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Texas Instruments CD4503BPW
- Part No.:
- CD4503BPW
- Manufacturer:
- Texas Instruments
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CD4503BPW.pdf
- Description:
- IC BUFFER NON-INVERT 18V 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:746
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Product details
Overview
CD4503BPW from Texas Instruments is a hex noninverting buffer IC with 3-state outputs, high sink- and source-current capability (±24 mA at VDD = 15 V), dual independent output-enable controls (OE1 for buffers A–D, OE2 for E–F), and operates across –55°C to +125°C. It serves as a level-shifting bus interface in legacy industrial control backplanes.
For engineers reviewing the CD4503BPW datasheet, CD4503BPW pinout, CD4503BPW application, or CD4503BPW equivalent, key selection considerations include its TSSOP-16 package footprint, dual OE architecture for partial bus isolation, and compatibility with 5–15 V CMOS logic families in mixed-voltage systems.
Technical Context
The CD4503BPW implements six independent noninverting buffer stages, each with three-state output drivers controlled by two shared enable inputs-OE1 (pins 1 & 2) enables buffers 1–4, OE2 (pin 15) enables buffers 5–6. All outputs are fully buffered CMOS with symmetrical drive strength.
It belongs to the CD4000B series, designed for wide-supply operation (3–18 V), featuring high noise immunity (typ. 50% VDD), low static current (< 1 µA at 25°C), and latch-up immunity per MIL-STD-883. Input thresholds scale with VDD, enabling reliable interfacing across voltage domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Hex noninverting buffer with 3-state outputs and dual OE control |
| Supply Voltage Range | 3 V to 18 V - supports direct interface between 5 V, 10 V, and 15 V logic subsystems |
| Output Drive (IOH/IOL) | ±24 mA at VDD = 15 V - sufficient to drive 50 Ω transmission lines or multiple TTL loads |
| Propagation Delay | 120 ns max at VDD = 15 V, CL = 50 pF - suitable for sub-1 MHz synchronous bus applications |
| Operating Temperature | –55°C to +125°C - qualified for extended-temperature industrial and aerospace environments |
| Input Threshold | VIL ≤ 0.3 VDD, VIH ≥ 0.7 VDD - ensures robust noise margin across full supply range |
Pinout & Package
TSSOP-16 (PW) package: 4.4 mm × 5.0 mm body, 0.65 mm lead pitch, 1.2 mm max height, exposed pad not present, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OE1 (Output Enable 1) | Active-high enable for buffers A–D (pins 3–6 and 11–14); tied together for synchronized control |
| 3–6 | A–D Inputs | Noninverting input terminals for first four buffers |
| 7, 14 | VSS | Ground reference for all logic and output stages |
| 8 | VDD | Positive supply rail (3–18 V); powers all six buffers and internal logic |
| 9–12 | A–D Outputs | 3-state noninverting outputs corresponding to inputs 3–6 |
| 13 | E Input | Noninverting input for fifth buffer |
| 15 | OE2 | Active-high enable for buffers E and F only |
| 16 | F Input | Noninverting input for sixth buffer |
| 11–14 | E–F Outputs | 3-state noninverting outputs corresponding to inputs 13 and 16 |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent output-enable controls | Enables selective activation of two functional groups (4+2) without bus contention during partial system reset |
| High-current 3-state outputs | ±24 mA drive supports direct connection to unterminated PCB traces or legacy TTL loads without external buffers |
| Wide supply voltage range (3–18 V) | Eliminates need for level translators when interfacing 5 V microcontrollers with 12 V analog I/O modules |
| Extended temperature operation (–55°C to +125°C) | Validated for use in unheated outdoor enclosures and engine-control proximity applications |
| CMOS input compatibility | High-impedance inputs draw < 100 nA, minimizing loading on upstream drivers in high-node-count systems |
Applications
| Industrial Backplane Interface | Mixed-Voltage Sensor Hub |
|---|---|
|
Use Scenario: Isolating and buffering address/data lines between a 5 V PLC CPU and 12 V I/O expansion modules on a DIN-rail-mounted backplane. IC Role / Device Role / Timing Role: Hex noninverting buffer providing bidirectional signal integrity and voltage-domain bridging with independent group enable for hot-swap-safe module insertion. Use Value: Dual OE pins allow disabling only affected bus segments during module replacement while maintaining communication on active channels. |
Use Scenario: Aggregating digital outputs from 3.3 V, 5 V, and 12 V sensors into a single 5 V microcontroller ADC interface board. IC Role / Device Role / Timing Role: Level-translating buffer stage ensuring compatible logic thresholds and drive strength across heterogeneous sensor supply domains. Use Value: Wide VDD range eliminates discrete level-shifters; ±24 mA output drives long traces to remote ADC inputs without signal degradation. |
| Legacy Equipment Retrofit | Aerospace Power Sequencing Monitor |
|
Use Scenario: Replacing obsolete 74LS244 in aging test equipment where 15 V logic rails remain in service but PCB space is constrained. IC Role / Device Role / Timing Role: Pin-compatible functional upgrade delivering higher noise immunity, lower power, and smaller TSSOP footprint than DIP packages. Use Value: TSSOP-16 (PW) package reduces board area by >70% vs. PDIP-16 while retaining identical signal routing and thermal performance at 125°C ambient. |
Use Scenario: Monitoring sequencing status of multiple DC/DC converters in a satellite power distribution unit, where discrete enable signals must be gated before reaching downstream regulators. IC Role / Device Role / Timing Role: Fault-tolerant buffer with dual OE inputs allowing redundant control paths and independent channel masking during fault recovery. Use Value: Extended temperature rating and latch-up immunity ensure reliability under radiation-induced transients and thermal cycling in LEO orbit conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex noninverting buffer with 3-state output applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4503BM96 | SOIC-16 package (D), same electrical specs, RoHS-compliant, MSL-1 rated, 2500/reel tape-and-reel | Preferred for new designs requiring surface-mount compatibility with standard SOIC footprints and automated assembly | Select CD4503BM96 if board layout uses SOIC-16 land pattern and volume production requires MSL-1 reflow support. |
| CD4503BNSR | SOP-16 package (NS), identical function and ratings, wider body (5.3 mm vs. 4.4 mm), 2000/reel tape-and-reel | Better suited for manual prototyping or legacy SOP tooling where TSSOP handling is impractical | Choose CD4503BNSR when existing pick-and-place equipment lacks TSSOP-16 nozzle support or board-level repair requires hand-soldering accessibility. |
Compared with CD4503BPW, CD4503BM96 offers superior manufacturability in high-volume SMT lines due to its MSL-1 rating and industry-standard SOIC footprint, while CD4503BNSR provides mechanical robustness and easier rework at the cost of larger board area - both retain identical timing, drive, and temperature behavior.
Availability
CD4503BPW is available at Aetrix Electronics and suitable for industrial backplane interfaces, mixed-voltage sensor hubs, legacy equipment retrofits, and aerospace power sequencing monitors requiring stable component supply despite its Obsolete status.
Supply support for CD4503BPW 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in industrial, automotive, and aerospace electronics.
The CD4503B family was engineered for high-reliability, wide-supply CMOS logic interfacing in harsh-environment systems - emphasizing voltage flexibility, thermal resilience, and deterministic 3-state control for mission-critical bus architectures.
FAQ
What is the maximum operating voltage for the CD4503BPW?
The CD4503BPW supports a supply voltage range of 3 V to 18 V. Its absolute maximum rating is 20 V, but continuous operation above 18 V is not recommended. At VDD = 15 V, it delivers ±24 mA output drive and maintains guaranteed timing performance across –55°C to +125°C - making CD4503BPW suitable for 12 V and 15 V industrial logic systems.
Does the CD4503BPW have pin-compatible alternatives in modern packages?
Yes - CD4503BM96 (SOIC-16) and CD4503BNSR (SOP-16) share identical logic function, timing, drive strength, and temperature specifications with CD4503BPW. Neither is pin-to-pin compatible due to differing lead pitches and body dimensions, but both map the same signal functions to equivalent pin positions within their respective packages.
What is the purpose of the two separate output-enable inputs on the CD4503BPW?
The CD4503BPW features OE1 (pins 1 & 2) controlling buffers A–D and OE2 (pin 15) controlling buffers E–F. This allows independent gating of two functional groups - for example, isolating data lanes while keeping address lanes active, or enabling staged power-up in multi-module systems. CD4503BPW thus avoids bus contention during partial initialization or fault recovery.
Is the CD4503BPW RoHS compliant?
No - the CD4503BPW is marked "Call TI" for RoHS status in TI's packaging addendum and has no RoHS designation. In contrast, its active alternatives CD4503BM96 and CD4503BNSR are explicitly RoHS-compliant with NIPDAU finish. For new designs requiring RoHS compliance, CD4503BPW should be replaced with one of those variants.
Can the CD4503BPW interface directly with TTL logic levels?
Yes - the CD4503BPW's input thresholds (VIL ≤ 0.3 VDD, VIH ≥ 0.7 VDD) and output swing (near rail-to-rail) allow reliable interfacing with TTL when operated at VDD = 5 V. At higher supplies (e.g., 12 V), external pull-down resistors may be needed on TTL inputs to meet VIL limits - a design consideration inherent to CD4503BPW's wide-supply architecture.
CD4503BPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 2, 4 (Hex)
- Input Type:
- -
- Output Type:
- Push-Pull
- Current - Output High, Low:
- 14.1mA, 23mA
- Voltage - Supply:
- 3V ~ 18V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
CD4503BPW FAQ
1.How can I place an order for CD4503BPW through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4503BPW 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 CD4503BPW reliable?
The price and inventory of CD4503BPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4503BPW is usually 5 days.
3.What payment methods are accepted for CD4503BPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4503BPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4503BPW?
CD4503BPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4503BPW 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 CD4503BPW?
For technical support, including CD4503BPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4503BPW requirements.
6.How does Aetrix verify that CD4503BPW is sourced from the original manufacturer or authorized distributors?
All CD4503BPW 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 CD4503BPW meets industry standards.
7.What is the process for return or replacement of CD4503BPW?
All CD4503BPW units undergo pre-shipment inspection (PSI). If there is an issue with CD4503BPW, 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 CD4503BPW part is unused and in its original packaging.
Return procedure for CD4503BPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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