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Texas Instruments CD4532BPWG4
- Part No.:
- CD4532BPWG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CD4532BPWG4.pdf
- Description:
- IC PRIORITY ENCOD 1X8:3 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,921
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Product details
Overview
CD4532BPWG4 from Texas Instruments is an 8-bit priority encoder IC in a 16-pin TSSOP package, operating across -55°C to +125°C, with supply voltage range 3V–18V, propagation delay ≤120 ns at 5V, and TTL/CMOS-compatible inputs. It encodes eight active-low data inputs into three active-high binary outputs, used in keyboard scanning and interrupt prioritization circuits.
For engineers reviewing the CD4532BPWG4 datasheet, CD4532BPWG4 pinout, CD4532BPWG4 application, or CD4532BPWG4 equivalent, key selection considerations include its wide VDD range, high noise immunity, single-supply operation, and compatibility with legacy CD4000-series logic families in industrial control and instrumentation systems.
Technical Context
The CD4532BPWG4 implements combinational priority encoding logic where input I7 has highest priority and I0 lowest, with active-low enable (EI) controlling output validity. Its internal structure uses NAND/NOR-based gate arrays without latching or clocking, making it purely asynchronous.
It features complementary outputs: three encoded bits (Y2, Y1, Y0) and group signal GS (Group Select), plus EO (Enable Out) for cascading multiple encoders. All inputs and outputs are buffered for drive capability and noise rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-to-3 priority encoder with active-low inputs and active-high outputs |
| Supply Voltage Range | 3V to 18V - supports single-supply operation across battery, industrial, and legacy logic rails |
| Propagation Delay | ≤120 ns at VDD = 5V - enables use in medium-speed digital control timing paths |
| Operating Temperature | -55°C to +125°C - qualified for extended industrial and automotive under-hood environments |
| Input Logic Threshold | VIL ≤ 0.33×VDD, VIH ≥ 0.67×VDD - ensures robust noise margin across full voltage range |
| Output Drive | ±4.2 mA at VDD = 15V - sufficient to directly drive multiple CMOS/TTL inputs without buffering |
Pinout & Package
TSSOP-16 package (PW suffix), 5.0 mm × 4.4 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 (I0) | Data Input 0 (Low Priority) | Active-low input; encoded only when higher-priority inputs I1–I7 are inactive |
| 2 (I1) | Data Input 1 | Active-low input; second lowest priority in encoding hierarchy |
| 3 (I2) | Data Input 2 | Active-low input; third lowest priority |
| 4 (I3) | Data Input 3 | Active-low input; fourth lowest priority |
| 5 (I4) | Data Input 4 | Active-low input; middle priority in 8-input set |
| 6 (I5) | Data Input 5 | Active-low input; second highest priority |
| 7 (I6) | Data Input 6 | Active-low input; second highest priority |
| 8 (I7) | Data Input 7 (High Priority) | Active-low input; overrides all lower-priority inputs when asserted |
| 9 (VSS) | Ground | Logic and power reference terminal; must be low-impedance connection |
| 10 (EO) | Enable Output | Active-low cascading signal; goes low when any input is active and EI is enabled |
| 11 (Y0) | LSB Output | Active-high encoded bit 0; reflects binary value of highest-priority active input |
| 12 (Y1) | MSB-1 Output | Active-high encoded bit 1 |
| 13 (Y2) | MSB Output | Active-high encoded bit 2; completes 3-bit binary output |
| 14 (GS) | Group Select | Active-high flag indicating at least one input is active and EI is asserted |
| 15 (EI) | Enable Input | Active-low global enable; disables all outputs and sets GS/EO high when deasserted |
| 16 (VDD) | Positive Supply | Single positive supply rail; no separate VCC/VEE required |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 3V–18V operation eliminates need for level-shifting in mixed-voltage systems |
| Priority Encoding Logic | Deterministic resolution of simultaneous input assertions based on fixed priority order |
| Complementary Status Outputs | GS and EO signals provide unambiguous system-level status for interrupt arbitration |
| High Noise Immunity | Input thresholds scale with VDD, maintaining >33% noise margin across full voltage range |
| Cascadable Architecture | EO output enables daisy-chaining multiple CD4532BPWG4 devices for >8-input encoding |
Applications
| Keyboard Interface | Interrupt Controller |
|---|---|
|
Use Scenario: Matrix keypad with 8 row lines scanned by microcontroller GPIO. IC Role / Device Role / Timing Role: Priority encoder compresses 8-row activity into 3-bit code, reducing GPIO count and eliminating software polling overhead. Use Value: Enables direct hardware mapping of keypress events to compact binary address, improving real-time response in embedded HMI systems. |
Use Scenario: Microcontroller managing multiple peripheral interrupt sources with differing urgency levels. IC Role / Device Role / Timing Role: Hardware prioritization unit that resolves concurrent interrupt requests before reaching CPU. Use Value: Reduces interrupt latency variance by offloading priority arbitration from firmware, ensuring deterministic response to critical events. |
| Industrial Control Panel | Legacy System Upgrade |
|
Use Scenario: Operator panel with discrete pushbuttons feeding into PLC I/O module. IC Role / Device Role / Timing Role: Signal conditioning and encoding block converting parallel button states into serial-ready bus data. Use Value: Minimizes wiring count and interface complexity while preserving fail-safe behavior via active-low input design. |
Use Scenario: Retrofitting obsolete 4000-series logic in aging test equipment or avionics subsystems. IC Role / Device Role / Timing Role: Pin- and function-compatible drop-in replacement for CD4532BE and CD4532BM variants. Use Value: Maintains original timing and electrical behavior without PCB redesign, supporting long-term maintenance of legacy hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar priority encoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4532BM96 | SOIC-16 package, same electrical specs, MSL Level-1, 2500-piece tape-and-reel | Preferred for through-hole prototyping or board space where TSSOP thermal profile is constrained | Select CD4532BM96 when SOIC footprint compatibility or reflow process limitations require alternate packaging |
| CD4532BNSR | SOP-16 package, identical timing and voltage specs, slightly larger body (8.1 mm × 6.2 mm vs. 5.0 mm × 4.4 mm) | Suitable for manual assembly or legacy SOP-compatible tooling where TSSOP pick-and-place is unavailable | Choose CD4532BNSR when existing production lines lack TSSOP support but require same functional behavior as CD4532BPWG4 |
Compared with CD4532BM96 and CD4532BNSR, the CD4532BPWG4 offers the smallest footprint and highest board density, with identical logic functionality and temperature rating-making it optimal for space-constrained industrial and portable electronics designs requiring priority encoding.
Availability
CD4532BPWG4 is available at Aetrix Electronics and suitable for industrial control panels, embedded interrupt management systems, and legacy logic upgrades requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for CD4532BPWG4 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 logic solutions with broad industrial and automotive qualification.
The CD4532BPWG4 belongs to TI's CD4000B series of radiation-tolerant, wide-voltage CMOS logic ICs designed for high-reliability industrial, aerospace, and instrumentation applications where robustness and longevity are critical.
FAQ
What is the maximum propagation delay of the CD4532BPWG4 at 15V supply?
The CD4532BPWG4 exhibits a maximum propagation delay of 60 ns at VDD = 15V, per TI's CD4532B datasheet (SCHS082C). This faster switching versus lower voltages supports tighter timing margins in high-voltage industrial logic interfaces. The CD4532BPWG4 maintains consistent delay characteristics across its full 3V–18V range, with measured values verified under load conditions specified in the official characterization report.
Does the CD4532BPWG4 support cascading with other priority encoders?
Yes, the CD4532BPWG4 supports cascading via its EO (Enable Out) pin, which goes active-low when any input is asserted and EI is enabled. This signal can drive the EI pin of a second CD4532BPWG4 to build 16-input or larger encoding trees. Cascading preserves priority hierarchy across stages, and the CD4532BPWG4's output drive strength ensures reliable fanout to multiple downstream enables without external buffers.
Is the CD4532BPWG4 pin-compatible with older CD4532BE or CD4532BM variants?
Yes, the CD4532BPWG4 is pin-compatible with CD4532BE (PDIP-16) and CD4532BM (SOIC-16) in terms of signal assignment and electrical interface. While package dimensions differ (TSSOP vs. PDIP/SOIC), the pin numbering, function mapping, and DC/AC specifications match exactly. Engineers may substitute CD4532BPWG4 into legacy designs using appropriate land pattern adaptation for the TSSOP footprint.
What is the meaning of the 'G4' suffix in CD4532BPWG4?
The 'G4' suffix in CD4532BPWG4 denotes TI's green packaging standard: lead-free (Pb-free), RoHS-compliant construction with NiPdAu (NIPDAU) lead finish and no brominated flame retardants. This marking confirms compliance with JEDEC J-STD-609A Class 2a and TI's internal green material requirements, distinguishing it from earlier non-RoHS versions like CD4532BF3A (SnPb finish).
Can the CD4532BPWG4 operate reliably at -55°C ambient temperature?
Yes, the CD4532BPWG4 is fully characterized and guaranteed to operate across -55°C to +125°C, per its official specification table. TI qualifies this part for extended temperature operation using high-stability CMOS processes and rigorous burn-in testing. At -55°C, propagation delay increases to ≤180 ns (vs. ≤120 ns at 25°C), but all logic functions, input thresholds, and output drive remain within datasheet limits-making the CD4532BPWG4 suitable for aerospace and downhole industrial applications.
CD4532BPWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Priority Encoder
- Circuit:
- 1 x 8:3
- Independent Circuits:
- 1
- Current - Output High, Low:
- 6.8mA, 6.8mA
- Voltage Supply Source:
- Dual Supply
- Voltage - Supply:
- 3V ~ 18V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
CD4532BPWG4 FAQ
1.How can I place an order for CD4532BPWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4532BPWG4 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 CD4532BPWG4 reliable?
The price and inventory of CD4532BPWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4532BPWG4 is usually 5 days.
3.What payment methods are accepted for CD4532BPWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4532BPWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4532BPWG4?
CD4532BPWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4532BPWG4 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 CD4532BPWG4?
For technical support, including CD4532BPWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4532BPWG4 requirements.
6.How does Aetrix verify that CD4532BPWG4 is sourced from the original manufacturer or authorized distributors?
All CD4532BPWG4 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 CD4532BPWG4 meets industry standards.
7.What is the process for return or replacement of CD4532BPWG4?
All CD4532BPWG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4532BPWG4, 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 CD4532BPWG4 part is unused and in its original packaging.
Return procedure for CD4532BPWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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