devices giving a reduction of

power consumption. All inputs are equipped with

NC =

No Inter-

nal Con-

October 1993

1/16

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