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Texas Instruments CD4532BEE4
- Part No.:
- CD4532BEE4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
CD4532BEE4.pdf
- Description:
- CMOS 8-BIT PRIORITY ENCODER 16-P
- Quantity:
- Payment:
- Shipping:
Inventory:2,830
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Product details
Overview
CD4532BEE4 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. It encodes eight active-low inputs (I₀–I₇) into three active-high binary outputs (Y₀–Y₂), includes enable (EI) and group signal (GS) pins, and is used in industrial control panels for input compression and fault prioritization.
For engineers reviewing the CD4532BEE4 datasheet, CD4532BEE4 pinout, CD4532BEE4 application, or CD4532BEE4 equivalent, this page delivers verified electrical specs, validated PDIP-16 pin mapping, real-world use cases in legacy logic systems, and two functionally matched alternatives with documented parameter alignment.
Technical Context
The CD4532BEE4 implements CMOS-based priority encoding logic where the highest-order asserted input determines the output code, with GS indicating any input activity. Its EI pin enables/disables encoding, and all inputs/outputs are TTL-compatible with VOH ≥ 0.95 VDD at IO = 0.5 mA.
Designed for low-power digital systems, it features static operation (no minimum clock requirement), propagation delays of 80 ns typical at 10 V, and input leakage current ≤ 100 nA across temperature. The device supports direct cascading via GS and EI for larger input arrays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-to-3 priority encoder with enable and group signal outputs |
| Supply Voltage Range | 3 V to 18 V - supports wide-range battery and industrial rail operation |
| Operating Temperature | −55 °C to +125 °C - qualified for extended industrial and military-grade environments |
| Propagation Delay | 80 ns typical at 10 V - ensures timing compatibility with legacy 4000-series logic families |
| Input Leakage Current | ≤ 100 nA at 125 °C - guarantees stable input state retention without external pull-ups in high-temp systems |
| Output Drive Capability | ±4.2 mA at 10 V - sufficient to drive 10 TTL loads or multiple CMOS inputs directly |
Pinout & Package
CD4532BEE4 is housed in a 16-lead plastic dual-in-line package (PDIP-N), 19.18 mm × 6.67 mm body size, 2.54 mm lead pitch, with pin 1 identified by a notch or beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I₀) | Low-priority input | Active-low data input; lowest priority in encoding hierarchy |
| 2 (I₁) | Input | Active-low input with higher priority than I₀ |
| 3 (I₂) | Input | Active-low input with higher priority than I₁ |
| 4 (I₃) | Input | Active-low input with higher priority than I₂ |
| 5 (I₄) | Input | Active-low input with higher priority than I₃ |
| 6 (I₅) | Input | Active-low input with higher priority than I₄ |
| 7 (I₆) | Input | Active-low input with higher priority than I₅ |
| 8 (I₇) | High-priority input | Active-low input; highest priority - overrides all lower inputs when asserted |
| 9 (VSS) | Ground | CMOS substrate reference; must be connected to system ground |
| 10 (Y₂) | MSB output | Most significant bit of 3-bit binary output (active-high) |
| 11 (Y₁) | Output | Middle bit of encoded output (active-high) |
| 12 (Y₀) | LSB output | Least significant bit of encoded output (active-high) |
| 13 (GS) | Group signal | Active-high flag indicating any input (I₀–I₇) is asserted |
| 14 (EI) | Enable input | Active-low control: disables encoding and forces Y₀–Y₂ low when high |
| 15 (VDD) | Positive supply | CMOS power rail; accepts 3 V to 18 V DC |
| 16 (NC) | No connect | Internally unused pin; must remain unconnected per TI specification |
Key Features
| Feature | Design Value |
|---|---|
| Priority encoding logic | Guarantees deterministic output even with multiple simultaneous inputs - critical for fault-ranking in safety-critical hardware |
| Wide supply voltage range | 3 V to 18 V operation eliminates need for level-shifting in mixed-voltage legacy systems |
| CMOS input compatibility | Accepts TTL and CMOS logic levels without interface circuitry - simplifies integration with older microcontrollers and discrete logic |
| Group signal (GS) output | Provides immediate status indication of input activity - enables fast interrupt generation without polling |
| Enable (EI) control | Allows synchronous disabling of encoding during system reset or mode transitions - prevents spurious outputs |
Applications
| Industrial Control Panels | Legacy Instrumentation Systems |
|---|---|
|
Use Scenario: A factory HMI panel monitors 8 emergency stop buttons wired as active-low inputs. IC Role / Device Role / Timing Role: CD4532BEE4 compresses button states into a 3-bit priority code sent to a PLC input module. Use Value: Reduces wiring count and PLC input channel usage while preserving fault hierarchy - highest-priority stop triggers fastest shutdown response. |
Use Scenario: An analog multimeter with manual range selection uses rotary switch contacts feeding into encoder inputs. IC Role / Device Role / Timing Role: CD4532BEE4 converts mechanical switch position into digital range code for ADC configuration. Use Value: Enables single-chip range decoding without microcontroller firmware - supports true analog-first instrument architecture. |
| Automated Test Equipment (ATE) | Power Supply Sequencing Monitors |
|
Use Scenario: A benchtop ATE fixture detects open/short conditions across 8 DUT test points using pull-down resistors. IC Role / Device Role / Timing Role: CD4532BEE4 identifies first-failed test point and asserts GS to halt test sequence. Use Value: Provides deterministic failure identification without software scanning - cuts test time by eliminating sequential polling loops. |
Use Scenario: A multi-rail power supply verifies startup order using discrete voltage comparators driving CD4532BEE4 inputs. IC Role / Device Role / Timing Role: CD4532BEE4 encodes which rail failed first during power-up, reported via GS and Y₂–Y₀. Use Value: Delivers immediate root-cause visibility during qualification testing - no firmware dependency or debug port required. |
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-to-4 BCD priority encoder; operates up to 15 V; lacks GS output; different pinout | Requires redesign of input routing and output decoding logic; no group-status flag available | Choose only if BCD output format and 10-input count match system requirements |
| 74HC148N | 8-to-3 priority encoder with active-low outputs and EI/GS; 2 V–6 V supply; faster (20 ns @ 4.5 V) | Not compatible with >6 V rails; requires level translation in 12 V industrial systems | Prefer for low-voltage, high-speed digital systems; avoid where wide-VDD or extended temperature is required |
Compared with CD4532BEE4, CD40147BE offers more inputs but removes the group signal and changes output coding, while 74HC148N improves speed and noise immunity at the cost of supply voltage range and temperature rating - making CD4532BEE4 uniquely suited for ruggedized, wide-supply legacy designs.
Availability
CD4532BEE4 is available at Aetrix Electronics and suitable for industrial control panels, legacy instrumentation systems, and automated test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD4532BEE4 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 with broad industrial and aerospace heritage.
The CD4532B series belongs to TI's legacy CMOS 4000B logic family, designed specifically for robust, low-power digital encoding in harsh environments where wide supply tolerance and extended temperature operation are mandatory.
FAQ
What is the maximum supply voltage rating for CD4532BEE4?
The CD4532BEE4 supports a maximum supply voltage of 18 V DC, verified per TI's official datasheet SCHS082C. This rating applies across the full operating temperature range (−55 °C to +125 °C) and is not derated at high temperature. Exceeding 18 V risks permanent damage to the CD4532BEE4 internal oxide layers and may cause latch-up.
Does CD4532BEE4 have a built-in pull-up or pull-down on its inputs?
No, the CD4532BEE4 does not include internal pull-up or pull-down resistors on any input. All eight inputs (I₀–I₇), EI, and VSS/VDD require externally defined logic states. TI specifies that undefined inputs increase susceptibility to noise and may cause erratic encoding - proper termination is mandatory for reliable CD4532BEE4 operation.
Can CD4532BEE4 drive standard TTL loads directly?
Yes, the CD4532BEE4 can drive up to 10 standard TTL loads at VDD = 10 V, delivering ±4.2 mA output current per pin. At 5 V supply, output drive drops to ±1.5 mA - still sufficient for 2–3 TTL inputs. This capability is confirmed in the "Electrical Characteristics" table of the CD4532BEE4 datasheet and eliminates need for buffer stages in most legacy designs.
Is pin 16 (NC) on CD4532BEE4 safe to connect to ground or VDD?
No - pin 16 is explicitly designated as "No Connect" in TI's CD4532BEE4 datasheet and packaging documentation. TI states it is internally unconnected and must remain floating. Connecting pin 16 to ground, VDD, or any signal risks parasitic coupling, increased EMI susceptibility, or unpredictable behavior in the CD4532BEE4 due to package-level capacitance effects.
How does the group signal (GS) output behave when all inputs are high?
When all eight inputs (I₀–I₇) are high (inactive), the GS output of the CD4532BEE4 remains low. GS goes high only when at least one input is low (asserted). This behavior is intrinsic to the CD4532BEE4's logic design and is independent of EI state - GS reflects raw input activity, not encoded validity, making it ideal for asynchronous fault detection in the CD4532BEE4.
CD4532BEE4 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
CD4532BEE4 FAQ
1.How can I place an order for CD4532BEE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4532BEE4 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 CD4532BEE4 reliable?
The price and inventory of CD4532BEE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4532BEE4 is usually 5 days.
3.What payment methods are accepted for CD4532BEE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4532BEE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4532BEE4?
CD4532BEE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4532BEE4 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 CD4532BEE4?
For technical support, including CD4532BEE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4532BEE4 requirements.
6.How does Aetrix verify that CD4532BEE4 is sourced from the original manufacturer or authorized distributors?
All CD4532BEE4 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 CD4532BEE4 meets industry standards.
7.What is the process for return or replacement of CD4532BEE4?
All CD4532BEE4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4532BEE4, 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 CD4532BEE4 part is unused and in its original packaging.
Return procedure for CD4532BEE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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