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74LVT16652A_15 Datasheet, PDF (1/21 Pages) NXP Semiconductors – 3.3 V 16-bit bus transceiver/register; 3-state | |||
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74LVT16652A
3.3 V 16-bit bus transceiver/register; 3-state
Rev. 03 â 12 January 2005
Product data sheet
1. General description
The 74LVT16652A is a high-performance BiCMOS product designed for VCC operation at
3.3 V. The device can be used as two 8-bit transceivers or one 16-bit transceiver.
Complimentary output enable (OEAB and OEBA) inputs are provided to control the
transceiver functions. Select control (SAB and SBA) inputs are provided to select whether
real-time or stored data is transferred. A LOW input level selects real-time data, and a
HIGH input level selects stored data. The circuitry used for select control eliminates the
typical decoding glitch that occurs in a multiplexer during the transition between stored
and real-time data.
Data on the A or B bus, or both, can be stored in the internal ï¬ip-ï¬ops by LOW-to-HIGH
transitions at the appropriate clock (CPAB or CPBA) inputs regardless of the levels on the
select control or output enable inputs. When SAB and SBA are in real-time transfer mode,
it is possible to store data without using the internal D-type ï¬ip-ï¬ops by simultaneously
enabling OEAB and OEBA. In this conï¬guration, each output reinforces its input. Thus,
when all other data sources to the two sets of bus lines are at high- impedance, each set
of bus lines remains at its last level conï¬guration.
2. Features
s 16-bit bus interface
s 3-state buffers
s Output capability: +64 mA and â32 mA
s TTL input and output switching levels
s Input and output interface capability to systems at 5 V supply
s Bus-hold data inputs eliminate the need for external pull-up resistors to hold unused
inputs
s Live insertion and extraction permitted
s Power-up reset
s Power-up 3-state
s No bus current loading when output is tied to 5 V bus
s Latch-up protection exceeds 500 mA per JESD78
s ESD protection:
x MIL STD 883 method 3015: exceeds 2000 V
x Machine model: exceeds 200 V
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