SN74HC374 Octal Edge-Triggered D-Type Flip-Flops With 3-State Outputs | TI.com

SN74HC374 (ACTIVE) Octal Edge-Triggered D-Type Flip-Flops With 3-State Outputs

Octal Edge-Triggered D-Type Flip-Flops With 3-State Outputs - SN74HC374
Datasheet
 

Description

These 8-bit flip-flops 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 flip-flops of the \x92HC374 devices are edge-triggered D-type flip-flops. On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels that were set up at the data (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 flip-flops. 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

  • Wide Operating Voltage Range of 2 V to 6 V
  • High-Current 3-State True Outputs Can
    Drive Up To 15 LSTTL Loads
  • Eight D-Type Flip-Flops in a Single Package
  • Full Parallel Access for Loading
  • Low Power Consumption, 80-µA Max ICC
  • Typical tpd = 14 ns
  • ±6-mA Output Drive at 5 V
  • Low Input Current of 1 µA Max

Parametrics

Compare all products in D-type flip-flop Email Download to Excel
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)
SN74HC374 Order now HC     2     6     8     3.3
5    
28     0.08     38     7.8     -7.8     Yes     Catalog     -40 to 85    
SN54HC374 Samples not available HC     2     6     8     3.3
5    
28     0.08     38     7.8     -7.8     Yes     Military     -55 to 125