IDT74FCT16601AT/CT/ET
IDT74FCT162601AT/CT/ET
PRODUCT PREVIEW
FAST CMOS
18-BIT UNIVERSAL BUS
TRANSCEIVER
Integrated Device Technology, Inc.
WITH 3-STATE OUTPUTS
bitregisteredtransceiversarebuiltusingadvanceddualmetal
CMOS technology. These high-speed, low-power 18-bit reg-
istered bus transceivers combine D-type latches and D-type
flip-flops to allow data flow in either direction in a transparent,
latched or clocked mode. Each direction has an independent
latchenable,anindependentclockwithaclockenable,andan
independent output enable. The package is organized with a
flow-through signal pin organization to ease board layout. All
inputs are designed with hysteresis for improved noise mar-
gin.
This transceiver is ideally suited for high speed memory
interfaces which utilize high speed synchronous writes, by
clocking the data into a high speed register. Reads can then
be performed in a transparent or latched mode utilizing the
same transceiver.
The FCT16601AT/CT/ET are ideally suited for driving
high-capacitance loads and low-impedance backplanes. The
output buffers are designed with power off disable capability
to allow "live insertion" of boards when used as backplane
drivers.
The FCT162601AT/CT/ET have balanced output drive
with current limiting resistors. This offers low ground bounce,
minimalundershoot,andcontrolledoutputfalltimes–reducing
the need for external series terminating resistors. The
FCT162601AT/CT/ET are plug-in replacements for the
FCT16601AT/CT/ET and ABT16601 for on-board bus inter-
face applications.
FEATURES:
• Common features:
– 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.)
– ESD > 2000V per MIL-STD-883, Method 3015;
> 200V using machine model (C = 200pF, R = 0)
– Packages include 25 mil pitch SSOP, 19.6 mil pitch
TSSOP, 15.7 mil pitch TVSOP and 25 mil pitch Cerpack
– Extended commercial range of -40°C to +85°C
– VCC = 5V ±10%
• Features for FCT16601AT/CT/ET:
– 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
• Features for FCT162601AT/CT/ET:
– Balanced Output Drivers: ±24mA
– Reduced system switching noise
– Typical VOLP (Output Ground Bounce) < 0.6V at
VCC = 5V,TA = 25°C
DESCRIPTION:
The FCT16601AT/CT/ET and FCT162601AT/CT/ET 18-
FUNCTIONAL BLOCK DIAGRAM
1
OEAB
56
CLKENAB
55
CLKAB
2
LEAB
28
LEBA
30
CLKBA
29
CLKENBA
27
PRODUCT PREVIEW
OEBA
CE
1D
C1
3
54
A1
B1
CLK
CE
1D
C1
CLK
3247 drw 01
TO 17 OTHER CHANNELS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGE
AUGUST 1996
1996 Integrated Device Technology, Inc.
5.9
DSC-3247/-
1