UM6532 RAM I/O Timer IC 5V 40mA DIP-40
The UM6532 RAM I/O Timer IC is a multifunction integrated circuit designed to provide essential peripheral support for early microprocessor-based systems. Known as a RIOT (RAM, Input/Output, Timer) chip, it integrates static RAM memory, programmable input/output ports, and a programmable timer within a single DIP-40 package. This combination allows designers to reduce the number of external components required in microcontroller and microprocessor circuits.
The UM6532 is widely used in vintage computing systems and embedded control applications where compact system architecture and efficient resource integration are required. With built-in memory and programmable I/O lines, the device can directly interface with sensors, switches, displays, and other digital peripherals while the internal timer provides precise timing and interrupt control for system operations.
Features:
- Integrated RAM, I/O ports, and timer in a single IC.
- Static RAM memory for data storage.
- Two programmable parallel I/O ports.
- Built-in programmable timer.
- Compatible with early microprocessor systems.
- Reduces external component count in embedded designs.
- Standard DIP-40 through-hole package for easy PCB mounting.
Specifications:
| Parameter | Value |
|---|---|
| IC Type | RAM I/O Timer (RIOT) |
| RAM Capacity | 128 Bytes |
| I/O Ports | 2 × 8-bit Parallel Ports |
| Timer Type | Programmable Timer |
| Supply Voltage | 5V |
| Supply Current | 40mA |
| Technology | NMOS |
| Package Type | DIP-40 |
| Operating Temperature | 0°C to +70°C |
Pinout:
| Pin | Symbol | Description | Pin | Symbol | Description |
| 1 | Vss | Ground | 40 | A6 | Address Input |
| 2 | A5 | Address Input | 39 | phi 2 | Phase 2 Clock Input |
| 3 | A4 | Address Input | 38 | CS1 | Chip Select 1 (High) |
| 4 | A3 | Address Input | 37 | CS2 | Chip Select 2 (Low) |
| 5 | A2 | Address Input | 36 | RS | Register Select |
| 6 | A1 | Address Input | 35 | R/W | Read/Write Control |
| 7 | A0 | Address Input | 34 | RES | Reset (Low) |
| 8 | PA0 | Port A I/O | 33 | D0 | Data Bus Bit 0 |
| 9 | PA1 | Port A I/O | 32 | D1 | Data Bus Bit 1 |
| 10 | PA2 | Port A I/O | 31 | D2 | Data Bus Bit 2 |
| 11 | PA3 | Port A I/O | 30 | D3 | Data Bus Bit 3 |
| 12 | PA4 | Port A I/O | 29 | D4 | Data Bus Bit 4 |
| 13 | PA5 | Port A I/O | 28 | D5 | Data Bus Bit 5 |
| 14 | PA6 | Port A I/O | 27 | D6 | Data Bus Bit 6 |
| 15 | PA7 | Port A I/O | 26 | D7 | Data Bus Bit 7 |
| 16 | PB7 | Port B I/O | 25 | IRQ | Interrupt Request |
| 17 | PB6 | Port B I/O | 24 | PB0 | Port B I/O |
| 18 | PB5 | Port B I/O | 23 | PB1 | Port B I/O |
| 19 | PB4 | Port B I/O | 22 | PB2 | Port B I/O |
| 20 | Vcc | +5V Power | 21 | PB3 | Port B I/O |
Applications:
- Microprocessor support systems.
- Embedded control circuits.
- Vintage computer hardware designs.
- Industrial control electronics.
- Digital interface and timing applications.
Package Included:
- 1x UM6532 RAM I/O Timer IC 5V 40mA DIP-40.
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