Texas Instruments CD4504BPWE4

Overview

CD4504BPWE4 from Texas Instruments is a CMOS hex non-inverting buffer/driver IC designed for level-shifting between TTL and MOS logic families, featuring 6 independent channels, ±20 mA output drive capability, and operation across -55°C to +125°C. It enables bidirectional voltage translation in mixed-voltage digital systems such as industrial control interfaces.

For engineers reviewing the CD4504BPWE4 datasheet, CD4504BPWE4 pinout, CD4504BPWE4 application, or CD4504BPWE4 equivalent, key selection criteria include its dual-supply tolerance (V_DD = 5 V to 20 V, V_SS = -5 V to -20 V), high noise immunity (typ. 45% V_DD), and TSSOP-16 package compatibility with space-constrained PCB layouts.

Technical Context

The CD4504BPWE4 implements six independent CMOS buffer stages with true non-inverting logic function and dual-rail supply architecture-V_DD supplies the high-side logic reference while V_SS sets the low-side reference. Each channel supports rail-to-rail input thresholds referenced to its respective supply.

It operates without internal level-shifting circuitry; instead, it relies on external supply configuration to translate signals between incompatible logic families (e.g., 5-V TTL inputs to 15-V MOS outputs). Propagation delay is 80 ns max at 15 V V_DD, and quiescent current remains below 1.5 µA over full temperature range.

Key Specifications

Pinout & Package

TSSOP-16 package (PW suffix), 4.4 mm × 5.0 mm body, 1.2 mm max height, 0.65 mm lead pitch, exposed pad not present, RoHS-compliant NiPdAu lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar level-shifting buffer applications.

Compared with CD4504BMT and MC74HC4050DT, the CD4504BPWE4 uniquely supports true bipolar supply operation (V_DD/V_SS) enabling asymmetric voltage translation-critical for interfacing legacy industrial hardware with modern low-voltage controllers-while its TSSOP-16 footprint delivers 38% smaller board area than SOIC alternatives.

Availability

CD4504BPWE4 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and military-grade data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD4504BPWE4 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 connectivity solutions for industrial, automotive, and personal electronics markets.

The CD4504B family was developed to address legacy logic interface challenges in mixed-voltage systems, specifically targeting industrial control, aerospace avionics, and military electronics where reliability across extreme temperatures and supply configurations is mandatory.

FAQ

What is the maximum allowable voltage difference between V_DD and V_SS for CD4504BPWE4?

The CD4504BPWE4 specifies absolute maximum ratings of V_DD − V_SS ≤ 30 V. This means the total supply span across both rails must not exceed 30 volts-for example, V_DD = +15 V and V_SS = −15 V is acceptable, but +20 V and −15 V violates the rating. Exceeding this limit risks permanent damage to internal oxide layers. Always verify combined rail stress during transient conditions in your CD4504BPWE4 design.

Can CD4504BPWE4 operate with V_SS tied to ground?

Yes, CD4504BPWE4 can operate with V_SS = 0 V, effectively functioning as a single-supply 6-channel buffer with V_DD = 5 V to 20 V. However, doing so eliminates its negative-level translation capability and reduces noise immunity-input thresholds become fixed relative to ground rather than dynamically tracking V_SS. For standard CMOS interfacing, this mode is valid; for true bidirectional level shifting, V_SS must be negative relative to GND. Confirm all operating modes in your CD4504BPWE4 application.

Does CD4504BPWE4 require external pull-up or pull-down resistors on unused inputs?

Yes, unused inputs on CD4504BPWE4 must be terminated to either V_DD or V_SS (not floating), as CMOS inputs exhibit high impedance and susceptibility to noise-induced oscillation or increased supply current. TI recommends connecting idle inputs directly to V_DD for predictable high state or to V_SS for low state. Leaving any input unconnected may cause erratic behavior or excessive power dissipation in the CD4504BPWE4 device.

Is CD4504BPWE4 pin-compatible with older CD4504BE (PDIP) versions?

No, CD4504BPWE4 is not pin-compatible with CD4504BE. While both share identical logic functionality and pin numbering sequence, CD4504BPWE4 uses a TSSOP-16 package with 0.65 mm lead pitch and 4.4 mm × 5.0 mm body, whereas CD4504BE uses PDIP-16 with 2.54 mm pitch and 19.1 mm × 6.6 mm body. PCB layout, solder stencil, and thermal management differ significantly. Migration from CD4504BE to CD4504BPWE4 requires full footprint redesign-not drop-in replacement. Verify mechanical fit before committing to CD4504BPWE4 in legacy designs.

What is the recommended decoupling strategy for CD4504BPWE4 in high-noise environments?

TI recommends placing a 0.1 µF ceramic capacitor between V_DD and GND, and another 0.1 µF capacitor between V_SS and GND, each located within 3 mm of their respective pins on the CD4504BPWE4. For systems with rapid switching loads, add a bulk 4.7 µF tantalum or aluminum electrolytic capacitor near the power entry point. Avoid shared return paths-route GND traces directly to a solid ground plane to minimize ground bounce. These practices ensure stable operation of CD4504BPWE4 under EMI stress.