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STMicroelectronics HCF4027BEY
- Part No.:
- HCF4027BEY
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
HCF4027BEY.pdf
- Description:
- IC FF JK TYPE DUAL 1BIT 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,791
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Product details
Overview
HCF4027BEY from STMicroelectronics is a dual J-K master-slave flip-flop in 16-pin DIP package, operating across 3–20 V supply, with static state retention, 16 MHz typical toggle rate at 10 V, and independent asynchronous Set/Reset inputs. It performs synchronous control and register functions in digital timing and sequencing circuits.
For engineers reviewing the HCF4027BEY datasheet, HCF4027BEY pinout, HCF4027BEY application, or HCF4027BEY equivalent, key selection criteria include supply voltage range (3–20 V), propagation delay (45–400 ns depending on VDD and signal path), static operation capability, and dual-channel J-K logic with buffered complementary outputs.
Technical Context
The HCF4027BEY implements two independent CMOS J-K master-slave flip-flops with fully symmetrical output drive, where state transitions occur synchronously on the positive clock edge while Set and Reset override clock action asynchronously. Each channel accepts separate J, K, Clock, Set, and Reset inputs with buffered Q and Q̅ outputs.
It complies with JEDEC JESD13B B-series CMOS specifications, supports wide VDD operation (3–20 V), exhibits input leakage ≤100 nA at 18 V, and delivers noise margins of ≥1 V (at 5 V), ≥2 V (at 10 V), and ≥2.5 V (at 15 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 20 V - enables direct interface with legacy 5 V, industrial 12 V, and high-voltage logic systems without level-shifting. |
| Max Clock Toggle Rate | 16 MHz (typ. at VDD = 10 V) - supports medium-speed digital control loops and counter applications up to ~16 MHz. |
| Propagation Delay (Clock→Q) | 45 ns (min) to 90 ns (max) at VDD = 15 V - defines minimum clock period for reliable state capture in synchronous designs. |
| Input Leakage Current | ±100 nA max at VDD = 18 V - ensures low standby power and stable input biasing in battery-backed or high-impedance circuits. |
| Output Drive (IOH/IOL) | ±3.0 mA (max sink/source at VDD = 15 V) - sufficient to drive multiple CMOS loads or small LED indicators directly. |
| Noise Margin | 2.5 V min at VDD = 15 V - provides robust immunity against supply ripple and crosstalk in noisy industrial environments. |
Pinout & Package
Package: 16-pin plastic DIP (dual in-line package), 0.3-inch width, standard through-hole mounting compatible with legacy PCB layouts and prototyping breadboards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | Q2, Q̅2 | Complementary outputs of second flip-flop - enable direct connection to downstream logic or status indicators without inversion. |
| 3, 6 | K2, J2 | Data inputs for second flip-flop - determine next-state behavior per J-K truth table when clocked. |
| 4, 12 | RESET2, RESET1 | Asynchronous active-high reset - forces Q = 0 regardless of clock or J/K state; critical for power-on initialization. |
| 5, 10 | J1, J2 | Data inputs for first and second flip-flops - define set behavior when clocked; used with K for toggle, latch, or memory functions. |
| 7, 14 | Q̅1, Q1 | Complementary outputs of first flip-flop - provide full state visibility for feedback or monitoring paths. |
| 8 | VSS | Negative supply reference (GND) - common return for all internal circuitry and I/O. |
| 9, 15 | SET1, SET2 | Asynchronous active-high set - forces Q = 1 independently of clock; used for presetting registers or fault recovery. |
| 11, 13 | K1, CLOCK2 | K-input and clock for first and second flip-flops - CLOCK2 (pin 13) triggers second stage; K1 (pin 11) controls reset behavior on clock edge. |
| 16 | VDD | Positive supply rail (3–20 V) - powers entire IC; wide range allows operation across multiple system voltage domains. |
Key Features
| Feature | Design Value |
|---|---|
| Static flip-flop operation | Retains state indefinitely with clock held HIGH or LOW - eliminates need for continuous clocking in hold-mode applications. |
| Independent Set/Reset | Asynchronous, active-high control per channel - enables deterministic initialization and emergency state override without clock dependency. |
| Standardized symmetrical outputs | Matched VOH/VOL and IOH/IOL across Q/Q̅ - simplifies interfacing with downstream CMOS gates and reduces timing skew. |
| 100% quiescent current tested | Guaranteed II ≤ 600 µA at VDD = 20 V - ensures predictable power budgeting in high-voltage standby modes. |
Applications
| Industrial Control Sequencing | Digital Test Equipment |
|---|---|
Use Scenario: Implementing step-by-step machine state machines in PLC I/O modules using discrete logic. IC Role / Device Role / Timing Role: Dual J-K flip-flop providing synchronized, glitch-free state transitions with manual reset for emergency stop. Use Value: Asynchronous Set/Reset allows immediate state override during fault conditions; wide VDD range supports direct 12 V or 24 V system integration. | Use Scenario: Generating precise test patterns and sampling clocks in benchtop logic analyzers. IC Role / Device Role / Timing Role: Edge-triggered storage element capturing signal edges under controlled clock domains. Use Value: 45 ns propagation delay at 15 V enables sub-20 ns timing resolution; symmetrical outputs reduce setup/hold margin uncertainty. |
| Legacy System Repair | Education & Lab Training |
Use Scenario: Replacing obsolete TTL-based counters in vintage instrumentation and telecom hardware. IC Role / Device Role / Timing Role: Pin-compatible upgrade path for 74LS76/74HC76 with lower power and wider supply tolerance. Use Value: 3–20 V operation eliminates need for external regulators; DIP-16 footprint matches original board layout exactly. | Use Scenario: Teaching sequential logic fundamentals in undergraduate digital electronics labs. IC Role / Device Role / Timing Role: Hands-on demonstration of J-K functionality, race condition avoidance, and master-slave isolation. Use Value: Clear truth table and visible Q/Q̅ outputs simplify oscilloscope verification; static operation allows single-step debugging without clock generator. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual J-K flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4027BE | Same pinout and function; higher VIH/VIL thresholds (e.g., VIH = 3.5 V min at 5 V vs. 3.5 V for HCF4027BEY), identical propagation delays. | Compatible in 5 V systems but less tolerant of marginal noise margins at lower VDD; no extended temperature rating (-55°C to +125°C). | Select CD4027BE only for cost-sensitive 5 V commercial designs where extended temp range is unnecessary. |
| 74HC76N | CMOS HC-family; faster (tPLH = 15 ns typ. at 5 V), but narrower VDD (2–6 V), no static hold capability, and non-symmetrical outputs. | Not suitable for >6 V or zero-clock-hold applications; requires external pull-ups for open-drain compatibility; lacks true asynchronous Set/Reset independence. | Choose 74HC76N only for high-speed 5 V logic where propagation delay dominates over supply flexibility and static operation. |
Compared with CD4027BE and 74HC76N, the HCF4027BEY uniquely combines wide-voltage operation (3–20 V), guaranteed static state retention, and full -55°C to +125°C qualification - making it the sole choice for industrial, automotive, and legacy-repair applications demanding robustness and voltage adaptability.
Availability
HCF4027BEY is available at Aetrix Electronics and suitable for industrial control sequencing, digital test equipment, legacy system repair, and education & lab training requiring stable component supply across extended temperature and voltage ranges.
Supply support for HCF4027BEY 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, designing and manufacturing analog, digital, and mixed-signal ICs for industrial, automotive, and consumer markets.
The HCF4027BEY belongs to ST's legacy B-series CMOS logic family, engineered for reliability in harsh environments and long-lifecycle applications including industrial automation and equipment modernization.
FAQ
Is HCF4027BEY pin-compatible with CD4027BE?
Yes - both devices share identical pin assignments, electrical behavior, and functional truth tables. The HCF4027BEY is STMicroelectronics' qualified version of the industry-standard CD4027, with identical DIP-16 footprint and terminal functions including J1/K1/CLOCK1/SET1/RESET1 on pins 10/11/13/9/12 respectively.
What is the minimum clock pulse width required for reliable operation?
At VDD = 15 V, the minimum clock pulse width is 20 ns (high or low time). This value increases to 70 ns at VDD = 5 V. These limits ensure proper master-slave latching and avoid metastability; design must respect tW(Clock) spec per operating voltage.
Can HCF4027BEY operate at 2.5 V supply?
No - the recommended minimum supply voltage is 3 V per JEDEC JESD13B and ST's datasheet. Operation below 3 V risks unreliable state retention, increased propagation delay variation, and failure to meet VIH/VIL thresholds; no characterization data exists below 3 V.
Does HCF4027BEY support simultaneous Set and Reset assertion?
No - asserting both Set and Reset high simultaneously results in an undefined output state (Q and Q̅ may both go high), violating the truth table. The device requires mutually exclusive Set/Reset activation; external logic should prevent concurrent assertion in system design.
HCF4027BEY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 4000B
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Set(Preset) and Reset
- Type:
- JK Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 24 MHz
- Max Propagation Delay @ V, Max CL:
- 90ns @ 15V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 6.8mA, 6.8mA
- Voltage - Supply:
- 3V ~ 20V
- Current - Quiescent (Iq):
- 20 µA
- Input Capacitance:
- 5 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-DIP
HCF4027BEY FAQ
1.How can I place an order for HCF4027BEY through Aetrix?
Please submit a Request for Quotation (RFQ) for HCF4027BEY 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 HCF4027BEY reliable?
The price and inventory of HCF4027BEY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HCF4027BEY is usually 5 days.
3.What payment methods are accepted for HCF4027BEY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HCF4027BEY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HCF4027BEY?
HCF4027BEY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HCF4027BEY 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 HCF4027BEY?
For technical support, including HCF4027BEY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HCF4027BEY requirements.
6.How does Aetrix verify that HCF4027BEY is sourced from the original manufacturer or authorized distributors?
All HCF4027BEY 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 HCF4027BEY meets industry standards.
7.What is the process for return or replacement of HCF4027BEY?
All HCF4027BEY units undergo pre-shipment inspection (PSI). If there is an issue with HCF4027BEY, 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 HCF4027BEY part is unused and in its original packaging.
Return procedure for HCF4027BEY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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