MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Low-Voltage CMOS 16-Bit
Transparent Latch
With 5V-Tolerant Inputs and Outputs
(3-State, Non-Inverting)
The MC74LCX16373 is a high performance, non鈥搃nverting 16鈥揵it
transparent latch operating from a 2.7 to 3.6V supply. The device is byte
controlled. Each byte has separate Output Enable and Latch Enable
inputs. These control pins can be tied together for full 16鈥揵it operation.
High impedance TTL compatible inputs significantly reduce current
loading to input drivers while TTL compatible outputs offer improved
switching noise performance. A VI specification of 5.5V allows
MC74LCX16373 inputs to be safely driven from 5V devices.
The MC74LCX16373 contains 16 D鈥搕ype latches with 3鈥搒tate
5V鈥搕olerant outputs. When the Latch Enable (LEn) inputs are HIGH, data
on the Dn inputs enters the latches. In this condition, the latches are
transparent, i.e., a latch output will change state each time its D input
changes. When LE is LOW, the latches store the information that was
present on the D inputs a setup time preceding the HIGH鈥搕o鈥揕OW
transition of LE. The 3鈥搒tate 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.
MC74LCX16373
LOW鈥揤OLTAGE
CMOS 16鈥揃IT
TRANSPARENT LATCH
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Designed for 2.7 to 3.6V VCC Operation
5.4ns Maximum tpd
5V Tolerant 鈥?Interface Capability With 5V TTL Logic
Supports Live Insertion and Withdrawal
IOFF Specification Guarantees High Impedance When VCC = 0V
LVTTL Compatible
LVCMOS Compatible
24mA Balanced Output Sink and Source Capability
DT SUFFIX
PLASTIC TSSOP PACKAGE
CASE 1201鈥?1
PIN NAMES
Pins
OEn
LEn
D0鈥揇15
O0鈥揙15
Function
Output Enable Inputs
Latch Enable Inputs
Inputs
Outputs
Near Zero Static Supply Current in All Three Logic States (20碌A)
Substantially Reduces System Power Requirements
鈥?/div>
Latchup Performance Exceeds 500mA
鈥?/div>
ESD Performance: Human Body Model >2000V; Machine Model >200V
11/96
漏
Motorola, Inc. 1996
1
REV 1
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