XL9535 from XINLUDA, in a TSSOP-24. 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	INT	output	Active-LOW open-drain interrupt output. Asserted when any input pin state differs from its corresponding Input Port register value. Requires an external pull-up resistor to Vcc; IOL = 3 mA at VOL = 0.4 V.
2	A1	input	Hardware I2C slave-address select bit 1. Must be tied directly to Vcc or GND (never floating) and must not change while device is powered. Sets bit 2 of the 7-bit slave address (base 0x20).
3	A2	input	Hardware I2C slave-address select bit 2. Must be tied directly to Vcc or GND (never floating). Sets bit 3 of the 7-bit slave address (base 0x20).
4	P00	bidirectional	Port 0 bit 0. Push-pull GPIO, configured as input at power-on. Per-I/O limit 25 mA; VIH = 0.7xVcc, VIL = 0.3xVcc; IOL up to 25 mA, IOH up to -10 mA.
5	P01	bidirectional	Port 0 bit 1. Push-pull GPIO, configured as input at power-on. Same drive limits as P00.
6	P02	bidirectional	Port 0 bit 2. Push-pull GPIO, configured as input at power-on.
7	P03	bidirectional	Port 0 bit 3. Push-pull GPIO, configured as input at power-on.
8	P04	bidirectional	Port 0 bit 4. Push-pull GPIO, configured as input at power-on.
9	P05	bidirectional	Port 0 bit 5. Push-pull GPIO, configured as input at power-on.
10	P06	bidirectional	Port 0 bit 6. Push-pull GPIO, configured as input at power-on.
11	P07	bidirectional	Port 0 bit 7. Push-pull GPIO, configured as input at power-on. Total sourced current on P07-P00 must be limited to 80 mA.
12	GND	power_in	Supply ground (0 V reference).
13	P10	bidirectional	Port 1 bit 0. Push-pull GPIO, configured as input at power-on.
14	P11	bidirectional	Port 1 bit 1. Push-pull GPIO, configured as input at power-on.
15	P12	bidirectional	Port 1 bit 2. Push-pull GPIO, configured as input at power-on.
16	P13	bidirectional	Port 1 bit 3. Push-pull GPIO, configured as input at power-on.
17	P14	bidirectional	Port 1 bit 4. Push-pull GPIO, configured as input at power-on.
18	P15	bidirectional	Port 1 bit 5. Push-pull GPIO, configured as input at power-on.
19	P16	bidirectional	Port 1 bit 6. Push-pull GPIO, configured as input at power-on.
20	P17	bidirectional	Port 1 bit 7. Push-pull GPIO, configured as input at power-on. Total sourced current on P17-P10 must be limited to 80 mA.
21	A0	input	Hardware I2C slave-address select bit 0. Must be tied directly to Vcc or GND (never floating). Sets bit 1 of the 7-bit slave address (base 0x20, giving 0x20..0x27).
22	SCL	input	I2C-bus serial clock input. Requires external pull-up to Vcc. Supports standard-mode (100 kHz) and fast-mode (400 kHz); VIH = 0.7xVcc, VIL = 0.3xVcc, 5 V tolerant.
23	SDA	bidirectional	I2C-bus serial data line (open-drain). Requires external pull-up to Vcc. IOL >= 3 mA at VOL = 0.4 V; 5 V tolerant.
24	VCC	power_in	Positive supply voltage, 2.3 V to 5.5 V. Typical ICC = 135 uA (max 200 uA) at 5.5 V with fSCL = 100 kHz; standby current typ 0.25 uA.

Key specifications

Parameter	Value
Manufacturer	XINLUDA
Package	TSSOP-24
Category	Interface
Pins	24

Ordering variants

Same part, different packaging or reel option.

XL9535D
XL9555D
XL9535SS
XL9555SS
XL9535
XL9555
XL9535QF24
XL9555QF24

CAD (KiCad official)

Symbol: XL9535
Footprint: Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm
3D model: TSSOP-24 (KiCad packages3D, STEP)

Provenance

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

Datasheet: XINLUDA datasheet (25 pp, sha256 80ea36f92c4bf704, retrieved 2026-08-17, tier: lcsc)
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