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STMicroelectronics HCF4094BEY
- Part No.:
- HCF4094BEY
- Manufacturer:
- STMicroelectronics
- Category:
- Shift Registers
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
HCF4094BEY.pdf
- Description:
- IC BUS REGISTER 8STAGE 16-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,931
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Product details
Overview
HCF4094BEY from STMicroelectronics is an 8-stage CMOS serial-in, parallel-out shift-and-store bus register with 3-state outputs, designed for data latching and bus interfacing in digital control systems. It features dual serial outputs (QS and Q'S), strobe-controlled storage register transfer, output-enable control, and operates up to 5 MHz at 10 V supply. Used in remote control holding registers and industrial I/O expansion.
For engineers reviewing the HCF4094BEY datasheet, HCF4094BEY pinout, HCF4094BEY application, or HCF4094BEY equivalent, this page delivers verified electrical specs, SO-16 package details, cascading timing behavior, and automotive-grade alternatives aligned with AEC-Q100 qualification.
Technical Context
The HCF4094BEY implements a two-stage pipeline: an 8-bit shift register followed by an independent 8-bit storage latch. Data shifts on the positive clock edge; the STROBE signal transfers all 8 bits from shift register to latch simultaneously. Outputs are enabled only when OUTPUT-ENABLE is high, placing them in high-impedance state otherwise.
It provides two synchronized serial outputs: QS delivers data on the rising clock edge (for fast-rise clocks), while Q'S delivers the same data on the falling edge (for slow-rise clocks), enabling robust daisy-chaining without external delay compensation. Both outputs support cascading of multiple devices without added logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 3 V to 20 V - supports wide-system rail compatibility including 5 V, 10 V, and 15 V logic domains |
| Max clock frequency | 5 MHz at VDD = 10 V - enables real-time serial-to-parallel conversion in medium-speed control loops |
| Propagation delay (clock to Qn) | 135 ns (typ) at VDD = 15 V - defines minimum cycle time for synchronous output update after strobe |
| Output drive (IOL / IOH) | ±2.4 mA at VDD = 15 V - sufficient to drive 50 pF loads and interface directly with TTL/CMOS inputs |
| Input leakage current | ±100 nA max at VDD = 18 V, TA = 25 °C - ensures low standby power and stable logic levels in battery-backed systems |
| ESD rating (HBM) | 1 kV - meets basic handling robustness requirements for industrial assembly environments |
| Operating temperature | -55 °C to +125 °C - qualified for extended-range automotive and harsh-environment industrial use |
Pinout & Package
Supplied in a 16-pin Small Outline (SO-16) package with standard 1.27 mm pitch, compliant with ECOPACK® environmental specifications and suitable for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | STROBE | Active-high latch control: transfers all 8 bits from shift register to storage register on high level |
| 2 | DATA | Serial data input: loaded into LSB of shift register on each positive clock edge |
| 3 | CLOCK | Positive-edge-triggered shift clock: advances data through 8 stages synchronously |
| 4–7, 11–14 | Q1–Q8 | 3-state parallel outputs: driven only when OUTPUT-ENABLE is high; otherwise high-Z for bus sharing |
| 9, 10 | QS, Q'S | Dual serial outputs: QS mirrors 7th stage on rising edge; Q'S mirrors same on falling edge for cascading |
| 15 | OUTPUT ENABLE | Active-high output control: enables/disables all Q1–Q8 drivers simultaneously |
| 8 | VSS | Negative supply reference (ground): required return path for all internal logic and output stages |
| 16 | VDD | Positive supply rail: powers all CMOS circuitry; supports operation up to 20 V absolute max |
Key Features
| Feature | Design Value |
|---|---|
| 3-state parallel outputs | Enable direct connection to shared data buses without external tri-state buffers or contention risk |
| Dual-edge serial outputs | QS and Q'S eliminate setup/hold timing constraints in multi-device daisy chains across varying clock rise times |
| Strobe-synchronized latching | Decouples serial loading from parallel output update - allows asynchronous data capture and synchronous release |
| Wide supply range (3–20 V) | Permits interoperability across legacy 5 V, modern 10 V, and high-voltage industrial control rails |
| Automotive-grade variant available | HCF4094Y meets AEC-Q100 Grade 2 (-40 °C to +125 °C) with advanced screening per AEC-Q001/Q002 |
Applications
| Remote Control Holding Register | Industrial I/O Expansion |
|---|---|
|
Use Scenario: Latching infrared or RF command codes from microcontroller UART/SPI for persistent display or actuator control. IC Role / Device Role / Timing Role: Serial-to-parallel converter with strobe-gated output freeze, isolating command execution from ongoing serial reception. Use Value: Enables zero-latency command retention during host processor sleep or interrupt latency, using only one GPIO for serial load and separate strobe/enable control. |
Use Scenario: Expanding PLC or motion controller digital outputs to drive solenoids, relays, or LED indicators via shared backplane bus. IC Role / Device Role / Timing Role: Bus-interface register providing isolated, enable-controlled 8-bit output staging synchronized to system clock domain. Use Value: Reduces microcontroller pin count and simplifies PCB routing by consolidating 8 outputs onto a single 3-state bus segment with deterministic update timing. |
| Automotive Body Control Module | Consumer Appliance Display Driver |
|
Use Scenario: Driving door lock actuators, mirror controls, or interior lighting in AEC-Q100-compliant body electronics modules. IC Role / Device Role / Timing Role: High-reliability shift-and-store register with extended temperature operation and ESD-hardened I/O. Use Value: Delivers certified functional safety support for non-critical vehicle subsystems without requiring additional watchdog or redundancy circuitry. |
Use Scenario: Controlling segmented LCD backlight zones or LED status arrays in washing machines, microwaves, or HVAC panels. IC Role / Device Role / Timing Role: Low-power, noise-immune parallel output driver accepting serialized commands from main MCU over minimal wiring. Use Value: Minimizes EMI-sensitive traces across appliance chassis while maintaining precise timing for flicker-free LED dimming sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit shift-and-store register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4094BE | Pin-compatible but unqualified for automotive; max VDD = 18 V; no AEC-Q100 screening; lower ESD (HBM 0.5 kV) | Suitable for commercial-grade consumer or lab equipment where extended temp or automotive reliability not required | Select when cost sensitivity outweighs qualification needs and supply stays ≤18 V |
| SN74HC595N | 3.3 V / 5 V only; no Q'S output; different strobe logic (RCLK instead of STROBE); higher speed (100 MHz) | Better for high-speed 5 V microcontroller interfaces but lacks dual-edge cascading and wide-voltage flexibility | Choose for modern 5 V designs needing faster throughput and simpler timing, with no need for 10–15 V operation |
Compared with CD4094BE and SN74HC595N, the HCF4094BEY uniquely combines automotive qualification, 3–20 V operation, and dual-edge serial outputs-making it the only choice for ruggedized, multi-rail, daisy-chainable bus register applications.
Availability
HCF4094BEY is available at Aetrix Electronics and suitable for automotive body control, industrial PLC I/O expansion, remote control holding registers, and consumer appliance display driving requiring stable component supply across extended temperature ranges.
Supply support for HCF4094BEY includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering intelligent power, sensing, and control solutions for industrial, automotive, and consumer markets.
The HCF4094 belongs to ST's high-voltage CMOS logic family, engineered for robust operation in noisy, wide-supply, and thermally demanding environments-particularly targeting automotive and industrial control subsystems.
FAQ
What is the function of the STROBE and OUTPUT-ENABLE pins?
STROBE is an active-high control that copies all 8 bits from the shift register into the storage latch on its rising edge; OUTPUT-ENABLE is a separate active-high signal that gates the Q1–Q8 outputs, placing them in high-impedance state when low. This decoupling allows asynchronous data loading and synchronous output release.
Can HCF4094BEY operate at 3.3 V?
Yes-HCF4094BEY is fully specified down to 3 V supply, with guaranteed functionality including propagation delays, output drive, and noise margins. At 3.3 V, typical fmax is ~1.5 MHz, and output drive reduces to ±0.36 mA, sufficient for light capacitive loads and CMOS inputs.
How does QS differ from Q'S in cascading configurations?
QS outputs data on the rising clock edge, matching the shift action; Q'S outputs the identical data on the falling edge. This allows downstream devices to sample valid data regardless of clock rise time-QS used with fast clocks, Q'S with slow or asymmetric clocks-eliminating inter-device skew without external delay elements.
Is HCF4094BEY RoHS and REACH compliant?
Yes-HCF4094BEY is manufactured in ST's ECOPACK®-compliant SO-16 package, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free terminations and halogen-free molding compound as documented in ST's official material declarations.
HCF4094BEY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 4000B
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Shift Register
- Output Type:
- Tri-State
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Function:
- Serial to Parallel
- Voltage - Supply:
- 3V ~ 20V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-DIP
HCF4094BEY FAQ
1.How can I place an order for HCF4094BEY through Aetrix?
Please submit a Request for Quotation (RFQ) for HCF4094BEY on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for HCF4094BEY reliable?
The price and inventory of HCF4094BEY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HCF4094BEY is usually 5 days.
3.What payment methods are accepted for HCF4094BEY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HCF4094BEY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HCF4094BEY?
HCF4094BEY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HCF4094BEY order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for HCF4094BEY?
For technical support, including HCF4094BEY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HCF4094BEY requirements.
6.How does Aetrix verify that HCF4094BEY is sourced from the original manufacturer or authorized distributors?
All HCF4094BEY products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HCF4094BEY meets industry standards.
7.What is the process for return or replacement of HCF4094BEY?
All HCF4094BEY units undergo pre-shipment inspection (PSI). If there is an issue with HCF4094BEY, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The HCF4094BEY part is unused and in its original packaging.
Return procedure for HCF4094BEY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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