CD4541BM96 from Texas Instruments, in a SOIC-14. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	RTC	passive	Timing resistor (RTC) connection for the internal RC oscillator. RTC together with CTC sets the oscillator frequency f = 1/(2.3 * RTC * CTC), valid between 1kHz and 100kHz. Can also serve as an external clock input on pin 3 when RS is used as the clock pin.
2	CTC	passive	Timing capacitor (CTC) connection for the internal RC oscillator. Sets the oscillator frequency together with RTC per f = 1/(2.3 * RTC * CTC).
3	RS	passive	Oscillator series/isolation resistor input. RS is recommended to be >= 10 kΩ and approximately 2*RTC. Pin 3 can also be driven with an external clock in place of the internal oscillator.
4	NC	unconnected	No internal connection.
5	AUTO_RESET	input	Auto-reset enable input. Logic 0 enables the automatic power-on reset circuit; logic 1 disables auto reset. With AUTO RESET enabled, an additional supply current is drawn (typ 7uA @5V, 30uA @10V, 80uA @15V). VDD should be > 5V for reliable auto power-on reset.
6	MASTER_RESET	input	Active-high master reset. A logic 1 pulse resets the internal counters and latch (Master Reset On); logic 0 = Master Reset Off. Minimum reset pulse width is 300 ns @5V, 100 ns @10V, 85 ns @15V (typ).
7	VSS	power_in	Negative supply / ground reference (0 V). All voltages are referenced to VSS.
8	OUTPUT	output	Timer output (Q or Q-bar depending on Q/Q-SELECT). Drives up to six low-power TTL loads, three low-power Schottky loads, or six HTL loads over the rated temperature range. Symmetrical output resistance typically 100 Ω at VDD = 15V.
9	Q/Q_SELECT	input	Output polarity select. Logic 0 = output initially low after reset (Q); logic 1 = output initially high after reset (Q-bar).
10	MODE	input	Output mode select. Logic 0 selects single-transition mode: after MASTER RESET the output changes state once after 2^(N-1) counts and remains until the next MASTER RESET or MODE=1. Logic 1 selects recycle mode: continuous square wave with frequency = oscillator/2^N.
11	NC	unconnected	No internal connection.
12	A	input	Frequency (stage) select input A. Together with B selects the counter tap N per the Frequency Selection Table: A/B = 00 -> N=13 (2^13 = 8192), 01 -> N=10 (1024), 10 -> N=8 (256), 11 -> N=16 (65536).
13	B	input	Frequency (stage) select input B. See input A for the A/B -> N mapping.
14	VDD	power_in	Positive supply. Operating range 3V (min) to 18V (typ), absolute max 20V referenced to VSS. Quiescent current 0.04 uA typ (5 uA max at 5V, 20 uA max at 15V).

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-14
Category	RTC
Pins	14

Ordering variants

Same part, different packaging or reel option.

CD4541BM96
CD4541BM96BME4
CD4541BM96BMG4
CD4541BM96BMT
CD4541BM96BMTG4
CD4541BM96BNSR
CD4541BM96BNSRG4
CD4541BM96BE
CD4541BM96BEE4
CD4541BM96BF
CD4541BM96BF3A
CD4541BM96BPW
CD4541BM96BPWR
CD4541BM96BPWRG4

CAD (KiCad official)

Symbol: CD4541BM96
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOIC-14 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cd4541bm96.step`	195 KB	You want the bare part, or you mark your own boards.
`cd4541bm96-etched.step`	2.4 MB	You want the part with `CD4541BM96` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 608 faces against 237 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (17 pp, sha256 d3a993c65b014aa0, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF