74LVCZ161284A datasheet(2/12 Pages) STMICROELECTRONICS

Part #	74LVCZ161284A

Description	LOW VOLTAGE HIGH SPEED IEEE 1284 TRANSCEIVER WITH ERROR-FREE POWER-UP

PDF	12 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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2 / 12 page

74LVCZ161284A

2/12

inverting signals of the associated inputs are

driven through Y outputs. This special feature

prevents

printer

system

errors

caused

deasserting the BUSY signal in the cable at

power-on.

It is available in the commercial temperature

range.

LOGIC DIAGRAM

NOTE A:

The PMOS transistors prevent backdriving current from the signal pins to VCC/CABLE when VCC/CABLE is open or at GND. The

PMOS transistor is turned off when the associated driver is in the low state.

NOTE B:

The PMOS transistor prevents backdriving current from the signal pins to VCC/CABLE when VCC/CABLE is open or at GND.

NOTE C:

Active input detection circuit forces Y9-Y13 to the low state after power-on until one of the A9-A13 goes high. See below.

ACTIVE INPUT DETECTION CIRCUIT

74LVCZ161284A Datasheet(PDF) 2 Page - STMicroelectronics