CD4094BCN

Shift Registers Overview

The CD4094BCN is an 8-bit shift register and latch with 3-STATE outputs manufactured by Fairchild Semiconductor. It operates on a supply voltage range of 3.0V to 15VDC, with absolute maximum ratings up to 18VDC. The device features high noise immunity (0.45 VDD typical) and low power TTL compatibility, providing a fan-out of 2 for 74L or 1 for 74LS logic families. Data shifts serially on the positive clock transition, while latching occurs on the negative edge of the STROBE input. The package is a 16-Lead Plastic Dual-In-Line (PDIP).

Shift Registers Feature Summary

• Integrates an 8-bit shift register and a 3-STATE 8-bit latch within a single CMOS circuit.
• Provides cascading capability through dedicated serial data output pins (QS and Q'S).
• Features 3-STATE parallel outputs controlled by an OUTPUT ENABLE pin for bus interfacing.

Shift Registers Applications

• Serial-to-parallel data conversion in digital systems.
• Cascaded expansion of I/O ports using multiple units.
• Display driver interfaces requiring latch control.

Shift Registers Procurement Notes

Verify that the ordering code matches the specific package type required, as the CD4094BC series includes both PDIP (CD4094BCN) and SOIC (CD4094BCWM) variants. Confirm the manufacturer origin, as this component was originally produced by Fairchild Semiconductor and may now be distributed under other entities following corporate acquisitions. Ensure the application environment stays within the recommended operating temperature range of -55°C to +125°C.

Shift Registers Selection Notes

Select the CD4094BCN when an 8-bit serial-in/parallel-out configuration with latched outputs is required. The 3-STATE output feature makes it suitable for multiplexed bus applications where multiple devices share data lines. Consider the wide supply voltage range (3V–15V) for compatibility with various logic levels. Verify that the propagation delays meet the timing requirements of the system clock frequency.

Shift Registers Part Context

The CD4094BC belongs to the 4000-series CMOS logic family, known for wide voltage operation and low power consumption. This specific part functions as a shift-and-store register, distinct from simple shift registers like the CD4094B without latches or standard buffers. It serves as a bridge between serial communication protocols and parallel peripheral control.

Shift Registers Replacement Considerations

Equivalent functional parts include the CD4094BMS and CD4094BCWM, which offer identical electrical characteristics but differ in physical packaging (SOIC vs. PDIP). Cross-reference with other manufacturers' 8-bit shift registers/latches with 3-STATE outputs if pinout compatibility is not strictly required.