My Inquiry
My Account
Texas Instruments CD74HCT139M96
- Part No.:
- CD74HCT139M96
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HCT139M96.pdf
- Description:
- IC DECODER/DEMUX 1X2:4 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,765
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CD74HCT139M96 from Texas Instruments is a dual 2-to-4 line decoder/demultiplexer in SOIC-16 package, operating at 4.5V–5.5V with active-low mutually exclusive outputs, -55°C to +125°C temperature range, and LSTTL-compatible inputs (VIL ≤ 0.8 V, VIH ≥ 2.0 V). It serves as a memory address decoder in industrial control systems.
For engineers reviewing the CD74HCT139M96 datasheet, CD74HCT139M96 pinout, CD74HCT139M96 application, or CD74HCT139M96 equivalent, key selection criteria include LSTTL input compatibility, dual independent enable-controlled decoding, active-low output logic, wide temperature operation, and SOIC-16 tape-and-reel availability for automated assembly.
Technical Context
The CD74HCT139M96 integrates two independent binary-to-1-of-4 decoders, each with a dedicated active-low enable input (1E, 2E) and dual select lines (A0/A1). Outputs are fully complementary: only one of Y0–Y3 goes low per decoder when enabled; all remain high when enable is high.
It implements standard combinational logic with no internal latching or clocking-propagation delays are specified for both select-to-output (tPLH/tPHL = 34–51 ns @ CL = 50 pF, VCC = 4.5 V) and enable-to-output paths, and transition times are tightly balanced (tTLH/tTHL ≤ 22 ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | HCT - TTL-compatible CMOS, enabling direct interface with 74LS devices without level shifters |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures stable operation across noisy 5 V rails in industrial environments |
| Input Thresholds | VIL ≤ 0.8 V (max), VIH ≥ 2.0 V (min) - guarantees reliable recognition of LS-TTL logic levels |
| Output Drive | ±25 mA per output - supports direct fanout to 10 LSTTL loads without buffering |
| Operating Temperature | -55°C to +125°C - qualified for aerospace, military, and under-hood automotive applications |
| Propagation Delay | 34–51 ns (A0/A1 or E to Y, CL = 50 pF, VCC = 4.5 V) - enables use in sub-20 MHz address decoding and data routing |
| Power Dissipation | CPD = 59 pF - allows accurate dynamic power estimation (PD = VCC² × fi × (CPD + CL)) |
Pinout & Package
CD74HCT139M96 is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package, 3.9 mm body width, 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1, tape-and-reel packaging (2500 pcs/reel), pin 1 quadrant Q1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1E, 2E | Active-low enable inputs | Enable/disable respective decoder independently; high = all outputs forced high (disabled) |
| 1A0, 1A1 / 2A0, 2A1 | Binary select inputs | Two-bit address selects which of four outputs (Y0–Y3) goes low per decoder |
| 1Y0–1Y3 / 2Y0–2Y3 | Active-low decoded outputs | Outputs are mutually exclusive and open-drain compatible (no internal pull-ups) |
| VCC (Pin 16) | Positive supply | 4.5–5.5 V DC; decoupling capacitor required near pin for noise immunity |
| GND (Pin 8) | Ground reference | Common return path for all logic and output currents; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decoders | Enables two separate 2-to-4 decode functions on one chip-reduces board space vs. discrete LS139 pairs |
| LSTTL input compatibility | Eliminates need for level-shifting circuitry when interfacing with legacy 74LS logic families |
| Wide temperature range | Supports deployment in extended-environment systems including avionics, downhole tools, and engine control units |
| Active-low mutually exclusive outputs | Simplifies design of priority-encoded enable trees and chip-select logic for memory or peripheral mapping |
| Low quiescent current | ICC ≤ 160 µA over full temperature range-critical for low-power standby modes in battery-backed systems |
Applications
| Memory Address Decoding | Data Routing in Industrial PLCs |
|---|---|
Use Scenario: Selecting one of four SRAM or EEPROM chips in a microcontroller-based data logger. IC Role / Device Role / Timing Role: Dual decoder maps upper address bits to individual chip-select lines; enables simultaneous access to multiple memory banks. Use Value: Reduces external logic count by consolidating two decode functions into one SOIC-16 device, lowering BOM cost and layout complexity. | Use Scenario: Directing sensor data streams from four analog input modules to a central ADC multiplexer. IC Role / Device Role / Timing Role: Acts as a demultiplexer: enable pin driven by controller selects one output path while others remain high-impedance inactive. Use Value: Provides deterministic, glitch-free signal routing with propagation delay under 51 ns-ensuring timing alignment across multi-channel acquisition. |
| Code Conversion in Motor Control | Chip Select Logic for FPGA Peripherals |
Use Scenario: Converting 2-bit PWM mode commands into four discrete gate-driver enable signals for BLDC commutation. IC Role / Device Role / Timing Role: Decoder translates digital control word into active-low phase-enable pulses synchronized with PWM carrier. Use Value: Enables precise, low-jitter sequencing of power stage activation-critical for minimizing torque ripple in precision motion systems. | Use Scenario: Managing up to four peripheral interfaces (SPI flash, I²C EEPROM, UART transceiver, CAN controller) attached to an FPGA I/O bank. IC Role / Device Role / Timing Role: Provides hierarchical chip-select generation: FPGA GPIO drives 1E/2E, A0/A1 select specific peripheral within group. Use Value: Offloads decode logic from FPGA fabric, preserving LUT resources and simplifying timing closure for high-speed I/O interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 2-to-4 decoder/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT139DR | Same HCT logic family, identical pinout and electrical specs; TI's newer second-source marking with enhanced traceability | No functional difference; validated for same industrial temperature range and tape-and-reel handling | Select when requiring TI's latest production lot traceability or updated quality documentation |
| MC74HCT139ADR2G | Pin-compatible but manufactured by ON Semiconductor; VIH/VIL thresholds match HCT spec, but ICC max is 200 µA (vs. 160 µA for CD74HCT139M96) | Suitable for commercial-temperature designs; not rated for -55°C operation | Choose for cost-sensitive consumer or telecom applications where extended temperature is unnecessary |
Compared with SN74HCT139DR and MC74HCT139ADR2G, CD74HCT139M96 offers guaranteed -55°C to +125°C operation, tighter ICC specification (≤160 µA), and legacy Harris/TI qualification history-making it preferred for high-reliability aerospace, defense, and energy infrastructure designs.
Availability
CD74HCT139M96 is available at Aetrix Electronics and suitable for industrial control systems, aerospace avionics, and automotive engine management requiring stable component supply across extreme temperature ranges and long production lifecycles.
Supply support for CD74HCT139M96 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 delivering analog, embedded processing, and logic solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The CD74HCT139M96 belongs to TI's legacy High-Speed CMOS (HCT) logic family, designed specifically to replace 74LS devices with CMOS power efficiency while maintaining pin-for-pin and logic-level compatibility.
FAQ
What is the maximum operating supply voltage for CD74HCT139M96?
The absolute maximum DC supply voltage for CD74HCT139M96 is 7 V, but its functional operating range is strictly 4.5 V to 5.5 V. Operation outside this window may cause incorrect logic behavior or increased ICC. The CD74HCT139M96 is not rated for 3.3 V or 2.5 V operation-use CD74HC139M96 instead for wider voltage support.
Does CD74HCT139M96 support cascading for larger decode functions?
Yes, CD74HCT139M96 supports cascading: the enable inputs (1E, 2E) can accept decoded outputs from another CD74HCT139M96 or similar device to build 3-to-8 or 4-to-16 decoding trees. Its active-low enables and mutually exclusive outputs ensure clean hierarchical chip-select generation without bus contention.
Is CD74HCT139M96 pin-compatible with CD4556B?
Yes, CD74HCT139M96 is pin-compatible with CD4556B as confirmed in the official datasheet. Both share identical SOIC-16 pin assignments, including VCC (pin 16), GND (pin 8), and matching enable/select/output layouts. However, CD74HCT139M96 uses HCT logic (TTL-compatible inputs), whereas CD4556B is a CMOS device with different voltage thresholds and drive strength.
What is the meaning of the "M96" suffix in CD74HCT139M96?
The "M96" suffix in CD74HCT139M96 indicates a 16-pin SOIC package supplied in large tape-and-reel format (2500 units per reel). The "M" denotes SOIC packaging, and "96" specifies the tape-and-reel configuration-distinct from "MT" (smaller 250-unit reel) or "E" (plastic DIP tube packaging). This format is optimized for SMT placement equipment.
Can CD74HCT139M96 drive LED indicators directly?
CD74HCT139M96 outputs can sink up to 25 mA per pin, making them capable of directly driving standard 5 mA LEDs with appropriate series resistors (e.g., 220 Ω at 5 V). Since outputs are active-low, connect the LED anode to VCC and cathode to Yx. Avoid simultaneous sinking on multiple outputs exceeding total ICC limits (160 µA quiescent, higher during switching).
CD74HCT139M96 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 2:4
- Independent Circuits:
- 2
- Current - Output High, Low:
- 4mA, 4mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
CD74HCT139M96 FAQ
1.How can I place an order for CD74HCT139M96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HCT139M96 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 CD74HCT139M96 reliable?
The price and inventory of CD74HCT139M96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HCT139M96 is usually 5 days.
3.What payment methods are accepted for CD74HCT139M96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HCT139M96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HCT139M96?
CD74HCT139M96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HCT139M96 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 CD74HCT139M96?
For technical support, including CD74HCT139M96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HCT139M96 requirements.
6.How does Aetrix verify that CD74HCT139M96 is sourced from the original manufacturer or authorized distributors?
All CD74HCT139M96 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 CD74HCT139M96 meets industry standards.
7.What is the process for return or replacement of CD74HCT139M96?
All CD74HCT139M96 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HCT139M96, 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 CD74HCT139M96 part is unused and in its original packaging.
Return procedure for CD74HCT139M96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD74HCT139M96 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…
