Key facts
- Brand
- Texas Instruments
- Model
- CD54HCT377
- Industry
- Industrial
- Documents
- 3
- Languages
- EN
- Last added
- 2012-06-12
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TEXAS INSTRUMENTS CD54HC377 CD74HC377 CD54HCT377 CD74HCT377 Data Sheet
This document is a datasheet for the CD54HC377, CD74HC377, CD54HCT377, and CD74HCT377 integrated circuits. These devices are high-speed CMOS logic octal D-type flip-flops featuring a buffered common clock input that loads all eight flip-flops simultaneously on the positive edge of the clock when the Data Enable (E) is Low.
The datasheet provides detailed electrical specifications for both HC types (operating from 2V to 6V) and HCT types (compatible with LSTTL inputs, operating from 4.5V to 5.5V). It includes absolute maximum ratings, DC electrical characteristics such as input/output voltages and leakage currents, switching parameters like propagation delay and clock frequency limits, and thermal information for various package types including CERDIP, PDIP, SOIC, and TSSOP.
Texas Instruments CD54HCT377 specifications
| Supply Voltage Range (HC Types) | 2V to 6V |
|---|---|
| Supply Voltage Range (HCT Types) | 4.5V to 5.5V |
| Typical Propagation Delay (HC Types, CL=15pF) | 14ns |
| Typical Propagation Delay (HCT Types, CL=15pF) | 16 ns |
| Fanout over Temperature Range | 10 LSTTL Loads |
| Maximum Clock Frequency (HCT Types, Vcc=4.5V) | 25 MHz |
| Input Capacitance (CL = 50pF) | 10 pF |
Source: TEXAS INSTRUMENTS CD54HC377 CD74HC377 CD54HCT377 CD74HCT377 Data Sheet
All Texas Instruments CD54HCT377 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What is the logic function of these flip-flops?
The flip-flops are loaded simultaneously on the positive edge of the clock (CP) when the Data Enable (E) is Low.
From: TEXAS INSTRUMENTS CD54HC377 CD74HC377 CD54HCT377 CD74HCT377 Data Sheet
Are HCT types compatible with TTL inputs?
Yes, HCT types have direct LSTTL input logic compatibility.
From: TEXAS INSTRUMENTS CD54HC377 CD74HC377 CD54HCT377 CD74HCT377 Data Sheet
How do these flip-flops load data?
All flip-flops are loaded simultaneously on the positive edge of the clock when the Data Enable is Low.
What is the typical propagation delay for HC types?
The typical propagation delay at Vcc = 5V and Ta = 25°C is 14ns.