AS1115-BSST from Advanced Monolithic Systems, in a QSOP-24-150mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	SDA	bidirectional	Serial-data I/O, open-drain digital I/O I²C data pin.
2	DIG0	output	Digit drive line that sinks current from the display common cathode; keyscan detection optional but must be polled by the µProcessor.
3	DIG1	output	Digit drive line that sinks current from the display common cathode; keyscan detection optional but must be polled by the µProcessor.
4	DIG2	output	Digit drive line that sinks current from the display common cathode; keyscan detection optional but must be polled by the µProcessor.
5	DIG3	output	Digit drive line that sinks current from the display common cathode; keyscan detection optional but must be polled by the µProcessor.
6	GND	power_in	Ground.
7	DIG4	output	Digit drive line that sinks current from the display common cathode; keyscan detection optional but must be polled by the µProcessor.
8	DIG5	output	Digit drive line that sinks current from the display common cathode; keyscan detection optional but must be polled by the µProcessor.
9	DIG6	output	Digit drive line that sinks current from the display common cathode; keyscan detection optional but must be polled by the µProcessor.
10	DIG7	output	Digit drive line that sinks current from the display common cathode; keyscan detection optional but must be polled by the µProcessor.
11	KEYA	input	Keyscan input line for key readback; can be used for self-addressing.
12	KEYB	input	Keyscan input line for key readback.
13	ISET	passive	Sets peak segment current; connect to VDD or a reference voltage through RSET.
14	SCL	input	Serial-clock input, 3.4MHz maximum rate.
15	SEGA	output	Seven-segment drive line that sources current to the display.
16	SEGF	output	Seven-segment drive line that sources current to the display.
17	SEGB	output	Seven-segment drive line that sources current to the display.
18	SEGG	output	Seven-segment drive line that sources current to the display.
19	VDD	power_in	Positive supply voltage, connect to +2.7 to +5.5V supply.
20	SEGC	output	Seven-segment drive line that sources current to the display.
21	SEGE	output	Seven-segment drive line that sources current to the display.
22	SEGDP	output	Decimal point drive line that sources current to the display.
23	SEGD	output	Seven-segment drive line that sources current to the display.
24	IRQ	output	Interrupt request output, open drain pin.

Key specifications

Parameter	Value
Manufacturer	Advanced Monolithic Systems
Package	QSOP-24-150mil
Category	Nixie Tube Driver/LED Driver
Pins	24

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Operating Supply Voltage	VDD	2.7		5.5	V		5
Operating Temperature Range	TAMB	-40		85	°C		5
Operating Junction Temperature Range	TJ	-40		125	°C		5
Shutdown Supply Current	IDDSD		0.2	2	µA	All digital inputs at VDD or GND, TAMB = +25ºC	5
Shutdown Supply Current (85C)	IDDSD			4	µA	single digit, TAMB = +85ºC	5
Operating Supply Current	IDD		0.35	0.6	mA	RSET = open circuit.	5
Operating Supply Current, all segments on	IDD		335		mA	All segments and decimal point on; ISEG = -40mA.	5
Display Scan Rate	fOSC	0.48		0.96	kHz	8 digits scanned	5
Digit Drive Sink Current	IDIGIT		320		mA	VOUT = 0.65V	5
Segment Drive Source Current	ISEG	-35	-41	-47	mA	VDD = 5.0V, VOUT = (VDD -1V)	5
Segment Drive Current Matching	∆ISEG			3	%		5
Segment Drive Source Current Average	ISEG			47	mA	Average Current	5
Input Current SDA, SCL	IIH, IIL	-1		1	µA	VIN = 0V or VDD	5
Logic High Input Voltage SDA, SCL	VIH	0.7			xVDD	SDA, SCL	5
Logic Low Input Voltage SDA, SCL	VIL			0.3	xVDD	SDA, SCL	5
SDA Output Low Voltage	VOL(SDA)			0.4	V	ISINK = 3mA	5
Keyscan Open Input Voltage	VKEYopen	0.8			xVDD		5
Keyscan Short Input Voltage	VKEYshort			0.7	xVDD		5
Interrupt Output Low Voltage	VOL(IRQ)			0.4	V	ISINK = 3mA	5
Hysteresis Voltage	∆VI		1		V	DIN, CLK, LD/CS	5
Capacitive Load for each Bus Line	CB			550	pF		5
Open Detection Level Threshold		0.7	0.75	0.8	xVDD		5
Short Detection Level Threshold		0.05	0.1	0.15	xVDD		5
SCL Frequency	fSCL			1	MHz	CB = 550pF (max) on each Bus Line	6
Bus Free Time Between STOP and START Conditions	tBUF	500			ns		6
Hold Time for Repeated START Condition	tHOLDSTART	260			ns		6
SCL Low Period	tLOW	500			ns		6
SCL High Period	tHIGH	260			ns		6
Setup Time for Repeated START Condition	tSETUPSTART	260			ns		6
Data Setup Time	tSETUPDATA	50			ns		6
SDA + SCL Rise Time	tRISE			120	ns		6
SDA + SCL Fall Time	tFALL			120	ns		6
STOP Condition Setup Time	tSETUPSTOP	260			ns		6
Pulse Width of Spike Suppressed	tSPIKESUP			50	ns		6
Key Readback Debounce Time			20		ms		6
VDD to GND	VDD	-0.3		7	V		4
All other pins to GND		-0.3		7	V	7 or VDD + 0.3	4
DIG0:DIG7 Sink Current				500	mA		4
SEGA:SEGG, SEGDP Sink Current				100	mA		4
Input Current (latch-up immunity)		-100		100	mA	Norm: JEDEC 78	4
Electrostatic Discharge HBM		-1		1	kV	Norm: MIL 883 E method 3015	4
Junction Temperature				150	ºC		4
Storage Temperature Range		-55		150	ºC		4
Package Body Temperature				260	ºC		4
Humidity non-condensing		5		85	%		4
Thermal Resistance ΘJA	ΘJA		88		°C/W	on PCB, QSOP-24 package	4

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part	Material	Colour / plating	Datasheet says	Page
housing	PC		The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD020“Moisture/Reflow Sensitivity Classification for NonHermetic Solid State Surface Mount Devic	4
contacts		tin	The lead finish for Pb-free leaded packages is matte tin (100% Sn).	4

CAD (KiCad official)

Symbol: AS1115-BSST
Footprint: Package_SO:QSOP-24_3.9x8.7mm_P0.635mm
3D model: QSOP-24-150mil (KiCad packages3D, STEP)
3D model files: as1115-bsst-etched.step / as1115-bsst-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); as1115-bsst.step / as1115-bsst.glb are the bare package body.

Provenance

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

Datasheet: Advanced Monolithic Systems datasheet (26 pp, sha256 b0d6e65ddcfcde03, retrieved 2026-10-30, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

AS1115-BSST

Verified AS1115-BSST

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README