IDT54/74FCT16543T/AT/CT/ET
IDT54/74FCT162543T/AT/CT/ET
FAST CMOS
16-BIT LATCHED
TRANSCEIVER
Integrated Device Technology, Inc.
FEATURES:
DESCRIPTION:
• Common features:
The FCT16543T/AT/CT/ET and FCT162543T/AT/CT/ET
– 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
16-bit latched transceivers are built using advanced dual metal
CMOS technology. These high-speed, low-power devices are
organized as two independent 8-bit D-type latched transceiv-
ers with separate input and output control to permit indepen-
dent control of data flow in either direction. For example, the A-
to-B Enable (xCEAB) must be LOW in order to enter data from
the A port or to output data from the B port. xLEABcontrols the
latch function. When xLEAB is LOW, the latches are transpar-
TSSOP, 15.7 mil pitch TVSOP and 25 mil pitch Cerpack ent. A subsequent LOW-to-HIGH transition of xLEAB signal
– Extended commercial range of -40°C to +85°C
– VCC = 5V ±10%
putstheAlatchesinthestoragemode. xOEABperformsoutput
enable function on the B port. Data flow from the B port to the
A port is similar but requires using xCEBA, xLEBA, and xOEBA
inputs. Flow-through organization of signal pins simplifies
layout. All inputs are designed with hysteresis for improved
noise margin.
The FCT16543T/AT/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"liveinsertion"ofboardswhenusedasbackplanedrivers.
The FCT162543T/AT/CT/ET have balanced output drive
with current limiting resistors. This offers low ground bounce,
minimal undershoot, and controlled output fall times–reducing
the need for external series terminating resistors. The
FCT162543T/AT/CT/ET are plug-in replacements for the
FCT16543T/AT/CT/ET and 54/74ABT16543 for on-board bus
interface applications.
• Features for FCT16543T/AT/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 FCT162543T/AT/CT/ET:
– Balanced Output Drivers: ±24mA (commercial),
±16mA (military)
– Reduced system switching noise
– Typical VOLP (Output Ground Bounce) < 0.6V at
VCC = 5V,TA = 25°C
FUNCTIONAL BLOCK DIAGRAM
2OEBA
2CEBA
1
OEBA
CEBA
LEBA
OEAB
CEAB
LEAB
1
2LEBA
2OEAB
2CEAB
1
1
1
2LEAB
1
C
C
D
2A1
1A1
2B1
D
1B1
C
D
C
D
TO 7 OTHER CHANNELS
TO 7 OTHER CHANNELS
2618 drw 02
2618 drw 01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
SEPTEMBER 1996
1996 Integrated Device Technology, Inc.
5.12
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