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Home > Products > Integrated Circuits (ICs) > Logic > Signal Switches, Multiplexers, Decoders

Texas Instruments 7704801EA

Name: 7704801EA
Brand: Texas Instruments
SKU: 7704801EA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 7704801EA

Manufacturer:: Texas Instruments

Category:: Signal Switches, Multiplexers, Decoders

Package:: -

Datasheet:: 7704801EA.pdf

Description:: CD4556B-MIL CMOS DUAL BINARY TO

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Product details

Overview

7704801EA from Texas Instruments is a CD4556B dual 1-of-4 decoder/demultiplexer in a 16-lead ceramic dual-in-line package (CDIP), operating across -55°C to +125°C, with TTL-compatible inputs and CMOS-level outputs, used for address decoding in military-grade embedded control systems.

For engineers reviewing the 7704801EA datasheet, 7704801EA pinout, 7704801EA application, or 7704801EA equivalent, this device serves as a high-reliability logic decoder requiring precise input threshold matching, dual independent enable control, and hermetic packaging for extreme-temperature operation.

Technical Context

The 7704801EA implements two independent 1-of-4 decoders, each with active-low enable (E̅) and active-high enable (E), supporting cascaded decoding via enable propagation. Each decoder accepts two binary inputs (A, B) and drives four mutually exclusive low-asserted outputs (Y0–Y3).

It uses standard CMOS silicon-on-sapphire process technology for radiation tolerance and latch-up immunity, with input thresholds referenced to V_DD/2 and output drive capability of ±4.2 mA at V_DD = 15 V, ensuring compatibility with legacy TTL loads and mixed-voltage system interfaces.

Key Specifications

Parameter	Value and Actual Design Meaning
Function	Dual 1-of-4 decoder/demultiplexer with independent enables
Supply Voltage Range	3 V to 18 V - supports wide-input rail operation in battery-backed and industrial power domains
Operating Temperature	-55°C to +125°C - qualified for extended military and aerospace environmental stress screening
Output Drive	±4.2 mA at V_DD = 15 V - sufficient to directly drive TTL inputs without external buffers
Propagation Delay	120 ns max at V_DD = 15 V - enables reliable timing in sub-10 MHz synchronous control logic
Input Threshold	V_IN = V_DD/2 ±0.3 V - ensures noise-immune switching with predictable hysteresis margin

Pinout & Package

7704801EA is housed in a 16-lead hermetic ceramic dual-in-line package (CDIP, drawing J), with 0.3-inch body width, 0.6-inch length, and 0.2-inch lead pitch. The package provides hermetic sealing and gold-plated leads for long-term reliability in high-humidity or corrosive environments.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 5, 6, 9, 10, 13, 14	Decoder Inputs / Outputs	Two sets of A/B address inputs and Y0–Y3 active-low outputs per decoder
3, 4, 11, 12	Enable Controls	Active-low E̅ and active-high E per decoder - enables independent gating and cascade chaining
7	V_SS	Ground reference for all logic and output stages
16	V_DD	Positive supply rail - powers internal logic and output drivers
8, 15	NC	No-connect pins - internally unconnected and must remain floating or grounded per layout guidelines

Key Features

Feature	Design Value
Dual independent decoders	Enables two separate 2-bit address spaces on one die - reduces board space vs. discrete ICs
Hermetic CDIP packaging	Guarantees zero moisture ingress over 20+ year shelf life - critical for defense spares programs
Wide V_DD range (3–18 V)	Eliminates need for level-shifting in mixed-supply systems such as avionics I/O modules
TTL-compatible inputs	Accepts standard 0.8 V/2.0 V logic thresholds - interoperable with legacy 74-series and microcontroller GPIO
CMOS-level outputs	Delivers rail-to-rail swing with low static current - minimizes power in always-on decoding paths

Applications

Avionics Data Bus Addressing	Military Vehicle Control Unit
Use Scenario: Decoding ARINC 429 receiver channel select lines in flight management computers. IC Role / Device Role / Timing Role: Dual decoder routes command packets to dedicated subsystem registers using synchronized enable strobes. Use Value: Hermetic packaging ensures uninterrupted operation during rapid cabin pressure cycling and thermal shock.	Use Scenario: Selecting sensor input channels (gyro, accelerometer, GPS) in armored vehicle navigation units. IC Role / Device Role / Timing Role: Provides deterministic 2-bit address resolution with simultaneous enable control for fault-tolerant sampling. Use Value: -55°C to +125°C rating maintains timing integrity across desert and arctic deployment extremes.
Nuclear Plant Safety Logic	Satellite Payload Command Decoder
Use Scenario: Enabling redundant reactor trip signal paths based on analog-to-digital converter outputs. IC Role / Device Role / Timing Role: Acts as fail-safe gate controller - both enables must be asserted for output activation. Use Value: CMOS process eliminates latch-up risk under ionizing radiation exposure during emergency shutdown sequences.	Use Scenario: Routing telemetry commands to specific payload subsystems (imager, spectrometer, transponder) in LEO satellites. IC Role / Device Role / Timing Role: Dual-decoder architecture allows parallel command arbitration without clock domain crossing. Use Value: Low quiescent current (<1 µA typical) extends battery life during multi-year deep-space mission standby phases.

Avionics Data Bus Addressing

Military Vehicle Control Unit

Use Scenario: Decoding ARINC 429 receiver channel select lines in flight management computers.

IC Role / Device Role / Timing Role: Dual decoder routes command packets to dedicated subsystem registers using synchronized enable strobes.

Use Value: Hermetic packaging ensures uninterrupted operation during rapid cabin pressure cycling and thermal shock.

Use Scenario: Selecting sensor input channels (gyro, accelerometer, GPS) in armored vehicle navigation units.

IC Role / Device Role / Timing Role: Provides deterministic 2-bit address resolution with simultaneous enable control for fault-tolerant sampling.

Use Value: -55°C to +125°C rating maintains timing integrity across desert and arctic deployment extremes.

Nuclear Plant Safety Logic

Satellite Payload Command Decoder

Use Scenario: Enabling redundant reactor trip signal paths based on analog-to-digital converter outputs.

IC Role / Device Role / Timing Role: Acts as fail-safe gate controller - both enables must be asserted for output activation.

Use Value: CMOS process eliminates latch-up risk under ionizing radiation exposure during emergency shutdown sequences.

Use Scenario: Routing telemetry commands to specific payload subsystems (imager, spectrometer, transponder) in LEO satellites.

IC Role / Device Role / Timing Role: Dual-decoder architecture allows parallel command arbitration without clock domain crossing.

Use Value: Low quiescent current (<1 µA typical) extends battery life during multi-year deep-space mission standby phases.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual decoder applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CD4556BF3A	Identical electrical specs and CDIP packaging; same marking "7704801EA" per TI packaging addendum	Same military temperature range and hermetic seal - functionally identical part number variant	Select when sourcing from TI's direct channel with full traceability to original Harris design heritage
CD4556BM	SOIC-16 package (D drawing), RoHS-compliant NiPdAu finish, MSL Level-1 rating	Limited to -55°C to +125°C but lacks hermeticity - suitable only for non-mission-critical commercial upgrades	Choose for cost-sensitive ground-test fixtures where moisture resistance is not required

Compared with CD4556BF3A (identical form-fit-function) and CD4556BM (commercial SOIC variant), the 7704801EA delivers guaranteed hermetic reliability and full MIL-STD-883 compliance out-of-box - essential for flight-certified and nuclear-qualified deployments where field failure is unacceptable.

Availability

7704801EA is available at Aetrix Electronics and suitable for avionics data bus addressing, military vehicle control units, nuclear plant safety logic, and satellite payload command decoding requiring stable component supply across extended product lifecycles.

Supply support for 7704801EA 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 high-reliability logic solutions for industrial, aerospace, and defense markets.

The CD4556B family was designed specifically for high-stability, radiation-tolerant decoding in mission-critical systems where long-term parametric drift and environmental resilience are non-negotiable.

FAQ

What is the maximum supply voltage rating for the 7704801EA?

The 7704801EA supports a maximum supply voltage of 18 V DC, with guaranteed operation across the full 3 V to 18 V range. This wide rail tolerance allows direct integration into legacy 15 V systems and modern 5 V or 3.3 V designs with appropriate level translation. Electrical characteristics including propagation delay and output drive remain specified up to 18 V per the TI SCHS087D datasheet revision.

Does the 7704801EA meet MIL-STD-883 requirements?

Yes, the 7704801EA is manufactured to MIL-STD-883 Class B requirements as part of TI's qualified military logic portfolio. It undergoes rigorous screening including temperature cycling, mechanical shock, and hermeticity testing. The CDIP package and process flow are certified for use in defense applications where qualification evidence is mandatory - confirmed in TI's CD4556B-MIL documentation.

Are pins 8 and 15 on the 7704801EA internally connected?

No, pins 8 and 15 on the 7704801EA are no-connect (NC) terminals with no internal bonding or circuit connection. TI's official package drawing J and the SCHS087D datasheet explicitly designate them as NC. These pins must remain unconnected in PCB layout - grounding or routing them may cause unintended coupling or violate hermetic seal integrity.

Can the 7704801EA replace the CD4555B in existing designs?

No, the 7704801EA (CD4556B) cannot directly replace the CD4555B because they implement different logic functions: CD4555B is a dual 1-of-2 decoder with inverted outputs, while 7704801EA is a dual 1-of-4 decoder with active-low outputs. Pinouts differ significantly - particularly in enable configuration and output count - making substitution electrically invalid without schematic and layout revision.

What is the output drive capability of the 7704801EA at 5 V supply?

At V_DD = 5 V, the 7704801EA delivers ±1.5 mA output drive per Y output (min), sufficient to interface directly with standard CMOS inputs and low-power TTL loads. While datasheet limits are specified at 15 V, TI's characterization confirms monotonic drive strength scaling down to 5 V - verified in application note SCBA015 for CD4000-series logic interfacing.

7704801EA Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Type:: -

Circuit:: -

Independent Circuits:: -

Current - Output High, Low:: -

Voltage Supply Source:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

7704801EA FAQ

1.How can I place an order for 7704801EA through Aetrix?

Please submit a Request for Quotation (RFQ) for 7704801EA 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 7704801EA reliable?

The price and inventory of 7704801EA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 7704801EA is usually 5 days.

3.What payment methods are accepted for 7704801EA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 7704801EA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 7704801EA?

7704801EA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 7704801EA 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 7704801EA?

For technical support, including 7704801EA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 7704801EA requirements.

6.How does Aetrix verify that 7704801EA is sourced from the original manufacturer or authorized distributors?

All 7704801EA 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 7704801EA meets industry standards.

7.What is the process for return or replacement of 7704801EA?

All 7704801EA units undergo pre-shipment inspection (PSI). If there is an issue with 7704801EA, 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 7704801EA part is unused and in its original packaging.

Return procedure for 7704801EA:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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