1. 74HC(HCT)40105 High Speed CMOS Logic 4-Bit x 16-Word FIFO Register
Jeffrey Radaker

2. Features Independent Asynchronous Inputs and Outputs
Expandable in Either Direction
Reset Capability
Status Indicators on Inputs and Outputs
Three-State Outputs
Shift Out Independent of Three-State Control
Balanced Propagation Delay and Transition Times
Significant Power Reduction Compared to LSTTL ICs

3. Pinout 1: Three State Control 2: Data In Ready 3: Shift In
4-7: Data Input (LSB-MSB)
8: Ground
9: Master Reset
10-13: Data Output (MSB-LSB)
14: Data Out Ready
15: Shift Out
16: Supply Voltage

4. Functional Block Diagram

6. Performance
Propagation Time of 180ns from position 1 to Position 16 and Vice Versa
Wide Operating Temperature Range (-55C to 125C)
Supply Voltage Range: 2V to 6V for HC Types, 4.5V to 5.5V for HCT Types
Direct LSTTL Input Logic Compatibility: VIL=0.8V(Max), VIH=2V(Min)

7. Applications Bit-Rate Smoothing CPU/Terminal Buffering
Data Communications
Peripheral Buffering
Line Printer Input Buffers
Auto-Dialers
CRT Buffer Memories
Radar Data Acquisition