SN54HC373 Octal D-type Transparent Latches With 3-State Outputs | TI.com

SN54HC373 (ACTIVE) Octal D-type Transparent Latches With 3-State Outputs

Octal D-type Transparent Latches With 3-State Outputs - SN54HC373
Datasheet
 

Description

These 8-bit latches feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

The eight latches of the ’HC373 devices are transparent D-type latches. While the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs are latched at the levels that were set up at the D inputs.

An output-enable (OE)\ input places the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components.

OE\ does not affect the internal operations of the latches. Old data can be retained or new data can be entered while the outputs are off.

Features

  • Wide Operating Voltage Range of 2 V to 6 V
  • High-Current 3-State True Outputs Can Drive Up To 15 LSTTL Loads
  • Low Power Consumption, 80-µA Max ICC
  • Typical tpd = 13 ns
  • ±6-mA Output Drive at 5 V
  • Low Input Current of 1 µA Max
  • Eight High-Current Latches in a Single Package
  • Full Parallel Access for Loading

Parametrics

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Part number Order Technology Family VCC (Min) (V) VCC (Max) (V) Bits (#) Voltage (Nom) (V) F @ nom voltage (Max) (MHz) ICC @ nom voltage (Max) (mA) tpd @ nom Voltage (Max) (ns) IOL (Max) (mA) IOH (Max) (mA) 3-state output Rating Operating temperature range (C)
SN54HC373 Order now HC     2     6     8     6     28     0.08     32     7.8     -7.8     Yes     Military     -55 to 125    
SN74HC373 Samples not available HC     2     6     8     6     28     0.08     32     7.8     -7.8     Yes     Catalog     -40 to 85