TC74AC390P/F/FN

2007-10-01

1

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

TC74AC390P,TC74AC390F,TC74AC390FN

Dual Decade Counter

The TC74AC390 is an advanced high speed CMOS DUAL

DECADE COUNTER fabricated with silicon gate and

It achieves the high speed operation similar to equivalent

Bipolar Schottky TTL while maintaining the CMOS low power

dissipation.

It consists of two independent 4-bit counters, each composed of

a divide-by-two and a divide-by-five counter. The divide-by-two

counter is incremented on the negative going transition of clock A

( CKA ). The divided-by-five counter is incremented on the

negative going transition of clock B ( CKB ). The counter can be

cascaded to form decade, bi-quinary, or various combinations up

to a divide-by-100 counter. When the CLEAR input is set high,

the Q outputs are set to low independent of the clock inputs.

All inputs are equipped with protection circuits against static

discharge or transient excess voltage.

Features

Capability of driving 50

Ω

transmission lines.

• Pin and function compatible with 74HC390

Pin Assignment

Note:

xxxFN (JEDEC SOP) is not available in

Japan.

TC74AC390P

TC74AC390F

TC74AC390FN

Weight

DIP16-P-300-2.54A

: 1.00 g (typ.)

SOP16-P-300-1.27A

: 0.18 g (typ.)

SOL16-P-150-1.27

: 0.13 g (typ.)