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onsemi MC14503BCPG
- Part No.:
- MC14503BCPG
- Manufacturer:
- onsemi
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MC14503BCPG.pdf
- Description:
- IC BUFFER NON-INVERT 18V 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,953
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Product details
Overview
MC14503BCPG from ON Semiconductor is a hex non-inverting 3-state buffer IC with dual independent disable controls, 3.0–18 V supply range, ±25 mA output drive, and TTL-compatible logic interface - used in bus-oriented digital systems requiring selective signal gating across six channels.
For engineers reviewing the MC14503BCPG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, PDIP-16 package mapping, real-world bus-buffing use cases, and two validated alternative parts for industrial control and legacy CMOS/TTL interface design.
Technical Context
The MC14503BCPG implements six independent non-inverting buffers, each with high-impedance (3-state) outputs controlled by two separate disable inputs: Disable A (pins 1 & 2) enables high-Z for outputs 1–4, while Disable B (pin 15) controls outputs 5–6. Its CMOS input structure supports wide-voltage operation and TTL-level compatibility over full temperature range.
Each buffer provides symmetrical sourcing and sinking capability up to ±25 mA per pin at VDD = 15 V, with propagation delays ranging from 25 ns (typ.) to 150 ns (max.) depending on supply voltage and load. The device features diode-protected inputs and requires all unused inputs tied to VSS or VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 Vdc to 18 Vdc - supports direct interfacing with 5 V TTL, 12 V industrial logic, and 15 V legacy systems without level shifters. |
| Output Drive Current | ±25 mA sink/source per pin at VDD = 15 V - sufficient to drive one standard TTL load across full −55°C to +125°C operating range. |
| 3-State Propagation Delay | tPHZ/tPLZ ≤ 160 ns max at VDD = 15 V - ensures deterministic bus release timing during multi-channel enable/disable sequencing. |
| Input Voltage Thresholds | VIL ≤ 4.0 V, VIH ≥ 11 V at VDD = 15 V - provides robust noise margin (>3.5 V) in noisy industrial environments. |
| Quiescent Supply Current | ≤ 120 µA at VDD = 15 V - enables low-static-power operation in battery-backed or energy-sensitive applications. |
| Operating Temperature | −55°C to +125°C - qualified for under-hood automotive, military, and industrial control applications. |
| Package Type | PDIP-16 (Case 648), Pb-free - through-hole mounting compatible with wave soldering and legacy PCB assembly processes. |
Pinout & Package
MC14503BCPG uses a 16-pin plastic dual in-line package (PDIP-16, Case 648), with 0.3-inch body width and standard 0.1-inch lead pitch. Pin 1 is located at the left end of the top row (notch-down orientation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | Disable A Input | Active-high control enabling high-impedance state for outputs OUT1–OUT4; allows partial bus isolation. |
| 3, 4, 5, 6, 7, 9 | Input 1–6 (IN1–IN6) | CMOS-compatible buffered inputs; require external tie to VSS/VDD if unused. |
| 8 | VSS | Ground reference for all internal circuitry and I/O; must be low-impedance connection. |
| 10, 11, 12, 13, 14, 16 | Output 1–6 (OUT1–OUT6) | Non-inverting 3-state outputs; capable of ±25 mA drive into resistive or capacitive loads. |
| 15 | Disable B Input | Active-high control enabling high-impedance state only for OUT5 and OUT6 - enables fine-grained channel grouping. |
| 16 | VDD | Positive supply rail (3.0–18 V); decoupling capacitor recommended near pin for transient immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state controls | Separate Disable A (OUT1–OUT4) and Disable B (OUT5–OUT6) allow asymmetric bus partitioning in multi-peripheral systems. |
| TTL-compatible input thresholds | Guaranteed VIH ≥ 3.5 V and VIL ≤ 1.5 V at VDD = 5 V - eliminates need for external level translators when interfacing with 74LS/74HC families. |
| Wide supply voltage operation | Functional from 3.0 V to 18 V - supports mixed-voltage backplanes and brown-out tolerant designs without auxiliary regulators. |
| High-current output stage | ±25 mA per output at 15 V - drives long traces, multiple TTL inputs, or small relays directly without external drivers. |
| Pb-free PDIP packaging | RoHS-compliant lead finish with standard JEDEC PDIP-16 footprint - drop-in replacement for legacy MC14503BCP assemblies. |
Applications
| Industrial Bus Interface | Legacy System Upgrade |
|---|---|
Use Scenario: Isolating microcontroller GPIO lines from shared RS-485 transceiver control bus in programmable logic controllers. IC Role / Device Role: Hex buffer providing direction-controlled signal routing and contention prevention via Disable A/B sequencing. Use Value: Enables single MCU port to manage six discrete enable signals while preventing bus conflicts during firmware updates. |
Use Scenario: Replacing obsolete 74C97 in aging test equipment where 3-state bus arbitration remains critical. IC Role / Device Role: Pin-compatible non-inverting buffer with enhanced drive strength and extended temperature range. Use Value: Eliminates need for redesign or requalification by maintaining identical pinout and logic behavior with improved reliability. |
| Multiplexed Display Driver | Automotive Sensor Hub |
Use Scenario: Driving segment lines of a 6-digit multiplexed LED display from a low-drive microcontroller. IC Role / Device Role: Output buffering and current boosting for common-anode digit selection and segment activation. Use Value: Delivers consistent brightness across all digits using single-chip solution with per-digit disable control. |
Use Scenario: Conditioning analog sensor signals (e.g., pressure, temp) before ADC sampling in engine control units. IC Role / Device Role: Signal conditioning interface between high-noise sensor harnesses and low-voltage ADC inputs. Use Value: Provides ESD-protected, high-impedance buffering with rail-to-rail supply tolerance for harsh under-hood environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex non-inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD40109BE | Quad non-inverting buffer with level-shifting capability (VCC1/VCC2), lower drive (±8 mA), no dual-disable feature. | Suitable for bidirectional voltage translation but lacks independent channel disable controls required for bus arbitration. | Select when level shifting between 3.3 V and 5 V domains is needed; not suitable for MC14503BCPG's dual-disable bus gating function. |
| SN74HC244N | Octal non-inverting buffer with single active-low OE, 74HC logic family, 6 V max supply, ±25 mA drive. | Higher pin count, different disable polarity, and narrower supply range limit drop-in use in 12–15 V systems. | Prefer for new 5 V-only designs needing higher channel count; requires layout change and logic inversion in enable path. |
Compared with CD40109BE and SN74HC244N, the MC14503BCPG uniquely combines dual-disable control, 18 V operation, and legacy PDIP compatibility - making it irreplaceable in field-upgraded industrial controllers where partial bus isolation and wide-voltage resilience are mandatory.
Availability
MC14503BCPG is available at Aetrix Electronics and suitable for industrial bus interface, legacy system upgrade, multiplexed display driver, and automotive sensor hub applications requiring stable component supply and long-term obsolescence management.
Supply support for MC14503BCPG 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
ON Semiconductor (now part of onsemi) is a global semiconductor manufacturer specializing in power management, analog, sensors, and logic solutions for automotive, industrial, and cloud infrastructure markets.
The MC14503BCPG belongs to the legacy MC145xx CMOS logic family, designed specifically for robust, wide-supply-voltage digital interfacing in harsh environments - emphasizing reliability, interoperability with TTL, and long-lifecycle support.
FAQ
What is the maximum supply voltage rating for MC14503BCPG?
The MC14503BCPG has an absolute maximum DC supply voltage (VDD) of +18.0 Vdc, with recommended operating range from 3.0 Vdc to 18.0 Vdc. Operation beyond 18.0 Vdc risks permanent damage. At 15 Vdc, the device delivers its full ±25 mA output drive capability while maintaining guaranteed timing performance across −55°C to +125°C.
Does MC14503BCPG support true TTL input compatibility across temperature?
Yes, the MC14503BCPG is explicitly specified to drive one standard TTL load over its full operating temperature range (−55°C to +125°C). Its input thresholds (VIH ≥ 3.5 V, VIL ≤ 1.5 V at VDD = 5 V) and output voltage levels (VOH ≥ 4.95 V, VOL ≤ 0.05 V) meet TTL interface requirements without external biasing or level-shifting circuitry.
How are the two disable controls on MC14503BCPG used in practice?
Disable A (pins 1 & 2) places outputs OUT1–OUT4 into high-impedance state, while Disable B (pin 15) controls only OUT5 and OUT6. This allows selective bus segmentation - for example, isolating four peripheral address lines while keeping two data strobes active, enabling flexible arbitration in multi-master systems without full bus shutdown.
Is MC14503BCPG pin-compatible with older versions like MC14503BCP?
Yes, MC14503BCPG is a direct Pb-free replacement for MC14503BCP in the same PDIP-16 package (Case 648). Both share identical pinout, electrical specifications, and thermal characteristics. The "G" suffix denotes RoHS-compliant lead finish; no PCB or schematic changes are required for migration.
What is the quiescent current consumption of MC14503BCPG at 12 V supply?
At VDD = 12 V and TA = 25°C, the MC14503BCPG draws ≤ 4.0 µA typical and ≤ 60 µA maximum quiescent supply current (IQ) per package. This ultra-low static power enables use in always-on monitoring circuits and battery-buffered systems where standby current must remain below 100 µA.
MC14503BCPG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 4000B
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 2, 4 (Hex)
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 14.1mA, 25mA
- Voltage - Supply:
- 3V ~ 18V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MC14503BCPG FAQ
1.How can I place an order for MC14503BCPG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC14503BCPG 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 MC14503BCPG reliable?
The price and inventory of MC14503BCPG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC14503BCPG is usually 5 days.
3.What payment methods are accepted for MC14503BCPG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC14503BCPG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC14503BCPG?
MC14503BCPG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC14503BCPG 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 MC14503BCPG?
For technical support, including MC14503BCPG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC14503BCPG requirements.
6.How does Aetrix verify that MC14503BCPG is sourced from the original manufacturer or authorized distributors?
All MC14503BCPG 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 MC14503BCPG meets industry standards.
7.What is the process for return or replacement of MC14503BCPG?
All MC14503BCPG units undergo pre-shipment inspection (PSI). If there is an issue with MC14503BCPG, 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 MC14503BCPG part is unused and in its original packaging.
Return procedure for MC14503BCPG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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