tc74hc697af TOSHIBA Semiconductor CORPORATION, tc74hc697af Datasheet

tc74hc697af

Manufacturer Part Number

tc74hc697af

Description

Synchronous Presettable 4-bit Binary Up/down Counter With Output Register

Manufacturer

TOSHIBA Semiconductor CORPORATION

Datasheet

1.TC74HC697AF.pdf (13 pages)

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Synchronous Presettable 4-Bit Binary Up/Down Counter with Output Register (multiplexed

3-state outputs)

COUNTERS fabricated with silicon gate C

LSTTL while maintaining the CMOS low power dissipation.

when “counter mode” is selected. If the up/down (

held high, the internal counter counts up. Conversely, if

held low, it counts down.

registers on the rising edge of the Register Clock (RCK) input.

registered outputs by the output select (

the outputs are counter outputs and when low, they are

registered outputs.

are provided to enable cascading of the counters.

using external gates.

discharge or transient excess voltage.

Features

•

The TC74HC697A is high speed CMOS UP/DOWN

It achieve the high speed operation similar to equivalent

It counts on the rising edge of the Counter Clock (CCK) input

The internal counters outputs are latched into the output

The outputs (QA~QD) are selected as either internal counter or

Two enable ( ENP , ENT ) inputs and a carry ( RCO ) output

This facilitates easy implementation of n-bit counters without

All inputs are equipped with protection circuits against static

High speed: f

Low power dissipation: I

High noise immunity: V

Outputs drive capability: 15 LSTTL loads for QA~QD

Symmetrical output impedance:

Balanced propagation delays: t

Wide operating voltage range: V

Pin and function compatible with 74LS697

TC74HC697AP,TC74HC697AF

| = I

max

= 6 mA (min) for QA~QD

= 4 mA (min) for RCO

= 38 MHz (typ.) at V

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

NIH

10 LSTTL loads for RCO

= 4 μ A (max) at Ta = 25°C

= V

pLH

NIL

∼ − t

(opr) = 2~6 V

= 28% V

R/ ) input. When high,

pHL

MOS technology.

= 5 V

(min)

) input is

Weight

DlP20-P-300-2.54A

SOP20-P-300-1.27A

TC74HC697AP

TC74HC697AF

TC74HC697AP/AF

: 1.30 g (typ.)

: 0.22 g (typ.)

2007-10-01

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