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Texas Instruments CD4532BE
- Part No.:
- CD4532BE
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
CD4532BE.pdf
- Description:
- IC PRIORITY ENCOD 1 X 8:3 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:976
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Product details
Overview
CD4532BE from Texas Instruments is an 8-bit priority encoder IC in a 16-pin PDIP package, operating from -55°C to +125°C with supply voltage range 3 V to 18 V, featuring active-low enable (EI), active-low outputs (A0–A2, GS, EO), and cascading capability for larger encoding systems. It is used in industrial control panels for fault code prioritization and digital input consolidation.
For engineers reviewing the CD4532BE datasheet, CD4532BE pinout, CD4532BE application, or CD4532BE equivalent, this page delivers verified electrical specs, validated pin functions, real-world use cases in legacy logic systems, and confirmed drop-in alternatives for obsolescence mitigation and design continuity.
Technical Context
The CD4532BE implements CMOS-based priority encoding logic where only the highest-order active input (I0–I7) determines output state; all lower-priority inputs are masked. Its EI input enables/disables encoding globally, while EO (Enable Output) and GS (Group Select) support daisy-chaining multiple encoders without external gating.
Designed for compatibility with both TTL and CMOS logic families, the CD4532BE features high noise immunity (typical VNIH = 0.45 × VDD, VNIL = 0.55 × VDD) and rail-to-rail output swing, enabling direct interface with downstream latches or microcontroller GPIOs in mixed-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-line to 3-line priority encoder with enable and group select outputs |
| Supply Voltage | 3 V to 18 V - supports wide-range industrial power rails and battery-backed operation |
| Operating Temperature | -55°C to +125°C - qualified for extended-temperature military and automotive under-hood applications |
| Input Logic Levels | CMOS-compatible thresholds - ensures reliable interfacing with 5 V TTL and 3.3 V/5 V/12 V CMOS sources |
| Output Drive | ±4.2 mA at VDD = 15 V - sufficient to drive standard TTL loads or small capacitive buses directly |
| Propagation Delay | 120 ns max at VDD = 15 V - enables use in sub-MHz digital control timing paths |
| Package Type | 16-pin PDIP (N) - through-hole compatible for prototyping, repair, and legacy board rework |
Pinout & Package
CD4532BE is housed in a 16-lead plastic dual-in-line package (PDIP-N), 19.1 mm × 6.6 mm body size, 2.54 mm lead pitch, with standard DIP footprint and through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I0) | Lowest-priority data input | Active-high input; masked if any higher I1–I7 is asserted |
| 2 (I1) | Second-lowest priority input | Higher priority than I0; overrides I0 when active |
| 3 (I2) | Third-lowest priority input | Part of ascending priority chain up to I7 |
| 4 (I3) | Fourth-lowest priority input | Enables 8-input hierarchical encoding with deterministic resolution |
| 5 (I4) | Fifth-lowest priority input | Required for full 8-bit input coverage in fault-mapping circuits |
| 6 (I5) | Sixth-lowest priority input | Supports multi-sensor alarm prioritization in safety systems |
| 7 (I6) | Seventh-lowest priority input | Used in industrial PLC I/O modules for interrupt source ranking |
| 8 (I7) | Highest-priority data input | When active, forces A2–A0 = 111 regardless of other inputs |
| 9 (VSS) | Ground reference | Logic and power return node; must be low-impedance for noise immunity |
| 10 (EO) | Enable Output | Active-low open-drain signal indicating encoder is enabled and at least one input is active |
| 11 (GS) | Group Select | Active-low output that goes low when any input I0–I7 is high - used for cascading |
| 12 (A0) | LSB output | Encodes priority rank as binary (A2 A1 A0); active-high |
| 13 (A1) | Mid-bit output | Together with A0 and A2, forms 3-bit priority code |
| 14 (A2) | MSB output | Completes 3-bit output word; A2=1 indicates I4–I7 active |
| 15 (EI) | Enable Input | Active-low global enable - disables all outputs and sets GS/EO high when deasserted |
| 16 (VDD) | Positive supply | Accepts 3–18 V; decoupling capacitor required at pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Priority encoding logic | Deterministic resolution of up to eight simultaneous inputs to a unique 3-bit code based on input rank |
| Cascadable architecture | GS and EO outputs allow stacking of multiple CD4532BE units to encode >8 lines without external logic |
| Wide supply range | Single-supply operation from 3 V to 18 V eliminates need for level shifters in mixed-voltage systems |
| High noise immunity | CMOS input thresholds scale with VDD, maintaining robustness across full voltage range |
| Through-hole PDIP packaging | Facilitates manual assembly, field repair, and long-term availability in maintenance-critical systems |
Applications
| Industrial Control Panels | Legacy PLC I/O Modules |
|---|---|
Use Scenario: Fault indicator bank with eight discrete sensors (overtemp, overcurrent, door open, etc.) feeding into a single microcontroller input port. IC Role / Device Role / Timing Role: Priority encoder compressing eight parallel fault signals into three encoded bits plus status flags (GS/EO). Use Value: Reduces GPIO count by 5 pins versus direct connection; preserves interrupt latency determinism via fixed-priority resolution. | Use Scenario: Retrofitting aging programmable logic controllers with modern microcontroller-based backplanes while retaining original sensor wiring. IC Role / Device Role / Timing Role: Interface bridge translating legacy discrete alarm lines into compact digital codes readable by ARM Cortex-M firmware. Use Value: Eliminates need for FPGA or custom ASIC; leverages existing PCB layout and mechanical mounting due to PDIP compatibility. |
| Automotive Diagnostic Interfaces | Military Panel Annunciators |
Use Scenario: Engine bay diagnostic harness aggregating 8+ sensor alerts (oil pressure loss, coolant boil, alternator failure) for centralized display. IC Role / Device Role / Timing Role: Real-time priority encoder ensuring critical faults (e.g., I7 = engine stall) always dominate display sequencing. Use Value: Meets MIL-STD-810G thermal cycling requirements (-55°C to +125°C) without derating or heatsinking. | Use Scenario: Aircraft cockpit warning system consolidating landing gear, flap, fire, and hydraulic warnings onto a shared annunciator bus. IC Role / Device Role / Timing Role: Deterministic fault ranking IC ensuring highest-severity alerts (e.g., fire = I7) override lower-priority cues during simultaneous events. Use Value: Supports QML-38536 qualification path via CD4532B-MIL variant; maintains functional equivalence with CD4532BE in non-military builds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar priority encoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD40147BE | 10-line to 4-line priority encoder; different pinout; no EO output; requires external inverters for active-high outputs | Supports up to 10 inputs but lacks EO flag needed for cascade-ready designs | Select when encoding >8 inputs is required and cascade signaling is handled externally |
| 74HC148N | TTL-compatible 8-line to 3-line encoder; active-low outputs; 2–6 V supply; faster (20 ns typ), but narrower voltage range | Not rated for >85°C ambient; unsuitable for extended-temperature industrial or automotive deployments | Select for commercial-grade, high-speed applications where temperature range ≤85°C is guaranteed |
Compared with CD4532BE, CD40147BE extends input count but sacrifices cascade simplicity and output polarity consistency, while 74HC148N offers speed and logic-family alignment at the cost of thermal ruggedness and supply flexibility - making CD4532BE the sole choice for wide-temperature, self-contained priority encoding in legacy-reliant systems.
Availability
CD4532BE is available at Aetrix Electronics and suitable for industrial control panels, legacy PLC upgrades, and automotive diagnostic interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD4532BE 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 with broad industrial, automotive, and aerospace qualifications.
The CD4532BE belongs to TI's CD4000B-series CMOS logic family, engineered for high-noise-immunity digital control in harsh environments where reliability, wide supply range, and extended temperature operation are mandatory.
FAQ
What is the supply voltage range supported by the CD4532BE?
The CD4532BE operates from 3 V to 18 V DC. This wide range allows direct integration into systems powered by unregulated 12 V batteries, 5 V logic rails, or 15 V industrial supplies without external regulators. The CD4532BE maintains specified timing and logic thresholds across the full span, making it suitable for mixed-voltage legacy designs where supply rails vary between subsystems.
Does the CD4532BE support cascading with other encoders?
Yes, the CD4532BE supports hardware cascading using its GS (Group Select) and EO (Enable Output) pins. When multiple CD4532BE units are connected, GS from a lower-priority stage drives EI of the next higher-priority stage, enabling seamless expansion to 16-, 24-, or more-input encoding trees without additional logic gates or firmware intervention.
What is the meaning of the "E" suffix in CD4532BE?
The "E" suffix in CD4532BE denotes a 16-pin plastic dual-in-line package (PDIP-N) per TI's packaging nomenclature. It distinguishes this through-hole variant from surface-mount versions like CD4532BM (SOIC), CD4532BNSR (SOP), and CD4532BPWR (TSSOP), ensuring mechanical and assembly compatibility with legacy hand-soldered or wave-soldered PCBs.
Is the CD4532BE pin-compatible with the 74LS148 or 74HC148?
No, the CD4532BE is not pin-compatible with the 74LS148 or 74HC148. While functionally similar as 8-line priority encoders, their pin assignments differ significantly - especially for enable, group select, and output lines. Interchanging them requires PCB redesign. The CD4532BE uses a unique 16-pin layout optimized for CMOS-level compatibility and cascading, unlike the 16-pin but differently mapped 74-series TTL/HC devices.
What is the maximum propagation delay of the CD4532BE at 15 V supply?
The maximum propagation delay of the CD4532BE is 120 ns at VDD = 15 V and TA = 25°C, measured from input transition to valid A0–A2 output change. This value increases slightly at temperature extremes and lower supply voltages, remaining within 200 ns at -55°C and 3 V - sufficient for deterministic response in sub-MHz control loops and panel annunciator timing.
CD4532BE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
CD4532BE FAQ
1.How can I place an order for CD4532BE through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4532BE 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 CD4532BE reliable?
The price and inventory of CD4532BE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4532BE is usually 5 days.
3.What payment methods are accepted for CD4532BE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4532BE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4532BE?
CD4532BE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4532BE 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 CD4532BE?
For technical support, including CD4532BE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4532BE requirements.
6.How does Aetrix verify that CD4532BE is sourced from the original manufacturer or authorized distributors?
All CD4532BE 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 CD4532BE meets industry standards.
7.What is the process for return or replacement of CD4532BE?
All CD4532BE units undergo pre-shipment inspection (PSI). If there is an issue with CD4532BE, 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 CD4532BE part is unused and in its original packaging.
Return procedure for CD4532BE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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