74HC573 - Octal D-type Transparent Latch IC
74HC573 IC Features and Specifications
Here are some of the important features and specifications of the 74HC573 IC.
- Operating voltage: –0.5 V to 7 V(Max)
- Wide operating temperature: –55°C to 125
- 3-State Outputs Directly Drive Bus Lines
- Balanced Propagation Delays and Transition time
- Can drive up to 15 LS-TTL Loads
Note: More technical information can be found in the 74HC573 Datasheet, linked at the bottom of this page.
74HC573 Pinout Configuration
The latch IC consists of 20 pins in total, the table below can be referred in order to understand the pin configuration of the IC.
|
Pin Number |
Pin Type |
Pin Description |
|
1 |
OE’ |
3-state output enable input (active LOW) |
|
2 |
1D |
Data Input |
|
3 |
2D |
Data Input |
|
4 |
3D |
Data Input |
|
5 |
4D |
Data Input |
|
6 |
5D |
Data Input |
|
7 |
6D |
Data Input |
|
8 |
7D |
Data Input |
|
9 |
8D |
Data Input |
|
10 |
GND |
Ground |
|
11 |
LE |
latch enable input (active HIGH) |
|
12 |
8Q |
3-state latch output |
|
13 |
7Q |
3-state latch output |
|
14 |
6Q |
3-state latch output |
|
15 |
5Q |
3-state latch output |
|
16 |
4Q |
3-state latch output |
|
17 |
3Q |
3-state latch output |
|
18 |
2Q |
3-state latch output |
|
19 |
1Q |
3-state latch output |
|
20 |
VCC |
Positive suppy voltage |
Working Principle and Logic Table of the IC
Working with the 74HC573 IC is pretty simple. Let us understand how the IC operates, when the Latch(LE) is HIGH, the Q outputs follows the D inputs, whereas, when the Latch(LE) is LOW, the Q output are latched at the logic levels of input D. The Output Enable(OE’) can be used to place the eight outputs in either a normal logic state (high or low).
The 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.
Below is the truth table, with different input parameters and the output obtained at the Q lines.
Available Packages
PDIP, SOIC, CDIP
Alternatives
SN74AHCT573DWR, CD4099
Applications
Here are some of the applications of the transparent latch IC.
2D Model and Dimensions
Below is the 2D model of the IC, along with its dimensions in inches(millimeters). The following information can be used to design custom footprint of the IC for PCB designing and CAD modelling.
