74ABT899CSC

Number of Channels per Chip : 8
Output Type : 3-State
Packaging : Tube
Supply Voltage - Max : 5.5 V
Maximum Operating Temperature : + 85 C
Supply Voltage - Min : 4.5 V
Input Level : TTL
Output Level : TTL
High Level Output Current : - 32 mA
Low Level Output Current : 64 mA
Logic Type : BiCMOS
Propagation Delay Time : 4.8 ns
Logic Family : 74ABT
Package / Case : SOIC-28


Features:

Latchable transceiver with output sink of 64 mA
Option to select generate parity and check or "feed-through" data/parity in directions A-to-B or B-to-A
Independent latch enables for A-to-B and B-to-A directions
Select pin for ODD/EVEN parity
ERRA and ERRB output pins for parity checking
Ability to simultaneously generate and check parity
May be used in systems applications in place of the 543 and 280
May be used in system applications in place of the 657 and 373 (no need to change T/R to check parity)
Guaranteed output skew
Guaranteed multiple output switching specifications
Output switching specified for both 50 pF and 250 pF loads
Guaranteed simultaneous switching noise level and dynamic threshold performance
Guaranteed latchup protection
High impedance glitch free bus loading during entire power up and power down cycle
Nondestructive hot insertion capability
Disable time less than enable time to avoid bus contention


Pinout




Specifications

Storage Temperature.......................... −65°C to +150°C
Ambient Temperature under Bias........ −55°C to +125°C
Junction Temperature under Bias
    Plastic..................................... ........−55°C to +150°C
V_CC Pin Potential to
    Ground Pin.......................................... −0.5V to +7.0V
Input Voltage (Note 2)............................ −0.5V to +7.0V
Input Current (Note 2)...................... −30 mA to +5.0 mA
Voltage Applied to Any Output
    in the Disabled or
    Power-Off State ....................................−0.5V to 5.5V
    in the HIGH State ...................................−0.5V to V_CC
Current Applied to Output
    in LOW State (Max)............... twice the rated I_OL (mA)
DC Latchup Source Current............................... −500 mA
Over Voltage Latchup (I/O) .......................................10V


Description

The 74ABT899CSC is a 9-bit to 9-bit parity transceiver with transparent latches. The device can operate as a feed-through transceiver or it can generate/check parity from the 8-bit data busses in either direction.

The 74ABT899CSC features independent latch enables for the A-to-B direction and the B-to-A direction, a select pin for ODD/EVEN parity, and separate error signal output pins for checking parity.