MH74188 IC
The MH74188 is a high-speed, bipolar, electrically programmable read-only memory (PROM). It is organized as 32 words of 8 bits each, providing a total capacity of 256 bits. This IC is designed for applications requiring fast access times and reliable permanent data storage, such as constant memories or logic circuit replacements.
✅Features
- Organization: 32 words × 8 bits.
- Output Type: Three-state (3-state) outputs, allowing for easy expansion and bus-oriented applications.
- Input Protection: All inputs are equipped with clamping diodes to minimize line reflections and protect the device.
- Technology: High-speed bipolar integration
📜📚Specifications
| Parameter | Symbol | Value / Range | Unit |
|---|---|---|---|
| Supply Voltage | UCC | 4.75 – 5.25 | V |
| Input Low Voltage | UIL | -0.5 – +0.8 | V |
| Input High Voltage | UIH | +2.0 – +5.5 | V |
| Output Low Current | IOL | max. 12 | mA |
| Output High Voltage | UOH | max. 5.5 | V |
| Access Time (Address) | tAVQV | ≤ 50 | ns |
| Enable Time (Selection) | tSLQL | ≤ 50 | ns |
| Operating Temperature | ϑa | 0 – +70 | °C |
⚓Pin Configuration
| Pin No. | Symbol | Function Description |
|---|---|---|
| 1 – 7 | Q1 – Q7 | Data Outputs (Bits 1-7) |
| 8 | GND | Ground (Negative Supply) |
| 9 | Q8 | Data Output (Bit 8) |
| 10 | A1 | Address Input 1 |
| 11 | A2 | Address Input 2 |
| 12 | A3 | Address Input 3 |
| 13 | A4 | Address Input 4 |
| 14 | A5 | Address Input 5 |
| 15 | S (V) | Selection / Enable Input (Active Low) |
| 16 | VCC | Supply Voltage (+5V) |
💻Applications
- Constant Storage: Ideal for storing fixed data, lookup tables, and mathematical constants.
- Logic Function Generators: Can be programmed to replace complex combinational logic circuits.
- Address Decoding: Useful in microcomputer systems for memory mapping and peripheral selection.
🎁Package Content
- 1 x MH74188 IC