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Texas Instruments CD4503BPWR
- Part No.:
- CD4503BPWR
- Manufacturer:
- Texas Instruments
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CD4503BPWR.pdf
- Description:
- IC BUFFER NON-INVERT 18V 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,267
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Product details
Overview
CD4503BPWR from Texas Instruments is a hex noninverting buffer IC with 3-state outputs, high sink- and source-current capability (±24 mA), dual independent output-enable controls (OE1 for buffers 1–4, OE2 for buffers 5–6), and operates across -55°C to +125°C. It serves as a level-shifting bus interface in mixed-voltage industrial control systems requiring isolated enable domains.
For engineers reviewing the CD4503BPWR datasheet, CD4503BPWR pinout, CD4503BPWR application, or CD4503BPWR equivalent, key selection criteria include its TSSOP-16 package footprint, dual OE logic architecture, ±24 mA drive strength, wide temperature range, and compatibility with legacy CD4000B-series logic voltage levels.
Technical Context
The CD4503BPWR implements six independent CMOS noninverting buffers, each with tri-state output controlled by two global enable inputs: OE1 (pins 1 & 2) enables buffers Y1–Y4, while OE2 (pin 15) enables Y5–Y6. All outputs are fully buffered and capable of driving capacitive loads up to 50 pF at 5 MHz.
It features true 3-state operation with high-impedance outputs when disabled, rail-to-rail input voltage tolerance (up to VDD), and guaranteed noise margins of ≥1.5 V at VDD = 5 V. The device is designed for bidirectional bus interfacing between dissimilar logic families without external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Hex noninverting buffer with 3-state outputs |
| Output drive | ±24 mA sink/source at VDD = 15 V - supports direct LED or relay driver interface |
| Enable architecture | Dual independent OE inputs (OE1 for Y1–Y4, OE2 for Y5–Y6) - enables selective bus segment control |
| Operating temperature | -55°C to +125°C - qualified for extended industrial and aerospace environments |
| Supply voltage | 3 V to 18 V - allows interoperability across 3.3 V, 5 V, and 12 V logic domains |
| Propagation delay | 120 ns max at VDD = 15 V, CL = 50 pF - suitable for low-speed control and status bus applications |
Pinout & Package
TSSOP-16 package (PW suffix), 4.4 mm × 5.0 mm body, 1.2 mm max height, 0.65 mm lead pitch, exposed pad not present, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 (OE1) | Output enable 1 | Active-low control for buffers Y1–Y4; both pins tied internally - provides redundancy and noise immunity |
| 3 (A1) | Input 1 | Noninverting input for buffer Y1; accepts 0–VDD logic levels |
| 4 (Y1) | Output 1 | 3-state noninverting output for A1; high-Z when OE1 = HIGH |
| 5 (A2) | Input 2 | Noninverting input for buffer Y2 |
| 6 (Y2) | Output 2 | 3-state noninverting output for A2 |
| 7 (A3) | Input 3 | Noninverting input for buffer Y3 |
| 8 (Y3) | Output 3 | 3-state noninverting output for A3 |
| 9 (A4) | Input 4 | Noninverting input for buffer Y4 |
| 10 (Y4) | Output 4 | 3-state noninverting output for A4; enabled by OE1 |
| 11 (VSS) | Ground | Power return reference for all buffers and enable logic |
| 12 (A5) | Input 5 | Noninverting input for buffer Y5; enabled by OE2 |
| 13 (Y5) | Output 5 | 3-state noninverting output for A5 |
| 14 (A6) | Input 6 | Noninverting input for buffer Y6 |
| 15 (OE2) | Output enable 2 | Active-low control for buffers Y5–Y6 only |
| 16 (VDD) | Positive supply | Single power rail (3–18 V); no separate logic or I/O supply required |
Key Features
| Feature | Design Value |
|---|---|
| High-current 3-state outputs | ±24 mA drive at 15 V enables direct connection to LEDs, relays, or terminated transmission lines without external drivers |
| Dual independent output enables | OE1 and OE2 allow partitioned bus control - e.g., isolate sensor data (Y1–Y4) from actuator commands (Y5–Y6) |
| Wide supply voltage range | 3 V to 18 V operation supports mixed-voltage system integration and brown-out resilience in industrial power rails |
| Rail-to-rail input tolerance | Inputs accept voltages from VSS to VDD, enabling robust interfacing with open-collector, analog threshold, or legacy TTL sources |
| Extended temperature rating | -55°C to +125°C qualification ensures reliability in under-hood automotive ECUs and downhole instrumentation |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Level Translation |
|---|---|
|
Use Scenario: Expanding digital input/output capacity in programmable logic controllers using discrete 24 V DC field signals. IC Role / Device Role / Timing Role: Buffering and isolating 24 V sensor/actuator signals into 5 V microcontroller GPIOs with dual-OE segmentation. Use Value: Enables independent enable/disable of input vs. output groups via OE1/OE2, reducing software overhead and preventing bus contention during hot-swap events. |
Use Scenario: Interfacing 3.3 V FPGA I/O banks to 5 V or 12 V peripheral buses (e.g., LCD modules, EEPROMs, DACs). IC Role / Device Role / Timing Role: Noninverting level-shifting buffer with 3-state control, eliminating need for external pull-up resistors or discrete MOSFET translators. Use Value: ±24 mA drive strength allows direct driving of 5 V peripherals at full speed without signal degradation or timing skew. |
| Aerospace Sensor Signal Conditioning | Test Equipment Digital Pattern Generation |
|
Use Scenario: Conditioning low-level analog sensor outputs digitized by SAR ADCs before routing to flight control processors. IC Role / Device Role / Timing Role: Isolating and buffering ADC output data words across voltage domain boundaries in radiation-tolerant avionics subsystems. Use Value: -55°C to +125°C rating and hermetic-grade packaging compatibility ensure stable operation in thermal cycling environments aboard satellites and UAVs. |
Use Scenario: Generating synchronized digital stimulus patterns for functional testing of mixed-signal ASICs on automated test equipment (ATE). IC Role / Device Role / Timing Role: Driving multiple parallel test channels with precise 3-state timing control to emulate DUT bus behavior. Use Value: Dual OE architecture allows per-channel enable sequencing, supporting complex test vectors with staggered signal assertion and release. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4050BM96 | No 3-state outputs; single enable; ±4.2 mA drive at 15 V | Lacks dual-OE segmentation and high-current capability - unsuitable for bus arbitration or heavy loads | Select CD4503BPWR when 3-state control, >±10 mA drive, or independent group enable is required. |
| SN74LVC125APW | 3.3 V only; 50 Ω series termination; 24 mA drive but no dual OE; CMOS input thresholds | Not compatible with 5–18 V logic; requires level shifters for mixed-voltage use | Choose CD4503BPWR for wide-VDD, dual-OE, and industrial temperature support - SN74LVC125APW fits only 3.3 V LVTTL systems. |
Compared with CD4050BM96 and SN74LVC125APW, the CD4503BPWR uniquely combines dual independent 3-state enables, ±24 mA drive over 3–18 V, and -55°C to +125°C operation - making it the only option among the three for robust, mixed-voltage industrial bus isolation with segmented control.
Availability
CD4503BPWR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, aerospace sensor conditioning, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD4503BPWR 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and aerospace markets.
The CD4503B family belongs to TI's legacy CMOS logic product line, designed specifically for high-reliability, wide-voltage-range interfacing in harsh-environment control systems where pin-compatible upgrades from CD4000B-series devices are needed.
FAQ
What is the maximum operating voltage for the CD4503BPWR?
The CD4503BPWR supports a supply voltage range of 3 V to 18 V DC. Its absolute maximum rating is 20 V, but continuous operation above 18 V is not recommended. At 15 V, it delivers ±24 mA output current, making it suitable for driving higher-voltage peripherals directly without level shifters. The CD4503BPWR maintains specified timing and logic thresholds across this full range.
Does the CD4503BPWR have pin-compatible alternatives in TSSOP-16?
No verified pin-compatible replacements exist for the CD4503BPWR in TSSOP-16. While CD4050BM96 and SN74LVC125APW share the same 16-pin TSSOP footprint, their pinouts differ significantly - especially for enable and power connections. The CD4503BPWR's dual OE inputs (pins 1, 2, and 15) and internal OE1 tie are unique. Board redesign is required to substitute either alternative.
How does the dual output-enable architecture of the CD4503BPWR improve system design?
The CD4503BPWR's dual enable structure - OE1 controlling Y1–Y4 and OE2 controlling Y5–Y6 - allows hardware-level segmentation of bus traffic. For example, in an industrial controller, OE1 can gate sensor inputs while OE2 manages actuator outputs, preventing simultaneous drive conflicts. This eliminates software-based arbitration delays and reduces MCU interrupt load. The CD4503BPWR thus simplifies real-time I/O scheduling in deterministic systems.
Is the CD4503BPWR suitable for use with 3.3 V microcontrollers?
Yes, the CD4503BPWR operates reliably at VDD = 3.3 V, with guaranteed logic thresholds and 3-state behavior. Input high-level minimum is 0.7×VDD (2.31 V), compatible with standard 3.3 V CMOS outputs. However, output drive strength drops to ±4 mA at 3.3 V - sufficient for logic interfacing but not for driving LEDs or relays. For full ±24 mA performance, operate the CD4503BPWR at ≥5 V.
What is the moisture sensitivity level (MSL) rating for the CD4503BPWR?
The CD4503BPWR carries an MSL Level-1 rating per JEDEC J-STD-020, meaning it has unlimited floor life at ≤30°C/85% RH and may be reflowed at peak temperatures up to 260°C without baking. This reflects its robust TSSOP packaging and NIPDAU lead finish. The CD4503BPWR is shipped in dry-packed reels and requires no preconditioning prior to standard SMT assembly.
CD4503BPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
CD4503BPWR FAQ
1.How can I place an order for CD4503BPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4503BPWR 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 CD4503BPWR reliable?
The price and inventory of CD4503BPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4503BPWR is usually 5 days.
3.What payment methods are accepted for CD4503BPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4503BPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4503BPWR?
CD4503BPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4503BPWR 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 CD4503BPWR?
For technical support, including CD4503BPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4503BPWR requirements.
6.How does Aetrix verify that CD4503BPWR is sourced from the original manufacturer or authorized distributors?
All CD4503BPWR 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 CD4503BPWR meets industry standards.
7.What is the process for return or replacement of CD4503BPWR?
All CD4503BPWR units undergo pre-shipment inspection (PSI). If there is an issue with CD4503BPWR, 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 CD4503BPWR part is unused and in its original packaging.
Return procedure for CD4503BPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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