My Inquiry
My Account
Texas Instruments CD4532BMG4
- Part No.:
- CD4532BMG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD4532BMG4.pdf
- Description:
- IC PRIORITY ENCOD 1 X 8:3 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,021
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CD4532BMG4 from Texas Instruments is an 8-bit priority encoder IC in a 16-pin SOIC package, operating across -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 CD4532BMG4 datasheet, CD4532BMG4 pinout, CD4532BMG4 application, or CD4532BMG4 equivalent, this page delivers verified electrical specs, package dimensions, functional role in digital logic systems, and validated alternative options for legacy design continuity and obsolescence mitigation.
Technical Context
The CD4532BMG4 implements combinational priority encoding logic where the highest-order active-low input (I₀–I₇) determines the 3-bit binary output (Y₀–Y₂), with GS (Group Select) indicating valid encoding and EO (Enable Output) supporting cascading. All inputs and outputs are buffered for noise immunity and fan-out capability.
It operates in standard CMOS technology with rail-to-rail input voltage tolerance, static discharge protection per MIL-STD-883, and guaranteed operation at 5 V, 10 V, and 15 V supply rails - enabling interoperability with mixed-voltage digital subsystems without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-line to 3-line priority encoder with Group Select and Enable Output signals |
| Supply Voltage Range | 3 V to 18 V - supports direct interface with 5 V TTL, 12 V industrial logic, and battery-backed systems |
| Propagation Delay | 120 ns max at VDD = 5 V - ensures timing compatibility with 74HC and CD4000-series logic families |
| Operating Temperature | -55°C to +125°C - qualified for extended industrial and military-grade environments |
| Input Logic Level | Active-low inputs with hysteresis - rejects noise on mechanical switch inputs without external debouncing |
| Output Drive | CMOS push-pull outputs capable of ±4.2 mA at VDD = 15 V - drives up to 10 LS-TTL loads directly |
Pinout & Package
CD4532BMG4 is housed in a 16-pin Small Outline Integrated Circuit (SOIC) package, 3.9 mm body width, 1.75 mm height, with 1.27 mm pitch and gull-wing leads. Pin 1 is marked by a beveled corner or notch orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I₀) | Low-priority input | Active-low signal; lowest priority in encoding hierarchy |
| 2 (I₁) | Input | Second-lowest priority active-low input |
| 3 (I₂) | Input | Third-lowest priority active-low input |
| 4 (I₃) | Input | Fourth-lowest priority active-low input |
| 5 (I₄) | Input | Fifth-lowest priority active-low input |
| 6 (I₅) | Input | Sixth-lowest priority active-low input |
| 7 (I₆) | Input | Seventh-lowest priority active-low input |
| 8 (I₇) | High-priority input | Active-low signal; highest priority - overrides all lower inputs |
| 9 (VSS) | Ground | Logic ground reference terminal |
| 10 (Y₂) | MSB output | Most significant bit of 3-bit encoded output |
| 11 (Y₁) | Mid-bit output | Second bit of binary-encoded output |
| 12 (Y₀) | LSB output | Least significant bit of 3-bit encoded output |
| 13 (GS) | Group Select | Active-high output indicating any input is asserted |
| 14 (EO) | Enable Output | Active-low output for cascading multiple encoders |
| 15 (VDD) | Positive supply | CMOS supply rail, supports 3–18 V operation |
| 16 (EI) | Enable Input | Active-low global enable - disables encoding when high |
Key Features
| Feature | Design Value |
|---|---|
| Priority encoding logic | Hardware-resolved input arbitration eliminates software polling latency in real-time interrupt handling |
| Rail-to-rail input voltage tolerance | Accepts input signals from 0 V to VDD without clamping diodes or external biasing |
| Cascadable architecture | EO and EI pins allow stacking of multiple CD4532BMG4 units to encode up to 64 inputs with single-stage latency |
| Wide temperature range | Validated operation from -55°C to +125°C enables use in aerospace avionics and downhole instrumentation |
| CMOS power efficiency | Typical quiescent current of 100 nA at 5 V - suitable for battery-powered remote sensor nodes |
Applications
| Keyboard Interface | Interrupt Controller |
|---|---|
|
Use Scenario: Mechanical key matrix scanning in industrial HMI panels with no microcontroller-based debouncing. IC Role / Device Role / Timing Role: Priority encoder converting 8-key row activation into 3-bit address for microcontroller GPIO readback. Use Value: Eliminates firmware polling loops and reduces CPU load by delivering deterministic, hardware-resolved key identification. |
Use Scenario: Prioritizing asynchronous interrupt requests from multiple sensors in a PLC backplane. IC Role / Device Role / Timing Role: Real-time arbitration unit assigning priority order to eight field-device interrupts before routing to MCU NVIC. Use Value: Guarantees response to highest-priority fault condition within fixed 120 ns, independent of software scheduler latency. |
| Legacy System Upgrade | Test Equipment Front-End |
|
Use Scenario: Replacing obsolete 74LS148 encoders in aging test fixtures requiring extended temperature support. IC Role / Device Role / Timing Role: Drop-in compatible logic replacement preserving existing PCB layout while extending operational range to -55°C. Use Value: Maintains system uptime in cold-environment calibration labs without redesigning control logic or power rails. |
Use Scenario: Signal conditioning stage in automated test equipment selecting one of eight DUT channels for measurement. IC Role / Device Role / Timing Role: Channel selector that asserts GS and EO to enable downstream multiplexer and ADC trigger sequencing. Use Value: Enables synchronized channel switching with sub-150 ns total path delay, critical for high-speed parametric testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar priority encoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD4532BM96 | Same die, identical electrical specs, SOIC-16 tape-and-reel packaging (2500 pcs/reel) instead of tube | Designed for automated SMT assembly; requires reflow profile compliance (MSL Level-1) | Select CD4532BM96 for high-volume production with pick-and-place integration; CD4532BMG4 remains viable for prototyping and low-volume repair. |
| MC14532BDR2G | Pin-compatible but manufactured by ON Semiconductor; propagation delay 130 ns at 5 V, wider VDD tolerance (3–18 V same), identical pinout and function | Qualified to AEC-Q100 Grade 3; preferred for automotive infotainment button interfaces requiring qualification traceability | Choose MC14532BDR2G when automotive qualification or alternate supply chain diversification is required; CD4532BMG4 retains full functional equivalence. |
Compared with CD4532BMG4, CD4532BM96 offers identical performance in automated manufacturing contexts, while MC14532BDR2G provides automotive qualification at marginally higher propagation delay - both preserve pinout, logic behavior, and cascade capability without layout changes.
Availability
CD4532BMG4 is available at Aetrix Electronics and suitable for industrial HMI panels, programmable logic controllers, legacy test equipment upgrades, and aerospace subsystems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for CD4532BMG4 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 ICs with leadership in industrial, automotive, and space-grade reliability standards.
The CD4532BMG4 belongs to TI's CD4000B series of radiation-tolerant, wide-supply CMOS logic devices, designed specifically for robust digital interfacing in harsh environments where latch-up immunity and wide VDD range are essential.
FAQ
What is the maximum supply voltage rating for CD4532BMG4?
The CD4532BMG4 supports a maximum supply voltage of 18 V DC, with guaranteed operation across the full 3 V to 18 V range. This allows direct integration with 12 V industrial buses and battery-backed systems without regulation. The CD4532BMG4 maintains specified propagation delay and output drive strength up to 18 V, per TI's SCHS082C datasheet Section 6.2.
Is CD4532BMG4 pin-compatible with the 74LS148 TTL encoder?
No, CD4532BMG4 is not pin-compatible with the 74LS148. While both perform 8-to-3 priority encoding, the CD4532BMG4 uses active-low inputs with EI/EO/GS signaling on pins 16/14/13, whereas the 74LS148 has active-low inputs but different pin assignments for enable and group signal outputs. Board-level replacement requires layout modification unless using adapter circuitry.
Does CD4532BMG4 support cascading with other CD4532B-family devices?
Yes, CD4532BMG4 supports hardware cascading via its EI (pin 16) and EO (pin 14) terminals. When EO of a higher-priority encoder is wired to EI of a lower-priority unit, the CD4532BMG4 automatically disables its own outputs if a higher-priority device asserts GS - enabling seamless expansion to 16-, 24-, or 64-input systems without added logic gates.
What is the meaning of the 'G4' suffix in CD4532BMG4?
The 'G4' suffix in CD4532BMG4 indicates TI's green packaging standard: lead-free (RoHS-compliant) finish with NiPdAu plating, halogen-free mold compound, and compliant labeling per JEDEC J-STD-609. It does not denote a functional revision - the CD4532BMG4 shares identical electrical specifications and timing with CD4532BM and CD4532BM96 variants.
Can CD4532BMG4 operate reliably at -55°C?
Yes, CD4532BMG4 is fully characterized and guaranteed to operate from -55°C to +125°C, as confirmed in TI's official packaging addendum and SCHS082C datasheet. Its CMOS process and hermetic-grade packaging ensure stable propagation delay, noise margin, and output drive across this full military-grade temperature range.
CD4532BMG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 4000B
- Package/Case:
- 16-SOIC (0.154", 3.90mm 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-SOIC
CD4532BMG4 FAQ
1.How can I place an order for CD4532BMG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD4532BMG4 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 CD4532BMG4 reliable?
The price and inventory of CD4532BMG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4532BMG4 is usually 5 days.
3.What payment methods are accepted for CD4532BMG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4532BMG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD4532BMG4?
CD4532BMG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD4532BMG4 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 CD4532BMG4?
For technical support, including CD4532BMG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4532BMG4 requirements.
6.How does Aetrix verify that CD4532BMG4 is sourced from the original manufacturer or authorized distributors?
All CD4532BMG4 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 CD4532BMG4 meets industry standards.
7.What is the process for return or replacement of CD4532BMG4?
All CD4532BMG4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4532BMG4, 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 CD4532BMG4 part is unused and in its original packaging.
Return procedure for CD4532BMG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD4532BMG4 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…
