Texas Instruments CD4555BNSR

Overview

CD4555BNSR from Texas Instruments is a dual 1-of-4 decoder/demultiplexer IC in a 16-pin SOP (NS) package, operating across –55°C to +125°C, with TTL-compatible inputs and CMOS-level outputs. It accepts two binary address inputs and enables one of four active-low outputs per section, supporting high-noise-immunity logic control in industrial timing and address selection circuits.

For engineers reviewing the CD4555BNSR datasheet, CD4555BNSR pinout, CD4555BNSR application, or CD4555BNSR equivalent, this device is evaluated for dual-channel address decoding, low-power logic distribution, and legacy system compatibility where wide temperature range and RoHS-compliant packaging are required.

Technical Context

The CD4555BNSR implements two independent 1-of-4 decoders, each with separate enable (E1, E2) and address (A0, A1) inputs. Each decoder drives four active-low outputs (Y0–Y3), with output states fully defined under all input combinations including disabled states (all outputs high).

It uses standard CMOS silicon-gate technology with buffered inputs, ensuring symmetrical propagation delays (typ. 35 ns at 5 V, CL = 50 pF), rail-to-rail output swing, and static discharge protection per MIL-STD-883 Class 3015.2.

Key Specifications

Pinout & Package

SOP-16 (NS) package: 16-pin small-outline plastic package, 1.27 mm pitch, 10.4 mm × 5.3 mm body, 2.00 mm max height, 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 CD4555BE and CD4555BM96, the CD4555BNSR provides identical decoding functionality in a narrower SOP-16 package optimized for high-density SMT layouts, while maintaining full electrical equivalence and industrial temperature qualification.

Availability

CD4555BNSR is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and legacy embedded system upgrades requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for CD4555BNSR 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 industrial-grade IC design and manufacturing.

The CD4555BNSR belongs to TI's legacy CMOS logic family, designed for reliability-critical applications demanding wide temperature operation, high noise immunity, and long-term supply stability in industrial and automotive systems.

FAQ

What is the function of CD4555BNSR?

The CD4555BNSR is a dual 1-of-4 decoder/demultiplexer IC that accepts two binary address inputs and an active-high enable per section to assert one of four active-low outputs. Each decoder operates independently, enabling simultaneous address decoding for two peripheral groups without interaction. Its CMOS architecture ensures low power consumption and rail-to-rail output swing across its full 3 V to 18 V supply range.

Does CD4555BNSR support 5 V TTL-level inputs?

Yes, CD4555BNSR supports TTL-compatible inputs at 5 V supply: VIL is specified ≤1.5 V and VIH ≥3.5 V, providing >1.5 V noise margin. Input thresholds scale proportionally with VDD, so it maintains compatibility across 3 V to 18 V operation. No external level shifters are needed when interfacing with standard 5 V TTL or CMOS logic families.

What is the maximum operating temperature for CD4555BNSR?

The CD4555BNSR is rated for continuous operation from –55°C to +125°C. This extended temperature range is verified per TI's qualification standards and applies to the SOP-16 (NS) package variant. It enables deployment in under-hood automotive modules, industrial motor controls, and outdoor instrumentation where ambient thermal stress exceeds commercial-grade limits.

Is CD4555BNSR pin-compatible with CD4555BE?

No, CD4555BNSR is not pin-compatible with CD4555BE. While both share identical logic functionality and pin numbering, CD4555BE uses a 16-pin PDIP (N) package with 2.54 mm pitch and through-hole mounting, whereas CD4555BNSR uses a 16-pin SOP (NS) package with 1.27 mm pitch and surface-mount footprint. Land patterns, soldering methods, and mechanical clearances differ significantly.

What is the typical propagation delay of CD4555BNSR at 5 V?

The typical propagation delay of CD4555BNSR is 35 ns at VDD = 5 V with CL = 50 pF load, measured from input transition to valid output transition. The maximum delay is 120 ns under worst-case conditions (VDD = 5 V, TA = 125°C). These values are confirmed in the TI SCHS087D datasheet and apply uniformly to both decoder sections.