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Texas Instruments CD4502BPW
- Part No.:
- CD4502BPW
- Manufacturer:
- Texas Instruments
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CD4502BPW.pdf
- Description:
- IC BUFFER INVERT 18V 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,803
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Product details
Overview
CD4502BPW from Texas Instruments is a dual 4-bit bidirectional buffer/line driver with non-inverting and inverting outputs, operating across -55°C to +125°C, featuring 16-pin TSSOP package, 15 V max supply voltage, and CMOS logic compatibility. It enables data direction control in legacy industrial control backplanes and military-grade telemetry interfaces.
For engineers reviewing the CD4502BPW datasheet, CD4502BPW pinout, CD4502BPW application, or CD4502BPW equivalent, key selection criteria include its dual-channel bidirectional buffering capability, wide temperature range, RoHS-compliant NIPDAU lead finish, Level-1 MSL rating, and compatibility with 5–15 V logic systems.
Technical Context
The CD4502BPW implements two independent 4-bit bidirectional buffers, each with separate enable (E) and direction (DIR) controls. Each channel supports true and complemented outputs simultaneously, allowing simultaneous read/write bus arbitration without external inverters.
It uses standard CMOS silicon-gate technology with buffered inputs, ensuring high noise immunity and low static current (<1 µA at 25°C). Input thresholds are referenced to VDD/2, enabling reliable operation across its full 3–15 V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | CMOS - ensures low power consumption and high noise margin in mixed-voltage systems |
| Supply Voltage Range | 3 V to 15 V - supports direct interface with legacy 5 V, 10 V, and 12 V control buses |
| Operating Temperature | -55°C to +125°C - qualified for extended-range military and aerospace environments |
| Propagation Delay | 120 ns typical at 10 V - sufficient for sub-MHz synchronous bus handshaking |
| Output Drive | ±4.2 mA at 10 V - drives standard TTL loads and short PCB traces without buffering |
| Input Threshold | VDD/2 - eliminates need for external biasing in single-supply configurations |
Pinout & Package
CD4502BPW is housed in a 16-pin Thin Shrink Small-Outline Package (TSSOP), 4.4 mm × 5.0 mm body, 1.2 mm max height, 0.65 mm pitch, with exposed pad not electrically connected. Pin 1 marked by index area per JEDEC MO-153.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Channel A inputs (A1–A4) | True-side data inputs for first 4-bit buffer; CMOS-compatible thresholds |
| 5, 6, 7, 8 | Channel A outputs (Y1–Y4) | Non-inverting buffered outputs; drive capability ±4.2 mA |
| 9, 10, 11, 12 | Channel B inputs (B1–B4) | True-side inputs for second independent 4-bit buffer |
| 13, 14, 15, 16 | Channel B outputs (Z1–Z4) | Inverting buffered outputs; complementary to B1–B4 for differential signaling |
| 10 (DIR A), 15 (DIR B) | Direction control inputs | High = output enabled as driver; Low = output in high-impedance state |
| 9 (E A), 1 (E B) | Enable inputs | Active-high enables respective channel; both must be asserted for bidirectional flow |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit bidirectional buffers | Enables two isolated data paths on one IC-reduces board space vs. discrete solutions |
| Separate DIR and E controls per channel | Allows asymmetric enable timing and independent direction sequencing in multi-cycle protocols |
| True + complemented outputs per channel | Eliminates need for external inverters in differential bus drivers or parity generation |
| Wide VDD range (3–15 V) | Supports direct integration into legacy 5 V, 10 V, and 12 V systems without level shifters |
| High-impedance outputs when disabled | Prevents bus contention during reset or standby-critical for shared backplane architectures |
Applications
| Industrial Control Backplane | Military Telemetry Interface |
|---|---|
|
Use Scenario: Bidirectional data transfer between microcontroller and analog I/O module over a 16-bit parallel bus in an oilfield PLC rack. IC Role / Device Role / Timing Role: Dual 4-bit buffer managing address/data multiplexing and direction control under real-time RTOS scheduling. Use Value: Enables deterministic bus arbitration with <120 ns propagation delay and guaranteed -55°C startup-no cold-start failure in arctic deployments. |
Use Scenario: Interfacing radiation-hardened FPGA to sensor array in satellite telemetry subsystem requiring fault-tolerant bus isolation. IC Role / Device Role / Timing Role: Signal conditioning and direction-controlled buffering between FPGA I/O banks and analog front-end ADC/DAC modules. Use Value: High-impedance disable state prevents latch-up during power sequencing; 15 V tolerance accommodates unregulated spacecraft bus rails. |
| Legacy Avionics Data Bus | Secure Crypto Module Interface |
|
Use Scenario: Replacing obsolete TTL buffers in MIL-STD-1553B auxiliary control path where voltage translation and bus loading must be minimized. IC Role / Device Role / Timing Role: Level-shifting and bidirectional buffering between 5 V controller and 12 V actuator interface cards. Use Value: Single-supply 12 V operation eliminates dual-rail regulators; CMOS inputs reduce quiescent current by >95% vs. original 74LS parts. |
Use Scenario: Isolating cryptographic processor from tamper-detection sensors and secure memory in FIPS 140-2 Level 3 hardware security module. IC Role / Device Role / Timing Role: Direction-controlled data gating between crypto core and side-channel monitoring peripherals. Use Value: Independent DIR/E per channel allows time-gated sensor reads without exposing internal bus states-mitigates timing-based side-channel leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD40164BE | Single 8-bit shift register with parallel load; no bidirectional capability or DIR control | Used for serial-to-parallel conversion-not suitable for bus arbitration or bidirectional flow | Select only if application requires clocked data latching rather than real-time direction control |
| SN74LVC8T245PW | 8-bit dual-supply translator with 1.65–5.5 V I/O; no high-voltage (15 V) support or -55°C rating | Targeted at modern low-voltage digital interconnects-not qualified for extended temperature or high-voltage legacy systems | Choose only for new 3.3 V designs requiring level translation; not drop-in for CD4502BPW's 5–15 V, -55°C environment |
Compared with CD4502BPW, CD40164BE lacks bidirectional control and bus arbitration features, while SN74LVC8T245PW omits high-voltage tolerance and extended temperature qualification-making CD4502BPW uniquely suited for legacy industrial and defense systems requiring robust 15 V, -55°C operation.
Availability
CD4502BPW is available at Aetrix Electronics and suitable for industrial control backplanes, military telemetry interfaces, and legacy avionics data buses requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD4502BPW 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 company founded in 1930, specializing in analog, embedded processing, and high-reliability logic products for industrial, automotive, and aerospace markets.
CD4502BPW belongs to TI's CD4000B series of radiation-tolerant, high-voltage CMOS logic devices, designed specifically for legacy system upgrades and mission-critical applications demanding wide temperature range and long-term supply stability.
FAQ
What is the maximum supply voltage rating for CD4502BPW?
The CD4502BPW is rated for a maximum supply voltage of 15 V DC, with guaranteed operation across the full 3 V to 15 V range. This allows direct use in legacy 12 V and 15 V systems without external regulation. The absolute maximum rating is 20 V, but sustained operation above 15 V violates the device's published specifications and may compromise reliability or timing behavior in the CD4502BPW.
Does CD4502BPW support true bidirectional data flow on each 4-bit channel?
Yes, the CD4502BPW provides true bidirectional capability per channel via independent DIR (direction) and E (enable) inputs. When DIR is high and E is asserted, the channel drives outputs; when DIR is low, outputs enter high-impedance state-enabling external devices to drive the same lines. This behavior is explicitly defined in the CD4502BPW functional diagram and truth table, confirming full bidirectional bus arbitration support.
Is CD4502BPW pin-compatible with CD4502BE or CD4502BM variants?
No, CD4502BPW is not pin-compatible with CD4502BE (PDIP) or CD4502BM (SOIC) despite identical logic function and pin count. The TSSOP (PW) package has 0.65 mm pitch and different pin 1 indexing versus 2.54 mm pitch for PDIP and 1.27 mm for SOIC. Board layout, stencil design, and reflow profile must be redesigned for CD4502BPW-no PCB reuse is possible without mechanical redesign.
What is the thermal performance of CD4502BPW in continuous operation?
The CD4502BPW has a junction-to-ambient thermal resistance (θJA) of 160°C/W in standard JEDEC high-K test board conditions. At 15 V and full output loading, typical power dissipation is <15 mW per channel, resulting in negligible self-heating-even at +125°C ambient. No heatsinking is required, and the device remains within safe operating limits across its full industrial/military temperature range.
Can CD4502BPW interface directly with TTL logic families?
Yes, CD4502BPW outputs can directly drive standard TTL inputs when operated at ≥4.5 V supply, meeting TTL VIH/VIL thresholds. Its CMOS inputs accept TTL-level signals without pull-ups due to VDD/2 threshold symmetry. However, at VDD < 5 V, interfacing with TTL may require verification of noise margins-TI confirms interoperability at 5 V and above per the CD4502BPW datasheet's logic level tables.
CD4502BPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 6
- Input Type:
- -
- Output Type:
- Push-Pull
- Current - Output High, Low:
- 3.4mA, 20.4mA
- Voltage - Supply:
- 3V ~ 18V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
CD4502BPW FAQ
1.How can I place an order for CD4502BPW through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4502BPW 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 CD4502BPW reliable?
The price and inventory of CD4502BPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4502BPW is usually 5 days.
3.What payment methods are accepted for CD4502BPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4502BPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4502BPW?
CD4502BPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4502BPW 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 CD4502BPW?
For technical support, including CD4502BPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4502BPW requirements.
6.How does Aetrix verify that CD4502BPW is sourced from the original manufacturer or authorized distributors?
All CD4502BPW 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 CD4502BPW meets industry standards.
7.What is the process for return or replacement of CD4502BPW?
All CD4502BPW units undergo pre-shipment inspection (PSI). If there is an issue with CD4502BPW, 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 CD4502BPW part is unused and in its original packaging.
Return procedure for CD4502BPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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