74HC40105 FIFO Storage Register
A versatile FIFO storage register for asynchronous systems
- Supply Voltage: -0.5 to +7V
- Input Clamping Current: 0 to +20mA
- Output Clamping Current: 0 to +20mA
- Output Source or Sink Current: 0 to +25mA
- Supply Current: -50 to +50mA
- Ground Current: -50mA
- Storage Temperature: -65 to +150°C
- Total Power Dissipation: 500mW
- Package Includes: 1 X 74HC40105 IC - (SMD Package) - 4-Bit x 16-Word FIFO Register IC (7440105)
Top Features:
- Independent asynchronous inputs and outputs
- Expandable in either direction
- Reset capability
- Status indicators on inputs and outputs
The 74HC40105 is a first-in/first-out (FIFO) "elastic" storage register that can store 16 4-bit words. It can handle input and output data at different shifting rates, making it ideal as a buffer between asynchronous systems.
Each word position in the register is clocked by a control flip-flop, with a logic 1 indicating filled data and a logic 0 denoting vacancy. The control flip-flop communicates status to the succeeding flip-flop, transferring data and resetting the preceding flip-flop when necessary.
All empty locations automatically move to the input end, while valid data ripples through to the output end. The status of the first control flip-flop (DIR) indicates if the FIFO is full, and the last flip-flop (DOR) shows if the FIFO contains data.
Inputs feature clamp diodes for current limiting resistors to interface with voltages exceeding VCC.
* Images are for illustration only; actual product may vary.