74abt544db NXP Semiconductors, 74abt544db Datasheet

no-image

74abt544db

Manufacturer Part Number
74abt544db
Description
Octal Latched Transceiver With Dual Enable; Inverting; 3-state
Manufacturer
NXP Semiconductors
Datasheet
1. General description
2. Features
The 74ABT544 high-performance BiCMOS device combines low static and dynamic
power dissipation with high speed and high output drive.
The 74ABT544 octal latched transceiver contains two sets of D-type latches for temporary
storage of data flowing in either direction. Separate latch enable (LEAB and LEBA) and
output enable (OEAB and OEBA) inputs are provided for each register to permit
independent control of data transfer in either direction. The outputs are guaranteed to sink
64 mA.
The 74ABT544 contains two sets of eight D-type latches, with separate control pins for
each set. Using data flow from A to B as an example, when the A-to-B enable (EAB) input
and the A-to-B latch enable (LEAB) input are LOW, the A-to-B path is transparent.
A subsequent LOW-to-HIGH transition of the LEAB signal puts the A data into the latches
where it is stored and the B outputs no longer change with the A inputs. With EAB and
OEAB both LOW, the 3-state B output buffers are active and invert the data present at the
outputs of the A latches.
Control of data flow from B to A is similar, but using the EBA, LEBA and OEBA inputs.
74ABT544
Octal latched transceiver with dual enable; inverting; 3-state
Rev. 03 — 20 April 2005
Combines 74ABT640 and 74ABT373 type functions in one device
8-bit octal transceiver with D-type latch
Back-to-back registers for storage
Separate controls for data flow in each direction
Output capability: +64 mA and 32 mA
Live insertion and extraction permitted
Power-up 3-state
Power-up reset
Latch-up protection:
ESD protection:
JESD78: exceeds 500 mA
MIL STD 883 method 3015: exceeds 2000 V
Machine model: exceeds 200 V
Product data sheet

Related parts for 74abt544db

Related keywords