74LS189 64-Bit RAM With 3-State Output IC – DIP-16 Package
74LS189 64-Bit RAM With 3-State Output IC – DIP-16 Package The 74LS189 is a high-speed 64-bit RAM organized as a 16-word by 4-bit array. Address inputs are buffered to minimize loading and are fully decoded on-chip. The outputs are 3-state and are in the high impedance state whenever the Chip Select (CS) input is HIGH. The outputs are active only in the Read mode and the output data is the complement of the stored data.
Features:
- 3-State Outputs For Data Bus Applications
- Buffered Inputs Minimize Loading
- Address Decoding On-Chip
- Diode Clamped Inputs Minimize Ringing
Specifications:
| Specification | Value |
|---|---|
| VCC Pin Potential to Ground Pin | -0.5V to +7.0V |
| Input Voltage | -0.5V to +7.0V |
| Input Current | -30mA to +5.0mA |
| Voltage Applied to Output in HIGH State (VCC = 0V) – Standard Output | -0.5V to VCC |
| Voltage Applied to Output in HIGH State (VCC = 0V) – 3-State Output | -0.5V to +5.5V |
| Current Applied to Output in LOW State (Max) | Not specified |
| Supply Voltage | +4.5V to +5.5V |
| Mounting Style | Through-Hole |
| Package/Case | PDIP-16 |
Pinout:
Applications:
- Temporary digital data storage
- Small memory arrays and scratchpad memory
- Digital bus interfacing
- Microprocessor and digital logic systems
- Control and status data storage
- Educational electronics and prototyping
- Legacy computer and arcade hardware repair
Package Included:
- 1 × 74LS189 64-Bit RAM with 3-State Output IC DIP-16.
