IDT74FCT16652AT/CT
FAST CMOS 16-BIT BUS TRANSCEIVER/REGISTER
INDUSTRIAL TEMPERATURE RANGE
FAST CMOS 16-BIT BUS
TRANSCEIVER/REGISTER
FEATURES:
IDT74FCT16652AT/CT
DESCRIPTION:
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0.5 MICRON CMOS Technology
High-speed, low-power CMOS replacement for ABT functions
Typical tSK(o) (Output Skew) < 250ps
Low input and output leakage ≤1µA (max.)
VCC = 5V ±10%
High drive outputs (–32mA IOH, 64mA IOL)
Power off disable outputs permit “live insertion”
Typical VOLP (Output Ground Bounce) < 1.0V at VCC = 5V,
TA = 25°C
• Available in SSOP and TSSOP packages
The FCT16652T 16-bit registered transceivers are built using advanced
dual metal CMOS technology. These high-speed, low-power devices are
organized as two independent 8-bit bus transceivers with 3-state D-type
registers. For example, the xOEAB and xOEBA signals control the transceiver
functions.
The xSAB and xSBA control pins are provided to select either real time or
stored data transfer. The circuitry used for select control will eliminate the typical
decoding glitch that occurs in a multiplexer during the transition between stored
and real time data. A low input level selects real-time data and a high level selects
stored data.
Data on the A or B data bus, or both, can be stored in the internal D-flip-flops
by low-to-high transitions at the appropriate clock pins (xCLKAB or xCLKBA),
regardless of the select or enable control pins. Flow-through organization of
signal pins simplifies layout. All inputs are designed with hysteresis for improved
noise margin.
The FCT16652T is ideally suited for driving high capacitance loads and lowimpedance backplanes. The output buffers are designed with power off disable
capability to allow "live insertion" of boards when used as backplane drivers.
FUNCTIONAL BLOCK DIAGRAM
2 OEAB
1 OE AB
1 OEBA
2 OEBA
1 CLKBA
2 CLK BA
1 SBA
2 SBA
1 CLKAB
2 CLK AB
2 SAB
1 SAB
B R EG
B R EG
D
1A 1
D
C
C
1B 1
A R EG
2A 1
2B 1
A R EG
D
D
C
C
TO SEVEN O THER CHANNELS
TO SEVEN O THER CHANNELS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
JUNE 2002
1
© 2002 Integrated Device Technology, Inc.
DSC-5450/2