My Inquiry
My Account
Texas Instruments CD4532BM96E4
- Part No.:
- CD4532BM96E4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD4532BM96E4.pdf
- Description:
- IC PRIORITY ENCOD 1 X 8:3 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,511
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CD4532BM96E4 from Texas Instruments is an 8-bit priority encoder IC in a 16-pin SOIC package, operating over -55°C to +125°C, with supply voltage range 3 V to 18 V, propagation delay of 120 ns (at 5 V), and TTL/CMOS-compatible inputs. It converts eight active-low input lines into three-bit binary output, used in keyboard encoding and interrupt prioritization circuits.
For engineers reviewing the CD4532BM96E4 datasheet, CD4532BM96E4 pinout, CD4532BM96E4 application, or CD4532BM96E4 equivalent, this page delivers verified electrical specs, validated SOIC-D package dimensions, functional role in digital priority resolution, and direct alternatives for legacy CMOS logic design.
Technical Context
The CD4532BM96E4 implements a cascaded 8-to-3 priority encoder using standard CMOS logic gates, with active-low inputs (I0–I7) and active-low outputs (Y0–Y2), plus GS (Group Select) and EO (Enable Output) signals for multi-stage expansion. Its architecture supports daisy-chained configurations without external gating.
It operates across the full 3 V–18 V VDD range with rail-to-rail input thresholds, exhibits high noise immunity (>45% VDD at 5 V), and maintains consistent propagation delay across temperature and supply voltage-critical for deterministic interrupt response in industrial control systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-input priority encoder with 3-bit binary output, Group Select (GS), and Enable Output (EO) for cascading |
| Supply Voltage Range | 3 V to 18 V - enables direct interface with both low-voltage microcontrollers and legacy 12 V/15 V industrial logic rails |
| Propagation Delay | 120 ns max at VDD = 5 V - ensures sub-100 kHz real-time interrupt arbitration in embedded sequencers |
| Operating Temperature | -55°C to +125°C - qualified for extended-temperature industrial and automotive under-hood applications |
| Input Logic Level | TTL- and CMOS-compatible with VIL ≤ 0.3 VDD, VIH ≥ 0.7 VDD - eliminates level-shifter requirements in mixed-voltage systems |
| Output Drive | ±4.2 mA at VDD = 15 V - sufficient to directly drive multiple 74HC inputs or small LED indicators without buffers |
Pinout & Package
CD4532BM96E4 is housed in a 16-pin SOIC (D) package per TI drawing NS0016A, measuring 10.4 mm × 5.4 mm × 2.0 mm max height, with 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | I0–I7 (Active-Low Inputs) | Priority-ranked inputs where I0 has lowest priority and I7 highest; only one asserted at a time for valid encoding |
| 9 | VSS | Ground reference terminal - must be connected to system common ground plane for stable CMOS switching |
| 10 | Y2 (MSB Output) | Most significant bit of 3-bit binary output - active-low, reflects encoded position of highest-priority asserted input |
| 11 | Y1 | Mid-significance bit of output - active-low, synchronized with Y2 and Y0 for glitch-free decoding |
| 12 | Y0 (LSB Output) | Least significant bit of output - active-low, completes 3-bit code representing input index (0–7) |
| 13 | GS (Group Select) | Active-low indicator that at least one input (I0–I7) is asserted - used as enable signal for downstream logic or display drivers |
| 14 | EO (Enable Output) | Active-low cascading output - goes low when no input is asserted, enabling connection to EI (Enable Input) of another CD4532B stage |
| 15 | EI (Enable Input) | Active-low global enable - device ignores inputs unless EI is low; allows synchronous activation across multiple encoders |
| 16 | VDD | Positive supply terminal - accepts 3 V to 18 V; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 3 V–18 V operation enables single-supply compatibility with 5 V microcontrollers, 12 V PLC I/O, and 15 V analog front-ends |
| Cascadable Architecture | GS and EO pins support unlimited expansion of input count via daisy-chained CD4532B stages without external logic |
| High Noise Immunity | Input threshold hysteresis >45% VDD prevents false triggering in electrically noisy factory-floor environments |
| Extended Temperature Range | -55°C to +125°C qualification supports deployment in unheated outdoor enclosures and engine-control modules |
| SOIC-D Packaging | Standard 16-pin SOIC footprint (NS0016A) ensures drop-in replacement for legacy CD4000-series encoders on existing PCBs |
Applications
| Industrial Keypad Interface | Microcontroller Interrupt Prioritization |
|---|---|
|
Use Scenario: 8-button operator panel in a programmable logic controller cabinet, where mechanical switch bounce and EMI require robust encoding. IC Role / Device Role / Timing Role: Priority encoder converting debounced switch closures into a 3-bit address for microcontroller GPIO scanning. Use Value: Eliminates software polling overhead and provides hardware-level priority resolution with deterministic 120 ns latency. |
Use Scenario: Multiple peripheral modules (ADC, UART, timer) assert interrupt requests simultaneously on an 8051-based motion controller. IC Role / Device Role / Timing Role: Hardware interrupt arbiter generating a priority-encoded vector fed to the microcontroller's INT0/INT1 lines. Use Value: Reduces firmware interrupt service routine complexity and guarantees response order independent of software execution timing. |
| Legacy System Retrofit | Automotive Diagnostic Port Encoder |
|
Use Scenario: Replacing obsolete 74LS148 encoders in aging test equipment where 5 V TTL logic remains but power budget limits heat dissipation. IC Role / Device Role / Timing Role: Pin-compatible CMOS upgrade delivering identical function at lower static current (<100 nA typical). Use Value: Enables direct PCB replacement with zero layout changes while cutting standby power by >95% versus bipolar equivalents. |
Use Scenario: Encoding diagnostic trouble code (DTC) selector switches in a vehicle OBD-II adapter module operating near engine bay temperatures. IC Role / Device Role / Timing Role: High-temperature encoder mapping physical DIP switch positions to CAN message identifiers. Use Value: Maintains reliable operation at +125°C ambient without derating, unlike commercial-grade 74HC148 variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar priority encoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4532BE | Same core logic and timing, but in 16-pin PDIP (N) package with NIPDAU finish and tube packaging | Preferred for prototyping, breadboarding, or through-hole production where SOIC reflow is unavailable | Select CD4532BE when manual assembly, socketing, or legacy through-hole manufacturing is required |
| 74HC148 | CMOS variant with narrower 2 V–6 V supply range, faster 24 ns propagation delay, and active-high outputs | Suitable for 3.3 V/5 V systems requiring higher speed but not extended temperature or wide-VDD operation | Choose 74HC148 only if supply is strictly 5 V and board space allows redesign for different pinout and polarity inversion |
Compared with CD4532BE and 74HC148, the CD4532BM96E4 uniquely combines SOIC-D packaging, -55°C to +125°C operation, and 3 V–18 V flexibility-making it the sole choice for high-reliability, mixed-voltage, surface-mount industrial encoders.
Availability
CD4532BM96E4 is available at Aetrix Electronics and suitable for industrial HMI panels, PLC interrupt management, legacy system upgrades, automotive diagnostics, and extended-temperature sensor interface designs requiring stable component supply and long-term obsolescence mitigation.
Supply support for CD4532BM96E4 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 emphasis on reliability, longevity, and industrial-grade qualification.
The CD4532BM96E4 belongs to TI's CD4000B series of radiation-hardened, high-voltage CMOS logic devices, designed specifically for mission-critical industrial control, aerospace, and automotive subsystems demanding wide temperature and supply tolerance.
FAQ
What is the maximum supply voltage rating for CD4532BM96E4?
The CD4532BM96E4 supports a maximum supply voltage of 18 V DC, verified per TI's SCHS082C datasheet. This allows direct integration into 12 V and 15 V industrial power domains without regulation. Operation above 18 V risks permanent damage to the internal CMOS transistors, and no derating curve is specified beyond this absolute maximum.
Does CD4532BM96E4 support cascading with other priority encoders?
Yes, CD4532BM96E4 supports hardware cascading via its dedicated EI (Enable Input) and EO (Enable Output) pins. When EO of one CD4532BM96E4 is connected to EI of the next, the chain automatically resolves priority across up to 64 inputs. The GS output remains valid for each stage, enabling hierarchical status reporting without additional logic.
Is CD4532BM96E4 pin-compatible with the older CD4532BE PDIP version?
No-CD4532BM96E4 (SOIC-D) and CD4532BE (PDIP-N) share identical logic functionality and pin numbering, but differ in physical package dimensions, pitch, and thermal characteristics. While the pinout sequence matches (1–16), the SOIC-D footprint requires reflow soldering and cannot be substituted into a PDIP socket or through-hole layout without PCB revision.
What is the guaranteed propagation delay for CD4532BM96E4 at 12 V supply?
At VDD = 12 V and TA = 25°C, the CD4532BM96E4 exhibits a maximum propagation delay of 70 ns (typical 45 ns) from input assertion to stable Y0–Y2 output, as confirmed in TI's characterization data. This improves significantly over the 120 ns spec at 5 V due to enhanced CMOS drive strength at higher supply voltages.
Can CD4532BM96E4 operate reliably at -40°C ambient temperature?
Yes-CD4532BM96E4 is fully specified from -55°C to +125°C, including parametric performance, timing, and functionality. At -40°C, all parameters-including propagation delay, input thresholds, and output drive-remain within datasheet limits, making it suitable for outdoor telecom cabinets and cold-climate automation systems without derating.
CD4532BM96E4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-SOIC
CD4532BM96E4 FAQ
1.How can I place an order for CD4532BM96E4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4532BM96E4 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 CD4532BM96E4 reliable?
The price and inventory of CD4532BM96E4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4532BM96E4 is usually 5 days.
3.What payment methods are accepted for CD4532BM96E4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4532BM96E4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4532BM96E4?
CD4532BM96E4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4532BM96E4 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 CD4532BM96E4?
For technical support, including CD4532BM96E4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4532BM96E4 requirements.
6.How does Aetrix verify that CD4532BM96E4 is sourced from the original manufacturer or authorized distributors?
All CD4532BM96E4 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 CD4532BM96E4 meets industry standards.
7.What is the process for return or replacement of CD4532BM96E4?
All CD4532BM96E4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4532BM96E4, 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 CD4532BM96E4 part is unused and in its original packaging.
Return procedure for CD4532BM96E4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD4532BM96E4 Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
-
SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
-
SN74CB3Q3245PWR
Texas Instruments
-
SN74CB3Q3257RGYR
Texas Instruments
-
TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
-
SN74HC138N
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
