MCM4164BP15 64Kbit Dynamic RAM IC DIP 16-Pin
The MCM4164BP15 is a Motorola-manufactured commercial‑grade 64 Kbit (65,536 × 1‑bit) dynamic random‑access memory chip. It provides fixed +5.0 V ±10 % single‑supply operation, a maximum access time of 150 ns, and a standard JEDEC DIP‑16 pinout. The device supports page‑mode read/write for faster sequential access and offers TTL‑compatible inputs with three‑state output buffers. It is fully cross‑compatible with the original 4164 family of TTL DRAMs.
Features
- Organized as 65,536 Words of 1 Bit.
- Single +5 V operation (±10 %).
- Maximum access time: 150 ns.
- Low power dissipation: 275 mW maximum (Active) and 22 mW maximum (Standby).
- Three-state data output.
- Internal latches for address and data input.
- Early-write common I/O capability.
- 16K-compatible 128-cycle, 2 ms refresh.
- RAS-only refresh mode.
- CAS-controlled output.
- Upward pin compatibility with 16K RAM (MCM4116, MCM4517).
- Fast page-mode cycle time.
Specifications
ABSOLUTE MAXIMUM RATINGS
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Voltage on Any Pin Relative to VSS (Except VCC) | Vin, Vout | –1 to +7 | V |
| Voltage on VCC Supply Relative to VSS | VCC | –1 to +7 | V |
| Operating Temperature Range | TA | 0 to +70 | °C |
| Storage Temperature Range | Tstg | –55 to +150 | °C |
| Power Dissipation | PD | 600 | mW |
| Data Out Current | Iout | 50 | mA |
RECOMMENDED OPERATING CONDITIONS
| Parameter | Symbol | Min | Typ | Max | Unit | Notes |
|---|---|---|---|---|---|---|
| Supply Voltage (Operating Voltage Range) – VCC | VCC | 4.5 | 5.0 | 5.5 | V | 1 |
| Supply Voltage (Operating Voltage Range) – VSS | VSS | 0 | 0 | 0 | V | 1 |
| Logic 1 Voltage, All Inputs | VIH | 2.4 | — | 6.5 | V | 1 |
| Logic 0 Voltage, All Inputs | VIL | −1.0 | — | 0.8 | V | 1 |
PINOUT
Applications
- Restoration of vintage systems including Commodore 64/C128, Atari 800XL, Apple IIe/c and early Macintosh hardware.
- Teaching and experimentation in microcomputer architecture and DRAM timing.
- Maintenance and repair of electronics projects relying on 4164‑series DRAMs.
- Integration into retro-computing kits, arcade hardware, or bus‑compatible boards.
- Use in vintage memory testers and cross-reference modules.
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