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STMicroelectronics HCF4050BEY
- Part No.:
- HCF4050BEY
- Manufacturer:
- STMicroelectronics
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
HCF4050BEY.pdf
- Description:
- IC BUFFER NON-INVERT 20V 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,693
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Product details
Overview
HCF4050BEY from STMicroelectronics is a non-inverting hex buffer/level converter in 16-pin DIP package, designed for CMOS-to-DTL/TTL logic level translation using a single supply (3–20 V). It supports VIH up to 18 V exceeding VDD, delivers ±3.2 mA output drive at 5 V, and achieves 40 ns typical propagation delay at 10 V with 50 pF load.
For engineers reviewing the HCF4050BEY datasheet, HCF4050BEY pinout, HCF4050BEY application, or HCF4050BEY equivalent, key selection factors include its high-voltage-tolerant inputs, rail-to-rail output swing, guaranteed quiescent current up to 20 V, and compatibility with mixed-voltage interface bridging in industrial control and legacy system upgrades.
Technical Context
The HCF4050BEY implements six independent CMOS buffer stages with high-impedance inputs and push-pull outputs, enabling unidirectional level shifting without external biasing. Its input structure tolerates DC voltages up to 18 V regardless of VDD, allowing direct interfacing between higher-voltage sensors or legacy logic and lower-voltage microcontrollers.
Each channel provides symmetrical sourcing/sinking capability (±3.2 mA at VDD = 5 V), meets JEDEC JESD13B B-series specifications, and maintains noise margins ≥1 V (at 5 V), ≥2 V (at 10 V), and ≥2.5 V (at 15 V) across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 3 V to 20 V - supports wide-supply industrial and battery-backed systems |
| tPD (Typ.) | 40 ns at VDD = 10 V, CL = 50 pF - enables reliable 10 MHz operation in timing-critical interfaces |
| VIH Max | 18 V - allows input signals exceeding VDD for mixed-voltage domain bridging |
| IOL / IOH | 3.2 mA / –0.42 mA at VDD = 5 V - drives two standard TTL loads directly |
| II (Max) | 100 nA at VDD = 18 V, TA = 25°C - ensures minimal loading on high-impedance sources |
| VIH / VIL | 3.5 V / 1.5 V at VDD = 5 V - provides robust noise immunity with 1 V margin |
| Operating Temp | –55°C to +125°C - qualified for extended-temperature industrial and automotive under-hood use |
Pinout & Package
Package: 16-pin plastic DIP (0.300" width), JEDEC MS-001, body dimensions 20.0 × 6.5 × 3.3 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 7, 9, 11 | Data Inputs A–F | High-impedance CMOS inputs tolerant to 18 V, independent of VDD |
| 2, 4, 6, 10, 12, 15 | Data Outputs G–L | Push-pull outputs delivering rail-to-rail swing and ±3.2 mA drive at 5 V |
| 8 | VSS | Ground reference terminal; all voltages referenced to this pin |
| 16 | VDD | Positive supply input; powers all six buffers; range 3–20 V |
| 13, 14 | NC | No internal connection; must be left unconnected or tied to VSS/VDD per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply level translation | Converts 18 V logic down to 5/10/15 V domains without dual supplies or resistive dividers |
| Guaranteed IQ test | 100% tested quiescent current ≤60 µA at VDD = 15 V, ensuring low-power standby integrity |
| JEDEC JESD13B compliance | Fully conforms to B-series CMOS device standards for interoperability and reliability |
| Rail-to-rail output swing | VOH ≥ 4.95 V and VOL ≤ 0.05 V at VDD = 5 V - eliminates need for pull-up resistors in TTL loads |
Applications
| Industrial PLC I/O Expansion | Legacy System Voltage Interface |
|---|---|
Use Scenario: Interfacing 12 V sensor outputs to a 5 V microcontroller ADC or GPIO bank. IC Role / Device Role / Timing Role: Non-inverting level translator buffering and voltage domain isolation. Use Value: Eliminates external resistor dividers while maintaining signal integrity and noise margin ≥2 V at 10 V VDD. | Use Scenario: Connecting vintage TTL-based instrumentation (e.g., GPIB peripherals) to modern CMOS controllers. IC Role / Device Role / Timing Role: CMOS-to-TTL logic level converter with direct TTL load driving capability. Use Value: Drives two standard TTL loads (IOL ≥ 3.2 mA) without additional drivers, reducing board space and BOM count. |
| Mixed-Voltage Microcontroller Peripherals | Automotive Body Control Module |
Use Scenario: Isolating 3.3 V MCU GPIOs from 5 V display backlight control or keypad scan lines. IC Role / Device Role / Timing Role: Unidirectional buffer preventing backfeed and enabling safe voltage translation. Use Value: Input tolerance up to 18 V protects MCU pins during hot-swap or fault conditions in shared bus environments. | Use Scenario: Signal conditioning for 12 V battery-sensed inputs (e.g., door switch, lamp status) feeding a 5 V CAN node MCU. IC Role / Device Role / Timing Role: Robust input buffer with –55°C to +125°C operation and low leakage (≤100 nA). Use Value: Ensures reliable sensing over full automotive temperature range without calibration drift from input bias current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar non-inverting level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4050BE | Same pinout and function but not 100% IQ-tested; VIH max = 15 V (vs. 18 V) | Limited to ≤15 V input translation; less suitable for 18 V sensor interfaces | Prefer HCF4050BEY where input overvoltage tolerance or production IQ assurance is required |
| MC14504BDR2G | Hex non-inverting buffer with identical VDD range but higher tPD (60 ns typ. at 10 V) | Lower speed margin; not recommended for >8 MHz clock/data paths | Acceptable for static control signals, but HCF4050BEY preferred for data strobes or serial timing |
Compared with CD4050BE and MC14504BDR2G, the HCF4050BEY offers superior input voltage tolerance (18 V), guaranteed quiescent current testing, and faster propagation (40 ns vs. ≥60 ns), making it optimal for high-reliability mixed-voltage digital interconnects.
Availability
HCF4050BEY is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy system voltage interface, and automotive body control modules requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for HCF4050BEY 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, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The HCF4050BEY belongs to ST's legacy B-series CMOS logic family, engineered specifically for robust, single-supply level translation in mixed-voltage embedded systems with demanding environmental and reliability requirements.
FAQ
Can HCF4050BEY translate 18 V inputs to 3.3 V logic levels?
No - the HCF4050BEY outputs swing rail-to-rail relative to VDD. To obtain 3.3 V logic levels, VDD must be set to 3.3 V. Its input tolerance (up to 18 V) allows accepting 18 V signals while powered from 3.3 V, but output high level will be ~3.3 V, not 18 V. This enables safe interfacing without level-shifting components.
Is HCF4050BEY pin-compatible with CD4050BE?
Yes - both devices share identical pinout (16-pin DIP), truth table, and functional behavior. However, HCF4050BEY features tighter VIH specification (18 V vs. 15 V), 100% IQ testing, and improved dynamic performance (40 ns vs. 60 ns typical tPD at 10 V), making it a drop-in upgrade where enhanced specs are needed.
What is the maximum capacitive load the HCF4050BEY can drive reliably?
The HCF4050BEY is characterized up to 50 pF (tPD, transition times), and its output stage supports ≥100 pF with acceptable timing degradation. For loads >100 pF, series termination or reduced edge rate may be required. Layout best practice recommends minimizing trace length and avoiding stubs to preserve signal integrity at 10 MHz operation.
Does HCF4050BEY require external pull-up or pull-down resistors on inputs or outputs?
No - inputs are CMOS high-impedance with defined VIH/VIL thresholds; outputs are push-pull and rail-to-rail. Pull-ups are unnecessary for TTL compatibility (VOL ≤ 0.05 V, VOH ≥ 4.95 V at 5 V). Floating inputs must be avoided; unused channels should tie inputs to VDD or VSS to prevent oscillation and excess current draw.
HCF4050BEY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 4000B
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 6
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- Push-Pull
- Current - Output High, Low:
- 12mA, 48mA
- Voltage - Supply:
- 3V ~ 20V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-DIP
HCF4050BEY FAQ
1.How can I place an order for HCF4050BEY through Aetrix?
Please submit a Request for Quotation (RFQ) for HCF4050BEY 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 HCF4050BEY reliable?
The price and inventory of HCF4050BEY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HCF4050BEY is usually 5 days.
3.What payment methods are accepted for HCF4050BEY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HCF4050BEY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HCF4050BEY?
HCF4050BEY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HCF4050BEY 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 HCF4050BEY?
For technical support, including HCF4050BEY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HCF4050BEY requirements.
6.How does Aetrix verify that HCF4050BEY is sourced from the original manufacturer or authorized distributors?
All HCF4050BEY 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 HCF4050BEY meets industry standards.
7.What is the process for return or replacement of HCF4050BEY?
All HCF4050BEY units undergo pre-shipment inspection (PSI). If there is an issue with HCF4050BEY, 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 HCF4050BEY part is unused and in its original packaging.
Return procedure for HCF4050BEY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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