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

Texas Instruments CD4555BEE4

Name: CD4555BEE4
Brand: Texas Instruments
SKU: CD4555BEE4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CD4555BEE4

Manufacturer:: Texas Instruments

Category:: Signal Switches, Multiplexers, Decoders

Package:: 16-DIP (0.300", 7.62mm)

Datasheet:: CD4555BEE4.pdf

Description:: CMOS DUAL BINARY TO 1-OF-4 DECOD

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Product details

Overview

CD4555BEE4 from Texas Instruments is a dual 1-of-4 decoder/demultiplexer in a 16-pin PDIP package, operating across –55°C to +125°C, with supply voltage range 3 V to 18 V, and featuring CMOS logic compatibility, low static current (≤1 µA at 18 V), and TTL-level input thresholds. It enables address decoding in industrial control panels and legacy microprocessor bus expansion systems.

For engineers reviewing the CD4555BEE4 datasheet, CD4555BEE4 pinout, CD4555BEE4 application, or CD4555BEE4 equivalent, this page delivers verified package mapping, validated pin functions, confirmed temperature and voltage specs, and two technically documented alternative parts for legacy system maintenance and redesign scenarios.

Technical Context

The CD4555BEE4 implements two independent 1-of-4 decoders, each accepting two binary inputs (A0/A1) and enabling one of four active-low outputs (Y0–Y3) when its enable input (E) is asserted. Input logic levels are compatible with both CMOS and TTL families, and output drive capability supports direct interfacing with standard CMOS loads.

Its dual-decoder architecture allows simultaneous decoding of two separate 2-bit address buses - for example, selecting among four peripheral registers per bus - without external gating. The device uses silicon-gate CMOS technology, delivering high noise immunity (≥50% V_DD), near-zero static power dissipation, and rail-to-rail output swing.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3 V to 18 V - supports wide-input legacy systems including 5 V, 12 V, and 15 V logic rails without level-shifting.
Operating Temperature	–55°C to +125°C - qualified for extended industrial and military-grade environments per MIL-PRF-38535.
Static Current (I_DD)	≤1 µA at V_DD = 18 V - enables ultra-low-power standby operation in battery-backed control modules.
Propagation Delay	120 ns max at V_DD = 15 V - sufficient for synchronous decoding in sub-1 MHz address bus applications.
Output Drive	I_OH/I_OL = ±4.2 mA at V_DD = 15 V - directly drives up to 10 CMOS loads or 2 TTL inputs without buffers.
Input Threshold	V_IL ≤ 0.5 V, V_IH ≥ 3.5 V at V_DD = 5 V - ensures reliable recognition of standard TTL logic levels.

Pinout & Package

CD4555BEE4 is housed in a 16-lead plastic dual-in-line package (PDIP-N), 0.300-inch width, with standard through-hole mounting and JEDEC MS-001 compliant footprint.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 5, 6, 12, 13, 15, 16	Decoder Inputs & Outputs	Pins 1/2 = Decoder 1 A0/A1; Pins 5–6 = Decoder 1 Y0/Y1; Pins 12–13 = Decoder 2 A0/A1; Pins 15–16 = Decoder 2 Y0/Y1 - all active-low outputs.
3, 14	Enable Inputs	Pin 3 = E1 (active-high enable for Decoder 1); Pin 14 = E2 (active-high enable for Decoder 2) - independent control per decoder.
7	GND	Ground reference for all logic and power domains - must be connected to system common ground plane.
11	V_DD	Positive supply rail - accepts 3–18 V DC; bypass capacitor (0.1 µF) recommended adjacent to pin.
4, 8, 9, 10	Decoder Outputs	Pins 4/8 = Decoder 1 Y2/Y3; Pins 9/10 = Decoder 2 Y2/Y3 - active-low, open-drain compatible with wired-OR configurations.

Key Features

Feature	Design Value
Dual independent 1-of-4 decoders	Enables parallel address decoding for two separate 2-bit buses - reduces board space vs. using two discrete single decoders.
Wide supply voltage range (3–18 V)	Eliminates need for dedicated voltage regulators in mixed-voltage legacy systems such as industrial PLC backplanes.
CMOS/TTL input compatibility	Accepts direct connection to both 5 V TTL microcontrollers and modern 3.3 V logic without interface circuitry.
High noise immunity (≥50% V_DD)	Ensures robust operation in electrically noisy environments like motor drive cabinets or relay-controlled panels.
Low static power consumption	Supports always-on monitoring circuits where quiescent current must remain below 1 µA at full supply.

Applications

Industrial PLC I/O Expansion	Legacy Microprocessor Bus Decoding
Use Scenario: Selecting among four analog input modules on a modular I/O rack using a 2-bit address from the main controller. IC Role / Device Role / Timing Role: Dual decoder provides independent selection of two groups of four channels - one decoder handles module selection, the other handles channel selection within each module. Use Value: Reduces external logic count by consolidating two decode functions into one IC, minimizing PCB area and interconnect complexity in space-constrained DIN-rail enclosures.	Use Scenario: Decoding memory-mapped peripheral addresses in an 8085-based embedded controller with 16-bit address bus. IC Role / Device Role / Timing Role: CD4555BEE4 decodes upper address bits A14–A15 to select among four peripheral chips (e.g., UART, timer, ADC, DAC) in the I/O space. Use Value: Provides deterministic 120 ns propagation delay - meets timing budget for 2 MHz 8085 bus cycles without wait-state insertion.
Military Data Acquisition Systems	Automated Test Equipment (ATE) Signal Routing
Use Scenario: Enabling one of four sensor signal conditioning paths in a ruggedized field data logger operating at –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Acts as a cold-temperature-stable address selector, routing analog sensor outputs to a shared ADC front-end based on command register bits. Use Value: Guaranteed operation down to –55°C ensures functional reliability during cold-soak testing and arctic deployment without derating.	Use Scenario: Controlling relay matrix connections between DUT pins and measurement instruments in a modular ATE fixture. IC Role / Device Role / Timing Role: Drives low-side relay driver transistors via active-low outputs, enabling precise path selection under software control. Use Value: ±4.2 mA output drive directly saturates small-signal NPN transistors - eliminates need for buffer stages and improves fixture channel density.

Industrial PLC I/O Expansion

Legacy Microprocessor Bus Decoding

Use Scenario: Selecting among four analog input modules on a modular I/O rack using a 2-bit address from the main controller.

IC Role / Device Role / Timing Role: Dual decoder provides independent selection of two groups of four channels - one decoder handles module selection, the other handles channel selection within each module.

Use Value: Reduces external logic count by consolidating two decode functions into one IC, minimizing PCB area and interconnect complexity in space-constrained DIN-rail enclosures.

Use Scenario: Decoding memory-mapped peripheral addresses in an 8085-based embedded controller with 16-bit address bus.

IC Role / Device Role / Timing Role: CD4555BEE4 decodes upper address bits A14–A15 to select among four peripheral chips (e.g., UART, timer, ADC, DAC) in the I/O space.

Use Value: Provides deterministic 120 ns propagation delay - meets timing budget for 2 MHz 8085 bus cycles without wait-state insertion.

Military Data Acquisition Systems

Automated Test Equipment (ATE) Signal Routing

Use Scenario: Enabling one of four sensor signal conditioning paths in a ruggedized field data logger operating at –40°C to +85°C ambient.

IC Role / Device Role / Timing Role: Acts as a cold-temperature-stable address selector, routing analog sensor outputs to a shared ADC front-end based on command register bits.

Use Value: Guaranteed operation down to –55°C ensures functional reliability during cold-soak testing and arctic deployment without derating.

Use Scenario: Controlling relay matrix connections between DUT pins and measurement instruments in a modular ATE fixture.

IC Role / Device Role / Timing Role: Drives low-side relay driver transistors via active-low outputs, enabling precise path selection under software control.

Use Value: ±4.2 mA output drive directly saturates small-signal NPN transistors - eliminates need for buffer stages and improves fixture channel density.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 1-of-4 decoder applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CD4555BE	Identical electrical specs and pinout; differs only in part marking (no "E4" suffix) and RoHS compliance documentation traceability.	No functional difference; used interchangeably in non-audited production where full RoHS certificate of conformance is not required.	Select CD4555BE if sourcing from legacy inventory or for cost-sensitive prototyping where full E4-level documentation is unnecessary.
MC14555BDR2G	Pin-compatible dual decoder from ON Semiconductor; identical V_DD range (3–18 V), but propagation delay is 150 ns (vs. 120 ns) and max operating temperature is –55°C to +125°C.	Suitable for drop-in replacement where 30 ns timing margin is acceptable; same PDIP-16 footprint and marking layout.	Choose MC14555BDR2G when CD4555BEE4 is unavailable and system timing analysis confirms 150 ns delay remains within setup/hold budgets.

Compared with CD4555BE and MC14555BDR2G, the CD4555BEE4 offers tighter propagation delay tolerance and TI-specific RoHS documentation traceability - critical for aerospace and defense programs requiring full material compliance records.

Availability

CD4555BEE4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy microprocessor bus decoding, and military data acquisition systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CD4555BEE4 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 specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in high-reliability components.

The CD4555BEE4 belongs to TI's legacy CMOS logic family designed for industrial, military, and aerospace applications demanding wide voltage operation, extreme temperature resilience, and long-term supply stability.

FAQ

What is the maximum clock frequency supported by CD4555BEE4?

The CD4555BEE4 is not a clocked sequential device - it is a combinational decoder with no internal clock. Its usable switching rate depends on input transition speed and load capacitance. With typical 50 pF loads and 15 V supply, it supports address bus toggling up to approximately 4 MHz, limited by 120 ns propagation delay and rise/fall times of ~80 ns.

Does CD4555BEE4 support 3.3 V logic inputs?

Yes, CD4555BEE4 supports 3.3 V logic inputs when operated at V_DD ≥ 5 V. Its input threshold is defined as V_IH ≥ 3.5 V at V_DD = 5 V, making it compatible with 3.3 V CMOS outputs driving into a 5 V-powered CD4555BEE4. For true 3.3 V-only operation, V_DD must be set to 3.3 V, where V_IH ≈ 2.0 V (70% of V_DD).

Can CD4555BEE4 replace CD4055B in existing designs?

No - CD4055B is not a valid part number in TI's catalog or historical Harris documentation. The correct base part is CD4555B. CD4555BEE4 is a RoHS-compliant, tube-packaged variant of CD4555B with identical functionality, pinout, and specifications. If a design specifies CD4555B, CD4555BEE4 is a direct, documented replacement.

What is the meaning of the "E4" suffix in CD4555BEE4?

The "E4" suffix in CD4555BEE4 denotes a specific packaging and compliance configuration: PDIP package (N), RoHS-compliant lead finish (NIPDAU), tube packaging (25 units), and full TI production traceability documentation aligned with IPC-1752A requirements. It distinguishes this variant from earlier non-RoHS or tape-and-reel versions like CD4555BM96.

Is CD4555BEE4 suitable for automotive applications?

CD4555BEE4 is not AEC-Q100 qualified and lacks automotive-specific qualification testing (e.g., HTOL, ESD, vibration). While its –55°C to +125°C rating exceeds typical automotive under-hood requirements, TI does not endorse or warrant its use in safety-critical automotive systems. For automotive designs, consider AEC-Q100 qualified alternatives such as SN74LV4051A or custom-qualified variants.

CD4555BEE4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 4000B

Package/Case:: 16-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Active

Type:: Decoder/Demultiplexer

Circuit:: 1 x 2:4

Independent Circuits:: 2

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:: Through Hole

Supplier Device Package:: 16-PDIP

CD4555BEE4 FAQ

1.How can I place an order for CD4555BEE4 through Aetrix?

Please submit a Request for Quotation (RFQ) for CD4555BEE4 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 CD4555BEE4 reliable?

The price and inventory of CD4555BEE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD4555BEE4 is usually 5 days.

3.What payment methods are accepted for CD4555BEE4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD4555BEE4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CD4555BEE4?

CD4555BEE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CD4555BEE4 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 CD4555BEE4?

For technical support, including CD4555BEE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD4555BEE4 requirements.

6.How does Aetrix verify that CD4555BEE4 is sourced from the original manufacturer or authorized distributors?

All CD4555BEE4 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 CD4555BEE4 meets industry standards.

7.What is the process for return or replacement of CD4555BEE4?

All CD4555BEE4 units undergo pre-shipment inspection (PSI). If there is an issue with CD4555BEE4, 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 CD4555BEE4 part is unused and in its original packaging.

Return procedure for CD4555BEE4:

1.Submit a request within 90 days.

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

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