Professional IC Distribution & Technical Solutions

The M74LS643-1P is a 16-bit bus transceiver and register manufactured by MIT (Microelectronics Technology). Below are its specifications, descriptions, and features:

Specifications:

• Manufacturer: MIT (Microelectronics Technology)
• Part Number: M74LS643-1P
• Technology: TTL (Transistor-Transistor Logic)
• Logic Family: 74LS (Low-Power Schottky)
• Package Type: 24-pin DIP (Dual In-line Package)
• Operating Voltage: 5V ±5%
• Operating Temperature Range: 0°C to +70°C
• Propagation Delay: Typically 12ns (max 22ns)
• Output Current (High/Low): -400µA / 8mA
• Power Dissipation: 120mW (typical)

Descriptions:

The M74LS643-1P is a bidirectional 16-bit bus transceiver with 3-state outputs and internal storage registers. It allows data transfer between two bidirectional buses while providing temporary storage. The device features separate control inputs for data flow direction and output enable functions.

Features:

• 16-bit bidirectional bus interface
• Internal storage registers for data latching
• 3-state outputs for bus isolation
• Separate control for data direction (A→B or B→A)
• Output enable control for high-impedance state
• TTL-compatible inputs and outputs
• Low-power Schottky (LS) technology
• Wide operating voltage range (4.75V to 5.25V)

This device is commonly used in microprocessor systems for data buffering and bus interfacing applications.