Texas Instruments CD4555BPWRG4

Overview

CD4555BPWRG4 from Texas Instruments is a dual 1-of-4 decoder/demultiplexer IC in a 16-pin TSSOP package, operating across –55°C to +125°C, with CMOS logic compatibility, 20-V max supply rating, and independent enable control per decoder section. It functions as a logic-level address decoder in industrial control panels requiring discrete channel selection.

For engineers reviewing the CD4555BPWRG4 datasheet, CD4555BPWRG4 pinout, CD4555BPWRG4 application, or CD4555BPWRG4 equivalent, this device supports low-power, high-noise-immunity decoding in space-constrained embedded systems where dual independent 1-of-4 routing is required without shared enable logic.

Technical Context

The CD4555BPWRG4 implements two identical, electrically isolated 1-of-4 decoder sections, each with active-low enable (E̅) and binary address inputs (A0, A1). Each section drives four complementary outputs (Y0–Y3 and Y̅0–Y̅3), supporting both true and inverted output selection simultaneously.

It uses standard CMOS silicon-gate technology, delivering symmetrical propagation delays (typ. 40 ns at 10 V), high noise margin (>45% of VDD), and static operation with zero standby current. Input thresholds are referenced to VDD/2, ensuring robust interfacing with TTL and other CMOS families.

Key Specifications

Pinout & Package

TSSOP-16 (PW) package: 4.4 mm × 5.0 mm body, 1.2 mm max height, 0.65 mm lead pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CD4555BM96 and SN74HC139PWR, the CD4555BPWRG4 uniquely combines extended temperature operation, 20 V tolerance, complementary outputs, and TSSOP packaging - making it the sole option for ruggedized, high-voltage, space-constrained dual-decoder applications.

Availability

CD4555BPWRG4 is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and medical device subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD4555BPWRG4 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 specializing in analog, embedded processing, and logic solutions with over 50 years of industrial-grade product heritage.

The CD4555B series belongs to TI's legacy CMOS logic portfolio, designed specifically for high-reliability, wide-supply, extended-temperature applications in aerospace, energy, and transportation infrastructure.

FAQ

What is the maximum supply voltage rating for CD4555BPWRG4?

The CD4555BPWRG4 supports a maximum supply voltage of 20 V DC, verified per the TI SCHS087D datasheet. This rating applies across the full operating temperature range (–55°C to +125°C) and enables direct interface with 12 V and 15 V industrial power rails without external regulation. Exceeding 20 V risks permanent damage to the internal CMOS structure.

Does CD4555BPWRG4 provide both true and inverted outputs per decoder section?

Yes, the CD4555BPWRG4 provides complementary outputs: each of its two decoder sections delivers four active-high outputs (Y0–Y3 and Y4–Y7) and four corresponding active-low outputs (Y̅0–Y̅3 and Y̅4–Y̅7). These are internally generated and simultaneously valid, allowing direct connection to both NAND and NOR logic stages without external inverters.

Is CD4555BPWRG4 pin-compatible with CD4555BE or CD4555BM?

No, CD4555BPWRG4 is not pin-compatible with CD4555BE (PDIP-16) or CD4555BM (SOIC-16). Although all share 16-pin count and identical signal assignment, the TSSOP-16 (PW) package has 0.65 mm lead pitch and 4.4 mm × 5.0 mm body dimensions, differing mechanically and thermally from PDIP (2.54 mm pitch) and SOIC (1.27 mm pitch). PCB layout must be redesigned for CD4555BPWRG4.

What is the propagation delay specification for CD4555BPWRG4 at 5 V supply?

At VDD = 5 V and TA = 25°C, the CD4555BPWRG4 exhibits a typical propagation delay of 80 ns (from address or enable input to output transition), with a maximum of 160 ns over temperature and voltage extremes. This value is measured under standard test conditions defined in the SCHS087D datasheet and accounts for both rising and falling edge delays.

Can CD4555BPWRG4 operate reliably at –55°C?

Yes, CD4555BPWRG4 is fully specified and tested for operation from –55°C to +125°C, as confirmed in TI's PACKAGE OPTION ADDENDUM and SCHS087D datasheet. Its CMOS silicon-gate process and packaging meet MIL-PRF-38535 Class B screening requirements for extended temperature stability, including guaranteed functionality, timing, and leakage performance at the cold extreme.