Overview
The 74HCT393DB,112 is a dual 4-bit binary ripple counter integrated circuit produced by NXP USA Inc. (now part of Nexperia). This component is part of the 74HCT series, which is known for its TTL (Transistor-Transistor Logic) compatibility. Each counter in the IC features a clock input, an overriding asynchronous master reset input, and four buffered parallel outputs. The counter advances on the HIGH-to-LOW transition of the clock input, and a HIGH on the master reset input clears the counter stages and forces the outputs LOW, independent of the clock input state.
Key Specifications
| Parameter | Value |
|---|---|
| Type Number | 74HCT393DB |
| Logic Type | Binary Counter |
| Direction | Up |
| Number of Elements | 2 |
| Number of Bits per Element | 4 |
| Reset | Asynchronous |
| Count Rate | 107 MHz |
| Trigger Type | Negative Edge |
| Voltage - Supply | 4.5 V to 5.5 V |
| Operating Temperature | -40°C to 125°C |
| Mounting Type | Surface Mount |
| Package / Case | 14-SSOP (0.209", 5.30mm Width) |
Key Features
- Wide supply voltage range from 4.5 V to 5.5 V, compatible with TTL logic levels.
- CMOS low power dissipation.
- High noise immunity.
- Latch-up performance exceeds 100 mA per JESD 78 Class II Level B.
- Complies with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V).
- ESD protection: HBM (Human Body Model) exceeds 2000 V and CDM (Charged Device Model) exceeds 1000 V.
- Two 4-bit binary counters with individual clocks and master resets.
- Ability to divide by any binary module up to 2^8 in one package.
Applications
The 74HCT393DB is suitable for a variety of digital circuit applications, including:
- Counting and timing circuits.
- Frequency dividers.
- Sequential logic circuits.
- Automotive and industrial control systems.
- Consumer electronics requiring binary counting functions.
Q & A
- What is the primary function of the 74HCT393DB?
The primary function is to act as a dual 4-bit binary ripple counter. - What is the supply voltage range for the 74HCT393DB?
The supply voltage range is from 4.5 V to 5.5 V. - What type of logic levels does the 74HCT393DB support?
The 74HCT393DB supports TTL logic levels. - How many counters are included in the 74HCT393DB?
There are two 4-bit binary counters. - What is the trigger type for the counters in the 74HCT393DB?
The counters are triggered on the negative edge of the clock input. - What is the maximum count rate of the 74HCT393DB?
The maximum count rate is 107 MHz. - Does the 74HCT393DB have ESD protection?
Yes, it has ESD protection exceeding 2000 V for HBM and 1000 V for CDM. - What is the operating temperature range for the 74HCT393DB?
The operating temperature range is from -40°C to 125°C. - What package type is the 74HCT393DB available in?
The 74HCT393DB is available in a 14-SSOP package. - Is the 74HCT393DB compliant with any specific standards?
Yes, it complies with JEDEC standards JESD8C and JESD7A.
