74ls89 DIP IC

🔹 74LS89 DIP IC – 64-Bit RAM (16×4), Open-Collector Outputs (SN74LS89N)

The 74LS89 is a high-speed, low-power 64-bit Random Access Memory organized as 16 words by 4 bits. It is designed for use as a “scratch pad” memory with non-destructive read-out, featuring open-collector outputs that allow for wired-AND applications and easy memory expansion .

✅ Specifications:

Logic Family: 74LS (Low-Power Schottky TTL)

Package: 16-pin DIP (PDIP)

Memory Organization: 16 words x 4 bits (64 bits total)

Supply Voltage: 5V ± 5%

Operating Mode: Asynchronous

Output Type: Open-Collector, Inverting

Operating Temperature: 0°C to +70°C

Access Time: ~12ns (typical for LS series)

📦 Features:
✔️ 64-bit high-speed Read/Write RAM
✔️ Open-collector outputs for wired-AND applications
✔️ Buffered inputs to minimize loading
✔️ Fully decoded on-chip address inputs
✔️ Inverting data outputs (output is complement of stored data)
✔️ Low-power Schottky design for reduced power consumption

📦 Applications:
✔️ Scratch pad memory in digital systems
✔️ Small buffer or register storage
✔️ Educational digital logic projects (RAM experiments)
✔️ Memory expansion in vintage computing/retro projects