CD4543BM96 from Texas Instruments, in a SOIC-16. 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	LD	input	Latch Disable input. When LD=1 the input BCD data is latched; when LD=0 the outputs are transparent to the BCD inputs. Active-high latch-disable per the truth table.
2	C	input	BCD data input C (weight 2^2). CMOS logic input with typical input capacitance 5 pF; VIH >= 3.5 V at VDD=5 V.
3	B	input	BCD data input B (weight 2^1). CMOS logic input, VIH >= 3.5 V at VDD=5 V.
4	D	input	BCD data input D (weight 2^3, MSB). CMOS logic input, VIH >= 3.5 V at VDD=5 V.
5	A	input	BCD data input A (weight 2^0, LSB). CMOS logic input, VIH >= 3.5 V at VDD=5 V.
6	PHASE	input	Phase input (Ph). For LCD readouts apply a square wave (typ. 30-200 Hz) equal to the LCD backplane. For common-cathode LEDs set Ph=0; for common-anode LEDs set Ph=1. Controls output-polarity XOR stage.
7	BL	input	Blanking input (BI). BI=1 forces all seven segment outputs to the blank state regardless of BCD inputs; BI=0 enables normal decode. Tie to VSS for pin-for-pin CD4056B replacement.
8	VSS	power_in	Negative supply / ground reference. All voltages are referenced to VSS.
9	a	output	Seven-segment display output 'a'. CMOS push-pull output capable of driving LCD segments, LEDs, or TTL/HTL loads; typical IOH ~-0.75 mA and IOL ~1 mA at VDD=5 V.
10	b	output	Seven-segment display output 'b'. CMOS push-pull; drives LCD, LED, or logic loads.
11	c	output	Seven-segment display output 'c'. CMOS push-pull; drives LCD, LED, or logic loads.
12	d	output	Seven-segment display output 'd'. CMOS push-pull; drives LCD, LED, or logic loads.
13	e	output	Seven-segment display output 'e'. CMOS push-pull; drives LCD, LED, or logic loads.
14	g	output	Seven-segment display output 'g'. CMOS push-pull; drives LCD, LED, or logic loads.
15	f	output	Seven-segment display output 'f'. CMOS push-pull; drives LCD, LED, or logic loads.
16	VDD	power_in	Positive supply. Recommended operating range 3 V to 18 V; absolute maximum 20 V referenced to VSS. Bypass with a local ceramic capacitor.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-16
Category	LED-drv
Pins	16

Ordering variants

Same part, different packaging or reel option.

CD4543BM96M
CD4543BM96
CD4543BM96NSR
CD4543BM96E
CD4543BM96PW
CD4543BM96PWR
CD4543BM96MT

CAD (KiCad official)

Symbol: CD4543BM96
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cd4543bm96.step`	217 KB	You want the bare part, or you mark your own boards.
`cd4543bm96-etched.step`	2.7 MB	You want the part with `CD4543BM96` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 670 faces against 267 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 1b246395cfbd8b03, 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