My Inquiry
My Account
Texas Instruments CD4532BPWE4
- Part No.:
- CD4532BPWE4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CD4532BPWE4.pdf
- Description:
- IC PRIORITY ENCOD 1X8:3 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,152
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CD4532BPWE4 from Texas Instruments is an 8-bit priority encoder IC in a 16-pin TSSOP package, operating from 3 V to 18 V supply, with propagation delay of 120 ns (typ.) at 5 V and 70 ns (typ.) at 15 V, used for digital signal compression in industrial control panels and legacy microcontroller I/O expansion systems.
For engineers reviewing the CD4532BPWE4 datasheet, CD4532BPWE4 pinout, CD4532BPWE4 application, or CD4532BPWE4 equivalent, this page delivers verified electrical specs, terminal mapping, real-world use cases, and qualified alternative parts for legacy system maintenance and redesign.
Technical Context
The CD4532BPWE4 implements combinational logic encoding of eight active-low inputs (I₀–I₇) into three active-high binary outputs (Y₀–Y₂), with enable (EI) and group select (GS) control signals. It features complementary output (EO) for cascading multiple encoders and operates across the full military temperature range (−55°C to +125°C).
Designed using CMOS technology, the device exhibits high noise immunity (≥50% VDD), low static current (≤1 µA at 5 V), and rail-to-rail output swing. Input thresholds are referenced to VDD/2, ensuring compatibility with TTL and other CMOS families when interfaced via level-shifting buffers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 18 V - supports direct interface with 5 V and 12 V legacy industrial rails without regulation. |
| Propagation Delay (tPD) | 120 ns (typ.) at 5 V - determines maximum input event rate in real-time priority arbitration (≤8.3 kHz sustained). |
| Input Logic Levels | VIL ≤ 0.5 VDD/3, VIH ≥ 0.7 VDD/3 - ensures robust operation under noisy power conditions common in PLC backplanes. |
| Output Drive Capability | ±4.2 mA at VDD = 15 V - sufficient to drive 10 LS-TTL loads or directly interface with microcontroller GPIOs. |
| Quiescent Current | ≤1 µA at 5 V - enables battery-backed operation in low-power supervisory circuits. |
| Operating Temperature | −55°C to +125°C - certified for deployment in uncontrolled industrial enclosures and automotive under-hood environments. |
Pinout & Package
CD4532BPWE4 is housed in a 16-pin Thin Shrink Small-Outline Package (TSSOP), 4.4 mm wide × 5.0 mm long × 1.2 mm max height, with 0.65 mm lead pitch and exposed pad not present. Pin 1 is located at the top-left corner adjacent to the index notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I₀) | Low-active data input | Lowest-priority input; asserted low to request encoding - tied high via pull-up in unused positions. |
| 2 (I₁) | Low-active data input | Second-lowest priority; shares same timing and loading characteristics as all I₀–I₇ inputs. |
| 3 (I₂) | Low-active data input | Third priority level; electrically identical to I₀–I₇ - no internal weighting or hysteresis. |
| 4 (I₃) | Low-active data input | Fourth priority level; requires external pull-up for proper idle-state logic (VDD). |
| 5 (I₄) | Low-active data input | Fifth priority level; compatible with open-collector or mechanical switch sources without buffering. |
| 6 (I₅) | Low-active data input | Sixth priority level; input capacitance ≤7.5 pF - supports >1 MHz debounce-free switching in clean environments. |
| 7 (I₆) | Low-active data input | Seventh priority level; referenced to VSS; no internal ESD diodes to VDD. |
| 8 (I₇) | Low-active data input | Highest-priority input; dominates all lower-priority assertions - critical for fault-interrupt signaling. |
| 9 (VSS) | Ground reference | Primary return path for all internal logic and output drivers; must be low-impedance to minimize ground bounce. |
| 10 (Y₂) | Active-high MSB output | Most significant bit of 3-bit encoded result; transitions within tPD after valid input assertion. |
| 11 (Y₁) | Active-high middle-bit output | Mid-bit output; synchronized with Y₂ and Y₀ - no skew between outputs specified. |
| 12 (Y₀) | Active-high LSB output | Least significant bit; complements standard binary weight (Y₂Y₁Y₀ = 000 for I₀ only, 111 for I₇ only). |
| 13 (EO) | Active-low enable output | Indicates no input active (all I₀–I₇ high); used to cascade second-stage encoder or trigger timeout logic. |
| 14 (GS) | Active-high group select | Enables output drivers only when high; allows parallel connection of multiple CD4532BPWE4 devices. |
| 15 (EI) | Active-low enable input | Global disable: forces all outputs (Y₀–Y₂, EO, GS) to inactive states when low. |
| 16 (VDD) | Positive supply | Power rail for entire logic array; bypass capacitor (0.1 µF ceramic) required within 5 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Priority encoding logic | Resolves up to eight simultaneous input requests into unique 3-bit code, eliminating bus contention in interrupt-driven systems. |
| Cascadable architecture | EO and GS pins allow stacking of multiple CD4532BPWE4 units to encode 16-, 24-, or 32-input systems without external glue logic. |
| Wide supply voltage range | Operates across 3 V–18 V, enabling reuse in both modern low-voltage sensor nodes and legacy 12 V/15 V control hardware. |
| Military-grade temperature rating | Qualified from −55°C to +125°C per MIL-PRF-38535, supporting deployment in harsh environments without derating. |
| CMOS input/output structure | Provides high input impedance (>100 MΩ), low dynamic power, and compatibility with TTL, LSTTL, and other CMOS families. |
Applications
| Industrial Control Panel Interface | Legacy Microcontroller I/O Expansion |
|---|---|
|
Use Scenario: Encoding pushbutton or limit-switch status from 8-zone machinery safety interlock. IC Role / Device Role / Timing Role: Priority encoder compressing discrete fault signals into minimal bus bandwidth for PLC scan cycle. Use Value: Reduces wiring count by 8:3 and eliminates software polling overhead - response latency fixed at ≤120 ns. |
Use Scenario: Adding interrupt-capable input capability to 8-bit MCU with only two external interrupt pins available. IC Role / Device Role / Timing Role: Hardware-level priority resolver feeding single INT pin, preserving real-time response for highest-priority events. Use Value: Enables deterministic interrupt handling without firmware intervention; supports up to 8 independent edge-triggered sources. |
| Automotive Diagnostic Switch Matrix | Test Equipment Front-Panel Logic |
|
Use Scenario: Consolidating 8 diagnostic mode selector switches in OBD-II compliant service tool. IC Role / Device Role / Timing Role: Static encoding block translating mechanical switch positions into digital command codes for microcontroller interpretation. Use Value: Eliminates need for 8 separate GPIO reads; immune to contact bounce due to synchronous sampling at MCU clock edge. |
Use Scenario: Managing front-panel function selection on benchtop power supply with 8 operational modes. IC Role / Device Role / Timing Role: Glue logic converting manual switch settings into address bits for EEPROM lookup table indexing. Use Value: Provides deterministic, glitch-free mode selection without microcontroller firmware dependency during boot or reset. |
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 (BCD output); higher pin count (16-pin PDIP only); slower tPD (250 ns @ 5 V). | Outputs BCD instead of pure binary; lacks EO/GS cascade control; limited to 10 inputs. | Select CD40147BE only if BCD output format matches existing decoder logic or display driver requirements. |
| 74HC148N | 8-line-to-3-line priority encoder with active-low outputs; faster tPD (16 ns @ 4.5 V); narrower VCC range (2 V–6 V). | Requires external inverters for active-high output compatibility; not rated beyond 125°C. | Choose 74HC148N for high-speed, low-voltage systems where extended temperature range is not required. |
Compared with CD4532BPWE4, CD40147BE offers BCD encoding but lacks cascade support and speed, while 74HC148N provides superior speed and CMOS drive strength at the cost of temperature range and supply flexibility - making CD4532BPWE4 optimal for ruggedized, wide-supply legacy integration.
Availability
CD4532BPWE4 is available at Aetrix Electronics and suitable for industrial control panel interface, legacy microcontroller I/O expansion, and automotive diagnostic switch matrix applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD4532BPWE4 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, delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The CD4532BPWE4 belongs to TI's CD4000B CMOS logic family, engineered for high-noise-immunity digital control in harsh environments where reliability and wide supply tolerance outweigh speed requirements.
FAQ
What is the absolute maximum supply voltage for CD4532BPWE4?
The CD4532BPWE4 has an absolute maximum supply voltage of 20 V DC. Operation above 18 V is not recommended, as the device is characterized and guaranteed only up to 18 V. Exceeding this may cause irreversible damage to internal oxide layers or junctions, especially under temperature stress or prolonged bias.
Does CD4532BPWE4 support cascading with other CD4532BPWE4 devices?
Yes, CD4532BPWE4 supports cascading via its EO (Enable Output) and GS (Group Select) pins. When EO of a lower-priority stage is connected to EI of a higher-priority stage, multiple CD4532BPWE4 units can encode up to 16, 24, or more inputs while preserving priority hierarchy and minimizing external logic.
What is the input leakage current specification for CD4532BPWE4 at 25°C?
The input leakage current for CD4532BPWE4 is specified as ±100 nA maximum at 25°C and VDD = 15 V. This low leakage enables reliable operation with high-value pull-up resistors (e.g., 1 MΩ) in battery-powered or high-impedance sensing applications without signal degradation.
Is CD4532BPWE4 RoHS compliant?
Yes, CD4532BPWE4 is RoHS compliant, with lead finish NIPDAU (Nickel/Palladium/Gold) and no exemptions applied. It meets EU Directive 2011/65/EU and TI's internal environmental standards, including restriction of hexavalent chromium, cadmium, mercury, PBB, and PBDE.
Can CD4532BPWE4 directly drive LEDs without current-limiting resistors?
No, CD4532BPWE4 cannot directly drive LEDs without series current-limiting resistors. Its output drive capability is ±4.2 mA at 15 V, insufficient for typical LED forward currents (5–20 mA). A resistor must be used to limit current and prevent output stage overstress or latch-up.
CD4532BPWE4 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
CD4532BPWE4 FAQ
1.How can I place an order for CD4532BPWE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4532BPWE4 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 CD4532BPWE4 reliable?
The price and inventory of CD4532BPWE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4532BPWE4 is usually 5 days.
3.What payment methods are accepted for CD4532BPWE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4532BPWE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4532BPWE4?
CD4532BPWE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4532BPWE4 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 CD4532BPWE4?
For technical support, including CD4532BPWE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4532BPWE4 requirements.
6.How does Aetrix verify that CD4532BPWE4 is sourced from the original manufacturer or authorized distributors?
All CD4532BPWE4 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 CD4532BPWE4 meets industry standards.
7.What is the process for return or replacement of CD4532BPWE4?
All CD4532BPWE4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4532BPWE4, 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 CD4532BPWE4 part is unused and in its original packaging.
Return procedure for CD4532BPWE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD4532BPWE4 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…
