54ACT16833, 74ACT16833 DUAL 8-BIT TO 9-BIT PARITY BUS TRANSCEIVERS

SCAS166A - JUNE 1990 - REVISED APRIL 1996

features

Members of the Texas Instruments Widebus^TM Family
Inputs Are TTL-Voltage Compatible
Parity Error Flag With Parity Generator/Checker
Register for Storage of the Parity Error Flag
Flow-Through Architecture Optimizes PCB Layout
Distributed V_CC and GND Pin Configuration Minimizes High-Speed Switching Noise
EPIC^TM (Enhanced-Performance Implanted CMOS) 1-m Process
500-mA Typical Latch-Up Immunity at 125°C
Package Options Include 300-mil Shrink Small-Outline (DL) Packages Using 25-mil Center-to-Center Pin Spacings and 380-mil Fine-Pitch Ceramic Flat (WD) Packages Using 25-mil Center-to-Center Pin Spacings

EPIC and Widebus are trademarks of Texas Instruments

description

The 'ACT16833 consist of two noninverting 8-bit to 9-bit paritybus transceivers and are designed for communication between databuses. For each transceiver, when data is transmitted from the A busto the B bus, an odd-parity bit is generated and output on the parityI/O pin (1PARITY or 2PARITY). When data is transmitted from the B busto the A bus, 1PARITY or 2PARITY is configured as an input andcombined with the B-input data to generate an active-low error flagif odd parity is not detected.

The error (1 or 2) output is configured as anopen-collector output. The B-to-A parity error flag is clocked into1 or 2 on the low-to-high transition of the clock (1CLK or2CLK) input. 1 or 2 is cleared (set high) by takingthe clear (1 or 2) input low.

The output-enable ( and ) inputs can be used to disable thedevice so that the buses are effectively isolated. When both and are low, data is transferred from the A bus to the Bbus and inverted parity is generated. Inverted parity is a forcederror condition that gives the designer more system diagnosticcapability.

The 74ACT16833 is packaged in TI's shrink small-outline package,which provides twice the I/O pin count and functionality of standardsmall-outline packages in the same printed-circuit-board area.

The 54ACT16833 is characterized for operation over the fullmilitary temperature range of -55°C to 125°C. The74ACT16833 is characterized for operation from -40°C to85°C.

Title: DUAL 8-BIT TO 9-BIT PARITY BUS TRANSCEIVERS
Product Family: PARITY TRANSCEIVERS
Device Functionality: DUAL PARITY BUS TRANSCEIVER
Orderable Devices: 74ACT16833DL, 74ACT16833DLR

View the complete PDF datasheet: scas166a.pdf (151 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:74ACT16833

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