4-73

FAST AND LS TTL DATA

MC74F160A

• MC74F162A

GUARANTEED OPERATING RANGES

Symbol

Parameter

Min

Typ

Max

Unit

VCC

Supply Voltage

74

4.5

5.0

5.5

V

TA

Operating Ambient Temperature Range

74

0

25

70

°C

IOH

Output Current — High

74

–1.0

mA

IOL

Output Current — Low

74

20

mA

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)

Limits

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

VIH

Input HIGH Voltage

2.0

V

Guaranteed Input HIGH Voltage for

All Inputs

VIL

Input LOW Voltage

0.8

V

Guaranteed Input LOW Voltage for

All Inputs

VIK

Input Clamp Diode Voltage

–1.2

V

VCC = MIN, IIN = – 18 mA

VOH

Output HIGH Voltage

74

2.5

3.4

V

IOH = –1.0 mA

VCC = 4.50 V

74

2.7

3.4

V

IOH = –1.0 mA

VCC = 4.75 V

VOL

Output LOW Voltage

0.35

0.5

V

IOL = 20 mA

VCC = MIN

IIH

Input HIGH Current

20

µA

VCC = MAX, VIN = 2.7 V

0.1

mA

VCC = MAX, VIN = 7.0 V

IIL

Input LOW Current

MR, Data, CEP, Clock

PE, CET, SR

–0.6

–1.2

mA

VCC = MAX, VIN = 0.5 V

IOS

Output Short Circuit Current (Note 2)

–60

– 150

mA

VCC = MAX, VOUT = 0 V

ICC

Power Supply Current

37

55

mA

VCC = MAX

NOTES:

1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type.

2. Not more than one output should be shorted at a time, nor for more than 1 second.

The Terminal Count (TC) output is HIGH when CET is HIGH

and the counter is in state 9. To implement synchronous multi-

stage counters, the TC outputs can be used with the CEP and

CET inputs in two different ways. Please refer to the

MC74F568 data sheet. The TC output is subject to decoding

spikes due to internal race conditions and is therefore not rec-

ommended for use as a clock or asynchronous reset for

flip-flops, counters, or registers. In the MC74F160A and

MC74F162A decade counters, the TC output is fully decoded

and can only be HIGH in state 9. If a decade counter is preset

to an illegal state, or assumes an illegal state when power is

applied, it will return to the normal sequence within two

counts, as shown in the State Diagram.

Logic Equations:

Count Enable = CEP

• CET • PE

TC = Q0 • Q1 • Q2 • Q3 • CET