Texas Instruments CD4541BM96E4

Overview

CD4541BM96E4 from Texas Instruments is a CMOS programmable timer IC with built-in RC oscillator, 16-stage binary counter, and selectable frequency division (2⁸ to 2¹⁶) or single-transition timing modes. It operates from 3V to 18V, supports AUTO/MANUAL reset, and delivers symmetrical 100Ω output drive at 15V - used in precision power-on delay, retriggerable one-shot, and programmable clock division circuits.

For engineers reviewing the CD4541BM96E4 datasheet, CD4541BM96E4 pinout, CD4541BM96E4 application, or CD4541BM96E4 equivalent, key selection criteria include its 14-pin SOIC package, VDD range up to 18V, RC-oscillator frequency tuning (DC–100 kHz), Q/Q output logic flexibility, and low-quiescent-current operation (≤0.08 μA at 20V) for battery-sensitive timing functions.

Technical Context

The CD4541BM96E4 implements a 16-bit binary counter driven by either its internal RC oscillator (tuned via RTC, CTC, RS) or an external clock applied to Pin 3. Its MODE input selects between continuous square-wave division (2^N) or single-transition timing (2^N−1 counts before output transition).

Time-select inputs A and B configure N = 8, 10, 13, or 16 stages; Q/Q SELECT chooses active-high or active-low output polarity; AUTO RESET (Pin 5) enables power-on initialization but increases quiescent current, while MASTER RESET (Pin 6) provides synchronous manual reset with pulse-width requirements of 85 ns (at 15V).

Key Specifications

Pinout & Package

CD4541BM96E4 is housed in a 14-pin SOIC (D) package per JEDEC MS-012 AB, 3.90 mm body width, 1.75 mm max height, 1.27 mm lead pitch, and tape-and-reel packaging (2500 pcs/reel). Pin 1 is located at top-left corner with quadrant Q1 orientation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable timer applications.

Compared with CD4541BE and CD4541BMT, the CD4541BM96E4 offers identical core functionality and SOIC-14 compatibility but is optimized for high-volume automated assembly via 2500-piece tape-and-reel delivery, reducing pick-and-place changeover frequency and lowering per-unit handling cost in mass production.

Availability

CD4541BM96E4 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, medical device power sequencing, and battery-powered IoT sensors requiring stable component supply across extended temperature ranges and long lifecycle commitments.

Supply support for CD4541BM96E4 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 high-reliability logic solutions for industrial, automotive, and aerospace markets.

The CD4541BM96E4 belongs to TI's CD4000-series CMOS logic family, designed for robust, low-power timing and counting functions in harsh environments where voltage tolerance, temperature resilience, and long-term reliability are critical.

FAQ

What is the maximum operating voltage for CD4541BM96E4?

The CD4541BM96E4 has an absolute maximum VDD rating of +20V and is specified to operate continuously from 3V to 18V. At 15V supply, it delivers 12.6 mA output sink current and maintains propagation delays below 2.9 μs for 2¹⁶ division mode. Exceeding 18V risks exceeding parametric limits even if within absolute maximum ratings.

Can CD4541BM96E4 be used with an external crystal oscillator?

Yes - CD4541BM96E4 accepts external clock signals on Pin 3 (CLK IN), supporting frequencies up to 6 MHz at VDD=15V. While it does not contain crystal oscillator circuitry internally, it can interface with a buffered crystal oscillator module or CMOS-compatible crystal driver to replace the internal RC oscillator for improved frequency stability and accuracy.

How do I configure CD4541BM96E4 for a 1-second timing interval?

To achieve ~1 second with CD4541BM96E4, configure A=1, B=1 (selecting 2¹⁶ = 65536 division), set MODE=0 (single-transition), and tune the RC oscillator to ≈15.26 kHz using RTC, CTC, and RS. The output will transition high after 2¹⁵ = 32768 counts. Confirm timing with oscilloscope measurement, as actual interval depends on component tolerances and temperature drift.

Does CD4541BM96E4 require external pull-up resistors on its outputs?

No - CD4541BM96E4 features symmetrical CMOS output drivers with 100Ω typical impedance at 15V, capable of directly sourcing/sinking up to 20 mA. Pull-ups are unnecessary unless interfacing with open-drain logic families or level-shifting to non-CMOS voltages; standard LPTTL, LS TTL, and HTL loads connect directly.

What is the purpose of the RS resistor in the CD4541BM96E4 oscillator circuit?

The RS resistor (Pin 2) biases the internal oscillator amplifier to ensure stable oscillation across temperature and voltage. Per datasheet, RS ≥ 10 kΩ is mandatory; values too low cause erratic startup or frequency drift, while excessively high values increase sensitivity to noise. Typical value is 10–100 kΩ, selected alongside RTC and CTC to meet target f = 1/(2.3 × RTC × CTC).