MC74VCX16373 Datasheet, PDF (1/8 Pages) Motorola, Inc – LOW-VOLTAGE 1.8/2.5/3.3V 16-BIT TRANSPARENT LATCH

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Low-Voltage 1.8/2.5/3.3V
16-Bit Transparent Latch
With 3.6V-Tolerant Inputs and
Outputs (3-State, Non-Inverting)
The MC74VCX16373 is an advanced performance, non–inverting
16–bit transparent latch. It is designed for very high–speed, very
low–power operation in 1.8V, 2.5V or 3.3V systems. The VCX16373 is
byte controlled, with each byte functioning identically, but independently.
Each byte has separate Output Enable and Latch Enable inputs. These
control pins can be tied together for full 16–bit operation.
When operating at 2.5V (or 1.8V) the part is designed to tolerate
voltages it may encounter on either inputs or outputs when interfacing to
3.3V busses. It is guaranteed to be over–voltage tolerant to 3.6V.
The MC74VCX16373 contains 16 D–type latches with 3–state
3.6V–tolerant outputs. When the Latch Enable (LEn) inputs are HIGH,
data on the Dn inputs enters the latches. In this condition, the latches are
transparent, (a latch output will change state each time its D input
changes). When LE is LOW, the latch stores the information that was
present on the D inputs a setup time preceding the HIGH–to–LOW
transition of LE. The 3–state outputs are controlled by the Output Enable
(OEn) inputs. When OE is LOW, the outputs are enabled. When OE is
HIGH, the standard outputs are in the high impedance state, but this does
not interfere with new data entering into the latches.
• Designed for Low Voltage Operation: VCC = 1.8–3.6V
• 3.6V Tolerant Inputs and Outputs
• High Speed Operation: 3.0ns max for 3.0 to 3.6V
3.4ns max for 2.3 to 2.7V
6.0ns max for 1.8V
• Static Drive:
±24mA Drive at 3.0V
±18mA Drive at 2.3V
±6mA Drive at 1.8V
• Supports Live Insertion and Withdrawal
• IOFF Specification Guarantees High Impedance When VCC = 0V
• Near Zero Static Supply Current in All Three Logic States (20µA)
Substantially Reduces System Power Requirements
• Latchup Performance Exceeds ±300mA
• ESD Performance: Human Body Model >2000V; Machine Model >200V
MC74VCX16373
VCX
LOW–VOLTAGE 1.8/2.5/3.3V
16–BIT TRANSPARENT LATCH
DT SUFFIX
48–LEAD PLASTIC TSSOP PACKAGE
CASE 1201–01
PIN NAMES
Pins
Function
OEn
LEn
D0–D15
O0–O15
Output Enable Inputs
Latch Enable Inputs
Inputs
Outputs
This document contains information on a product under development. Motorola reserves the right to
change or discontinue this product without notice.
10/97
© Motorola, Inc. 1997
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