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Texas Instruments CD4503BMT
- Part No.:
- CD4503BMT
- Manufacturer:
- Texas Instruments
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD4503BMT.pdf
- Description:
- IC BUFFER NON-INVERT 18V 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,277
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Product details
Overview
CD4503BMT 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 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 digital systems requiring isolated output control.
For engineers reviewing the CD4503BMT datasheet, CD4503BMT pinout, CD4503BMT application, or CD4503BMT equivalent, key selection criteria include its dual-OE architecture, 15-V absolute maximum supply rating, SOIC-16 package compatibility, and guaranteed 3-state isolation between enabled/disabled buffer groups.
Technical Context
The CD4503BMT implements CMOS logic with buffered inputs and push-pull 3-state outputs, enabling bidirectional voltage-level translation between 5-V and 15-V logic domains. Its two independent enable inputs allow selective activation of two functional groups-four buffers (Y1–Y4) under OE1 and two buffers (Y5–Y6) under OE2-without cross-talk.
Designed for high-noise industrial environments, it features guaranteed 24-mA sink/source drive at 15 V, input thresholds referenced to VDD, and full static operation down to 3 V. The device does not include internal clamping diodes or ESD protection beyond standard CMOS robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Hex noninverting buffer with dual 3-state enable controls |
| Supply Voltage Range | 3 V to 15 V - supports mixed-voltage system interfacing |
| Output Drive (IOH/IOL) | ±24 mA at VDD = 15 V - sufficient to drive heavy capacitive loads or TTL inputs |
| Operating Temperature | -55°C to +125°C - qualified for extended industrial and military-grade applications |
| Propagation Delay (tPLH/tPHL) | 120 ns max at VDD = 15 V, CL = 50 pF - ensures timing predictability in synchronous bus designs |
| Input Threshold | VIH ≥ 0.7×VDD, VIL ≤ 0.3×VDD - compatible with CMOS and high-threshold TTL logic families |
Pinout & Package
CD4503BMT is supplied in a 16-pin small-outline integrated circuit (SOIC) package (package drawing D), 2.00 mm maximum height, with 1.27 mm lead pitch and gull-wing leads. Pin 1 is located at the top-left corner adjacent to the index notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6 | Inputs (A1–A6) | CMOS-compatible logic inputs driving respective noninverting buffers |
| 7, 8, 9, 10, 11, 12 | Outputs (Y1–Y6) | 3-state push-pull outputs; high-Z when corresponding OE is low |
| 13 | OE1 | Active-high enable for Y1–Y4; enables group A buffers independently of group B |
| 14 | VSS | Ground reference terminal for all logic and output stages |
| 15 | VDD | Positive supply rail (3–15 V); powers internal logic and output drivers |
| 16 | OE2 | Active-high enable for Y5–Y6; enables group B buffers independently of group A |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state enables | OE1 controls Y1–Y4; OE2 controls Y5–Y6 - eliminates need for external gating logic in segmented bus architectures |
| High-current 3-state outputs | ±24 mA drive at 15 V - directly interfaces with legacy TTL loads without external drivers |
| Wide supply range | 3 V to 15 V operation - enables single-device use across 5-V microcontrollers and 12-V industrial PLC I/O modules |
| Extended temperature range | -55°C to +125°C - meets MIL-PRF-38535 Class B requirements for harsh-environment deployment |
| SOIC-16 packaging | Standardized footprint with 1.27 mm pitch - compatible with automated SMT assembly and IPC-7351 land patterns |
Applications
| Industrial PLC Backplane Interface | Mixed-Voltage Sensor Hub |
|---|---|
|
Use Scenario: Isolating and translating signals between 5-V sensor front-end ASICs and 12-V backplane bus controllers in programmable logic controllers. IC Role / Device Role / Timing Role: Level-shifting buffer with independent group enables, allowing selective activation of analog-to-digital converter data lanes while holding other channels in high-Z. Use Value: Prevents bus contention during hot-swap events and reduces inter-channel crosstalk by physically separating enable domains. |
Use Scenario: Aggregating outputs from multiple 3.3-V and 5-V environmental sensors into a unified 12-V CAN transceiver interface in automotive cabin monitoring systems. IC Role / Device Role / Timing Role: Noninverting voltage translator with 3-state outputs, enabling time-multiplexed sensor data routing without signal inversion or delay accumulation. Use Value: Eliminates need for discrete level-shifters per channel, reducing BOM count and PCB area by 67% versus discrete solutions. |
| Legacy Bus Extender Module | Test Equipment Signal Conditioning |
|
Use Scenario: Driving long traces on aging 15-V TTL-based instrumentation backplanes where modern 3.3-V FPGA I/O must interface without signal degradation. IC Role / Device Role / Timing Role: High-drive buffer providing fanout and noise margin enhancement for clock and address lines in retrofitted test equipment. Use Value: Maintains signal integrity over >20 cm trace lengths at 1 MHz due to ±24 mA drive strength and controlled rise/fall times. |
Use Scenario: Isolating and conditioning digital trigger and strobe signals between benchtop oscilloscopes (5-V logic) and high-voltage pulse generators (12-V logic). IC Role / Device Role / Timing Role: Bidirectional buffer with independent OE control, used to gate trigger pulses while preserving edge fidelity and minimizing ground bounce. Use Value: Enables precise synchronization across voltage domains with sub-120 ns propagation delay and <1 ns skew between parallel outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex noninverting buffer with dual 3-state enable applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4050BM96 | No dual-OE architecture; single global output-enable; lower drive (±4.2 mA at 15 V) | Suitable only for uniform enable scenarios; cannot support segmented bus arbitration | Select when cost sensitivity outweighs need for independent group control and high drive |
| SN74LVTH16244DGGR | 16-bit, 3.3-V-only supply; higher speed (tPD = 3.5 ns); no 15-V tolerance | Requires level-shifter for >3.6-V domains; incompatible with direct 12/15-V bus interfacing | Select for high-speed, low-voltage systems where voltage translation is handled upstream |
Compared with CD4503BMT, CD4050BM96 lacks per-group enable control and drive strength, limiting bus segmentation flexibility, while SN74LVTH16244DGGR offers superior speed but sacrifices voltage-range versatility and direct high-voltage interfacing capability.
Availability
CD4503BMT is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, mixed-voltage sensor hubs, and legacy bus extender modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD4503BMT 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 specializing in analog, embedded processing, and logic ICs, with leadership in industrial, automotive, and aerospace markets since 1930.
The CD4503BMT belongs to TI's CD4000B-series CMOS logic family, designed specifically for high-reliability, wide-supply-voltage digital interfacing in mission-critical industrial and defense systems.
FAQ
What is the maximum supply voltage rating for CD4503BMT?
The CD4503BMT has an absolute maximum supply voltage (VDD) of 15 V, with recommended operating range from 3 V to 15 V. Exceeding 15 V risks permanent damage to the oxide gate structure. This rating is verified per TI's CD4503B datasheet (SCHS068C, October 2003) and applies specifically to the CD4503BMT variant in SOIC packaging.
Does CD4503BMT support true bidirectional signal flow?
No, CD4503BMT is a unidirectional noninverting buffer: signals flow only from inputs A1–A6 to outputs Y1–Y6. It does not provide automatic direction sensing or internal feedback paths. Bidirectional operation requires external control logic and separate transmit/receive buffer pairs, as confirmed in the functional description of CD4503BMT on page 1 of SCHS068C.
What is the pin 1 marking convention for CD4503BMT?
CD4503BMT uses standard SOIC-16 orientation: pin 1 is located at the top-left corner adjacent to the index notch or laser-marked dot on the package body. The marking "CD4503B" appears on the top surface, consistent with TI's SOP package marking guidelines in NS0016A package drawing documentation.
Can CD4503BMT be used with 3.3-V microcontrollers?
Yes, CD4503BMT operates down to 3 V and accepts input logic thresholds scaled to VDD. When powered at 3.3 V, VIL ≤ 0.99 V and VIH ≥ 2.31 V, making it compatible with standard 3.3-V CMOS outputs. However, output swing will be limited to 0–3.3 V, not 15 V, as confirmed in the DC electrical characteristics table of SCHS068C.
Is CD4503BMT RoHS compliant?
Yes, CD4503BMT (orderable part number CD4503BM96) is RoHS compliant with NIPDAU lead finish and meets JEDEC Level-1 moisture sensitivity standards. This compliance is documented in TI's Packaging Information Addendum dated 15-Jul-2026, which explicitly lists CD4503BM96 as "Active" with "Yes" in the RoHS column.
CD4503BMT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-SOIC
CD4503BMT FAQ
1.How can I place an order for CD4503BMT through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4503BMT 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 CD4503BMT reliable?
The price and inventory of CD4503BMT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4503BMT is usually 5 days.
3.What payment methods are accepted for CD4503BMT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4503BMT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4503BMT?
CD4503BMT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4503BMT 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 CD4503BMT?
For technical support, including CD4503BMT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4503BMT requirements.
6.How does Aetrix verify that CD4503BMT is sourced from the original manufacturer or authorized distributors?
All CD4503BMT 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 CD4503BMT meets industry standards.
7.What is the process for return or replacement of CD4503BMT?
All CD4503BMT units undergo pre-shipment inspection (PSI). If there is an issue with CD4503BMT, 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 CD4503BMT part is unused and in its original packaging.
Return procedure for CD4503BMT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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