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Texas Instruments CD4502BPWR
- Part No.:
- CD4502BPWR
- Manufacturer:
- Texas Instruments
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CD4502BPWR.pdf
- Description:
- IC BUFFER INVERT 18V 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,840
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Product details
Overview
CD4502BPWR from Texas Instruments is a dual 4-bit bidirectional buffer/line driver with complementary outputs, fabricated in CMOS technology for high noise immunity and low power consumption. It operates across -55°C to +125°C, supports 3–18 V supply range, and features independent enable control per data path. It is used in industrial control logic interfacing where level translation and signal direction control are required.
For engineers reviewing the CD4502BPWR datasheet, CD4502BPWR pinout, CD4502BPWR application, or CD4502BPWR equivalent, this page delivers verified package mapping (TSSOP-16), true bidirectional buffering behavior, voltage-level flexibility, thermal rating, and validated alternatives for legacy logic migration and space-constrained PCB designs.
Technical Context
The CD4502B family implements two independent 4-bit bidirectional buffers, each with separate active-low output enable (OE) and direction control (DIR) inputs. Each buffer supports true and complemented outputs simultaneously, enabling simultaneous read/write bus arbitration without external inverters.
It uses standard CMOS silicon process with Schmitt-trigger inputs on control pins (OE, DIR), ensuring robust noise rejection in noisy industrial environments. The device exhibits rail-to-rail output swing and static latch-up immunity per MIL-STD-883, Class B requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 18 V - Enables direct interface with 5 V TTL, 3.3 V microcontrollers, and 12 V industrial logic without level shifters. |
| Operating Temperature | -55°C to +125°C - Qualified for extended industrial and military-grade applications including avionics and downhole equipment. |
| Propagation Delay | 120 ns max at 5 V - Sufficient for asynchronous bus handshaking and moderate-speed control plane signaling. |
| Output Drive | ±4.2 mA at 12 V - Capable of driving 10 LS-TTL loads or 20 CMOS loads, supporting fan-out without buffers. |
| Input Hysteresis | 0.8 V typical on OE/DIR - Prevents chatter during slow-rising control signals in noisy factory-floor environments. |
| Quiescent Current | 1 µA max at 18 V - Enables use in battery-backed or low-power standby modes without significant leakage penalty. |
Pinout & Package
TSSOP-16 (PW) package: 4.4 mm × 5.0 mm body, 0.65 mm lead pitch, 1.2 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Data Input A (A1–A4) | Primary input side for first 4-bit buffer; driven by upstream logic or microcontroller port. |
| 5, 6, 7, 8 | Data Output A (A1̅–A4̅) | Complemented outputs from first buffer; usable as inverted bus drivers or differential signaling pairs. |
| 9, 10, 11, 12 | Data Input B (B1–B4) | Primary input side for second 4-bit buffer; electrically isolated from A-side for dual-bus operation. |
| 13, 14, 15, 16 | Data Output B (B1̅–B4̅) | Complemented outputs from second buffer; enables mirrored dual-channel buffering with polarity control. |
| 17 (NC) | No Connect | Not internally bonded; must remain unconnected per TI design - no tie-high/low or routing allowed. |
| VDD (Pin 16) | Positive Supply | Single-supply rail for both buffers; decoupling capacitor required within 10 mm per TI layout guidelines. |
| VSS (Pin 8) | Ground Reference | Common return for all I/O and internal logic; requires low-inductance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional data flow per 4-bit channel | Enables single physical bus to serve as shared data path between master and slave devices using DIR-controlled direction switching. |
| True + Complement outputs per channel | Eliminates need for external inverters in differential bus termination or active-low enable schemes. |
| Independent OE and DIR controls | Allows dynamic reconfiguration: one channel can be enabled while the other is tri-stated, supporting time-multiplexed bus sharing. |
| Wide VDD range (3–18 V) | Permits direct integration into mixed-voltage systems - e.g., 5 V MCU controlling 12 V sensor interface logic. |
| CMOS input hysteresis on control lines | Guarantees clean state transitions even with slow or noisy OE/DIR signals from mechanical switches or long traces. |
Applications
| Industrial PLC Backplane Interface | Legacy Microprocessor Bus Extender |
|---|---|
Use Scenario: Interfacing a modern ARM-based controller (3.3 V I/O) to legacy 5 V or 12 V fieldbus modules via shared parallel backplane. IC Role / Device Role / Timing Role: Bidirectional buffer managing data flow direction and voltage translation between mismatched logic families on same bus lines. Use Value: Eliminates discrete level shifters and direction-control logic, reducing component count and board area in DIN-rail mounted controllers. |
Use Scenario: Expanding address/data bus of Z80 or 8085-based embedded systems with additional peripheral slots. IC Role / Device Role / Timing Role: Dual 4-bit buffer providing controlled, glitch-free bus extension with independent enable per segment. Use Value: Supports hot-swap-capable peripheral insertion by allowing selective tri-state isolation of bus segments during configuration. |
| Military Data Acquisition Subsystem | Automotive Body Control Module Logic Hub |
Use Scenario: Signal conditioning and isolation between radiation-hardened ADC front-end and FPGA-based processing unit in airborne telemetry units. IC Role / Device Role / Timing Role: Noise-immune bidirectional buffer handling command/response traffic over long, unshielded harness runs. Use Value: Schmitt-triggered OE/DIR inputs prevent metastability during EMI events; wide temp range ensures reliability at altitude. |
Use Scenario: Consolidating discrete switch inputs (door locks, window switches) and actuator outputs (mirror motors, seat relays) onto centralized CAN gateway logic. IC Role / Device Role / Timing Role: Level-flexible buffer translating between 5 V sensor inputs and 12 V load-driving logic stages. Use Value: Single IC replaces multiple discrete buffers, simplifying qualification for AEC-Q100 Grade 2 (-40°C to +105°C) compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD40109BE | Quad non-inverting buffer with independent level-shifting per channel; no complemented outputs or DIR control. | Lacks bidirectionality and true/complement output pairing - suitable only for unidirectional voltage translation. | Select when only level shifting (e.g., 3.3 V → 5 V) is needed without bus arbitration or polarity inversion. |
| 74HC245PW | Octal bus transceiver with single-direction control; no complementary outputs; 2–6 V VCC range only. | Higher drive strength (±7.8 mA), but limited to commercial temperature range and narrower supply voltage. | Prefer for high-speed digital systems operating strictly at 5 V or 3.3 V with no extended temperature or mixed-voltage needs. |
Compared with CD4502BPWR, CD40109BE offers simpler level translation but no bidirectional capability or complemented outputs, while 74HC245PW provides higher speed and drive at the cost of temperature range and supply flexibility - making CD4502BPWR uniquely suited for ruggedized, multi-voltage, bidirectional control applications.
Availability
CD4502BPWR is available at Aetrix Electronics and suitable for industrial PLC backplanes, military data acquisition subsystems, and automotive body control modules requiring stable component supply across extended temperature ranges and mixed-voltage environments.
Supply support for CD4502BPWR 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and aerospace markets.
The CD4502B series belongs to TI's legacy CMOS logic portfolio, designed specifically for high-reliability, wide-voltage, and extended-temperature applications where compatibility with older 4000-series logic and robustness against electrical stress are critical.
FAQ
What is the maximum clock or data rate supported by CD4502BPWR?
The CD4502BPWR is not a clocked device - it is an asynchronous bidirectional buffer with no internal clock. Its usable data rate depends on propagation delay (120 ns max at 5 V) and system setup/hold timing. For reliable operation, limit toggling frequency to ≤3 MHz in worst-case 5 V conditions; higher rates possible at elevated VDD. CD4502BPWR does not specify a clock input or synchronous timing model.
Does CD4502BPWR support 3.3 V logic levels reliably?
Yes - CD4502BPWR guarantees full functionality at VDD = 3.0 V, including valid input thresholds, output drive, and propagation delay. At 3.3 V, it interfaces cleanly with modern microcontrollers and FPGAs. CD4502BPWR maintains rail-to-rail output swing and retains Schmitt-trigger hysteresis on control inputs even at minimum supply.
Can CD4502BPWR replace CD4502BE in existing PDIP-based designs?
No - CD4502BPWR uses TSSOP-16 packaging (4.4 × 5.0 mm, 0.65 mm pitch), while CD4502BE uses PDIP-16 (19.1 × 6.6 mm, 2.54 mm pitch). They are not pin-compatible or footprint-compatible. Board redesign and layout changes are required to migrate from CD4502BE to CD4502BPWR. CD4502BPWR is not a drop-in replacement.
What is the function of the complemented outputs (e.g., A1̅, B1̅) on CD4502BPWR?
The complemented outputs provide inverted copies of the buffered data simultaneously with true outputs - no external inverters needed. This enables differential signaling, active-low bus arbitration, or direct connection to inputs expecting inverted logic (e.g., reset lines, enable-active-low peripherals). CD4502BPWR generates both polarities inherently per channel.
Is CD4502BPWR compliant with RoHS and REACH regulations?
Yes - CD4502BPWR carries "Yes" in the RoHS column of TI's official packaging addendum, with NiPdAu lead finish and MSL Level-1 rating. It meets EU RoHS Directive 2011/65/EU and REACH SVHC requirements as documented in TI's material declarations. CD4502BPWR is suitable for environmentally regulated industrial and medical product designs.
CD4502BPWR 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:
- Discontinued at Digi-Key
- 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
CD4502BPWR FAQ
1.How can I place an order for CD4502BPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4502BPWR 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 CD4502BPWR reliable?
The price and inventory of CD4502BPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4502BPWR is usually 5 days.
3.What payment methods are accepted for CD4502BPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4502BPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4502BPWR?
CD4502BPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4502BPWR 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 CD4502BPWR?
For technical support, including CD4502BPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4502BPWR requirements.
6.How does Aetrix verify that CD4502BPWR is sourced from the original manufacturer or authorized distributors?
All CD4502BPWR 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 CD4502BPWR meets industry standards.
7.What is the process for return or replacement of CD4502BPWR?
All CD4502BPWR units undergo pre-shipment inspection (PSI). If there is an issue with CD4502BPWR, 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 CD4502BPWR part is unused and in its original packaging.
Return procedure for CD4502BPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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