Overview
The CD74HC238M96 is a high-speed CMOS logic 3-to-8 line decoder/demultiplexer produced by Texas Instruments. This integrated circuit is designed for applications requiring the selection of one of eight data outputs, making it suitable for memory address decoding or data routing. The device operates within a wide voltage range and offers significant power reduction compared to LSTTL logic ICs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 2 | 6 | V | |
| Input Voltage (VI) | 0 | VCC | V | |
| Output Voltage (VO) | 0 | VCC | V | |
| Temperature Range (TA) | -55 | 125 | °C | |
| Propagation Delay (tpd) at VCC = 5V, CL = 15pF | 13 | 30 | ns | |
| Output Transition Time (tt) at VCC = 5V, CL = 15pF | 15 | 22 | ns | |
| Input Capacitance (Ci) | 10 | pF | ||
| Power Dissipation Capacitance (Cpd) at CL = 15pF | 67 | pF | ||
| Package Type | SOIC-16 |
Key Features
- Select one of eight data outputs: active high for '238.
- Three enable inputs (G2, G1, G0) to simplify cascading and facilitate demultiplexing.
- Typical propagation delay of 13 ns at VCC = 5 V, CL = 15 pF, TA = 25°C.
- Fanout: up to 15 LSTTL loads for bus driver outputs and up to 10 LSTTL loads for standard outputs.
- Wide operating temperature range: -55°C to 125°C.
- Balanced propagation delay and transition times.
- Significant power reduction compared to LSTTL logic ICs.
- HC types: 2 V to 6 V operation, high noise immunity.
- HCT types: 4.5-V to 5.5-V operation, direct LSTTL input logic compatibility.
Applications
- Memory address decoding.
- Data routing applications.
- I/O port or memory selector.
- Demultiplexing functions.
Q & A
- What is the CD74HC238M96 used for? The CD74HC238M96 is used for memory address decoding, data routing, and demultiplexing applications.
- What is the voltage range for the CD74HC238M96? The device operates within a voltage range of 2 V to 6 V.
- What is the typical propagation delay of the CD74HC238M96? The typical propagation delay is 13 ns at VCC = 5 V, CL = 15 pF, and TA = 25°C.
- What are the enable inputs used for in the CD74HC238M96? The three enable inputs (G2, G1, G0) are used to simplify cascading and facilitate demultiplexing.
- What is the operating temperature range of the CD74HC238M96? The device operates within a temperature range of -55°C to 125°C.
- What is the fanout capability of the CD74HC238M96? The device can drive up to 15 LSTTL loads for bus driver outputs and up to 10 LSTTL loads for standard outputs.
- Does the CD74HC238M96 have high noise immunity? Yes, the HC types of the device have high noise immunity.
- What package types are available for the CD74HC238M96? The device is available in SOIC-16, PDIP-16, SOP-16, and TSSOP-16 packages.
- How does the CD74HC238M96 differ from the CD74HC138? The CD74HC238M96 has active high outputs when selected, whereas the CD74HC138 has active low outputs.
- What is the input capacitance of the CD74HC238M96? The input capacitance is approximately 10 pF.
