CD74HCT573 High Speed CMOS Logic Octal Transparent Latches with 3-State Outputs | TI.com

CD74HCT573 (ACTIVE)

High Speed CMOS Logic Octal Transparent Latches with 3-State Outputs

High Speed CMOS Logic Octal Transparent Latches with 3-State Outputs - CD74HCT573
Datasheet
 

Description

The 'HCT573 devices are octal transparent D-type latches. When the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is low, the Q outputs are latched at the logic levels of the D inputs.

A buffered output-enable (OE\) input can be used to place the eight outputs in either a normal logic state (high or low) 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 in the high-impedance state.

To ensure the high-impedance state during power up or power down, OE\ should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Features

  • 4.5-V to 5.5-V VCC Operation
  • Wide Operating Temperature Range of –55°C to 125°C
  • Balanced Propagation Delays and Transition Times
  • Standard Outputs Drive Up to 10 LS-TTL Loads
  • Significant Power Reduction Compared to LS-TTL Logic ICs
  • Inputs Are TTL-Voltage Compatible

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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)
CD74HCT573 CD54HCT573
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    
-55 to 125     -55 to 125