TC74HC652AP

2007-10-01

1

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

TC74HC652AP

Octal Bus Transceiver/Register (3-state)

The TC74HC652A is high speed CMOS OCTAL BUS

TRANSCEIVER/REGISTER fabricated with silicon gate CMOS

technology.

It achieves the high speed operation similar to equivalent

LSTTL while maintaining the CMOS low power dissipation.

This device is bus transceiver with 3-state outputs, D-type

flip-flops, and control circuitry arranged for multiplexed

transmission of data directly from the internal registers.

When the enable input GAB and GBA are held high, the A1

thru A8 become inputs and the B1 thru B8 become outputs. When

the GAB and GBA are held low, the A1 thru A8 become output

and the B1 thru B8 become inputs. When GAB is low and GBA

is high, the outputs functions of the A and B Busses are disabled.

The select inputs (SAB, SBA) can multiplex sort and real-time (transparent mode) data.

Data on the A Bus or B Bus can be clocked into the registers on the positive going transition of either CAB or

CBA clock inputs, respectively.

All inputs are equipped with protection circuits against static discharge or transient excess voltage.

Features (Note 1) (Note 2)

• Output drive capability: 15 LSTTL loads

• Pin and function compatible with 74LS652

Note 1: Do not apply a signal to any bus terminal when it is in the output mode. Damage may result.

Note 2: All floating (high impedance) bus terminals must have their input levels fixed by means of pull up or pull

down resistors.

Weight

: 1.50 g (typ.)