SN74HCT373 Octal Transparent D-Type Latches With 3-State Outputs | TI.com

SN74HCT373 (ACTIVE)

Octal Transparent D-Type Latches With 3-State Outputs

Octal Transparent D-Type Latches With 3-State Outputs - SN74HCT373
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 ’HCT373 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

  • Operating Voltage Range of 4.5 V to 5.5 V
  • High-Current 3-State True Outputs Can Drive Up To 15 LSTTL Loads
  • Low Power Consumption, 80-µA Max ICC
  • Typical tpd = 21 ns
  • ±6-mA Output Drive at 5 V
  • Low Input Current of 1 µA Max
  • Inputs Are TTL-Voltage Compatible
  • Eight High-Current Latches in a Single Package
  • Full Parallel Access for Loading

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Parametrics Compare all products in D-Type Latch

 
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)
Pin/Package
SN74HCT373 SN54HCT373
HCT     HCT    
4.5     4.5    
5.5     5.5    
8     8    
5     5    
25     25    
0.08     0.08    
40     40    
6     6    
-6     -6    
Yes     Yes    
Catalog     Military    
-40 to 85     -55 to 125    
20PDIP
20SO
20SOIC
20TSSOP    
20CDIP
20CFP
20LCCC    

Other qualified versions of SN74HCT373

Version Part Number Definition
Military SN54HCT373 QML certified for Military and Defense Applications