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The HM628128D is a 1-Mbit static RAM organized 131,072k-word × 8-bit. 628128D has higher density, higher performance, and low power consumption by employing CMOS process technology. The HM628128D offers low-power standby power dissipation; therefore, it is suitable for battery backup systems. It has package variations of standard 32-pin plastic DIP, standard 32-pin plastic SOP, and standard 32-pin plastic TSOPI.
628128 Pinout
628128 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | NC | Address Pin 14 |
| 2 | A16 | Address Pin 16 |
| 3 | A14 | Address Pin 14 |
| 4 | A12 | Address Pin 12 |
| 5 | A7 | Address Pin 7 |
| 6 | A6 | Address Pin 6 |
| 7 | A5 | Address Pin 5 |
| 8 | A4 | Address Pin 4 |
| 9 | A3 | Address Pin 3 |
| 10 | A2 | Address Pin 2 |
| 11 | A1 | Address Pin 1 |
| 12 | A0 | Address Pin 0 |
| 13 | I/O 0 | Data Inputs/Outputs 0 |
| 14 | I/O 1 | Data Inputs/Outputs 1 |
| 15 | I/O 2 | Data Inputs/Outputs 2 |
| 16 | VSS | Ground Pin |
| 17 | I/O 3 | Data Inputs/Outputs 3 |
| 18 | I/O 4 | Data Inputs/Outputs 4 |
| 19 | I/O 5 | Data Inputs/Outputs 5 |
| 20 | I/O 6 | Data Inputs/Outputs 6 |
| 21 | I/O 7 | Data Inputs/Outputs 7 |
| 22 | CS’ | Chip Select Pin |
| 23 | A10 | Address Pin 10 |
| 24 | OE’ | Output Enable Pin |
| 25 | A11 | Address Pin 11 |
| 26 | A9 | Address Pin 9 |
| 27 | A8 | Address Pin 8 |
| 28 | A13 | Address Pin 13 |
| 29 | WE’ | Write Enable Pin |
| 30 | CS 2 | Chip Select Pin 2 |
| 31 | A15 | Address Pin 15 |
| 32 | VCC | Power Supply Pin |
628128 Key Feature
- Single 5 V supply: 5 V ± 10%
- Access time: 55 ns/70 ns (max)
- Power dissipation
- Active: 30 mW/MHz (typ)
- Standby: 10 µW (typ)
- Completely static memory.
- No clock or timing strobe required
- Equal access and cycle times
- Common data input and output
- Three state output
- Directly TTL compatible all inputs
- Battery backup operation
- 2 chip selection for battery backup
You can download this datasheet for 628128 128Kx8 CMOS RAM – Datasheet from the link given below:
