CD54HC373

Features:

`2-V to 6-V VCC Operation
`Wide Operating Temperature Range of 55 to 125
`Balanced Propagation Delays and
`Transition Times
`Standard Outputs Drive up to 15 LS-TTL Loads
`Significant Power Reduction Compared to LS-TTL Logic ICs


Pinout




Specifications

Supply voltage range, VCC  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . .. . . .0.5 V to 7 V
Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1)  . . . . . . . . . . . . . . . . . . . . .±20 mA
Continuous output drain current per output, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . .  ±35 mA
Continuous output source or sink current per output, IO (VO = 0 to VCC)  . . . . . . . . . . . . ±25 mA
Continuous current through VCC or GND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±50 mA
Package thermal impedance, JA (see Note 2): E package. . . . . . . . . . . . . . . . . . .. . . . . . . 69/W
                                                                          M package  . . . . . . . . . . . . . . . . . . . . . . . . .58/W
Storage temperature range, Tstg  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65 to 150


Description

The 'HC373 devices are octal transparent D-type latches designed for 2-V to 6-V VCC operation.

When theCD54HC373  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 CD54HC373 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 CD54HC373 minimum value of the resistor is determined by the current-sinking capability of the driver.