LTC4313IMS8-2#PBF from Analog Devices, in a MSOP-8. 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	ENABLE	input	Connection enable input; low isolates SDAIN/SCLIN from SDAOUT/SCLOUT, asserts READY low and disables rise time accelerators, high connects them after a stop bit or bus idle; connect to VCC if unused (10k to GND for staggered Hot Swap connectors).
2	SCLOUT	bidirectional	Serial Bus 2 clock input/output with external pull-up to a bus supply ≥ VCC for the LTC4313-2, connected to the SCL segment where stuck low recovery is desired; do not leave open.
3	SCLIN	bidirectional	Serial Bus 1 clock input/output connected to the upstream SCL line with external pull-up to a bus supply ≥ VCC for the LTC4313-2; do not leave open.
4	GND	power_in	Device ground.
5	READY	output	Open-drain N-channel connection ready status output that pulls low when input and output sides are disconnected, typically pulled up with 10k to the bus supply; leave open or tie to GND if unused (absolute max 6V, 50mA sink).
6	SDAIN	bidirectional	Serial Bus 1 data input/output connected to the upstream SDA line with external pull-up to a bus supply ≥ VCC for the LTC4313-2; do not leave open.
7	SDAOUT	bidirectional	Serial Bus 2 data input/output with external pull-up to a bus supply ≥ VCC for the LTC4313-2, connected to the SDA segment where stuck low recovery is desired; do not leave open.
8	VCC	power_in	Power supply input from 2.9V to 5.5V, bypass with at least 0.01µF to GND.

Key specifications

Parameter	Value
Manufacturer	Analog Devices
Package	MSOP-8
Category	Communication Interface Chip/UART/485/232
Pins	8

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Supply Voltage	VCC	-0.3		6	V		2
ENABLE Input Voltage		-0.3		6	V		2
SDAIN/SDAOUT/SCLIN/SCLOUT Voltage		-0.3		6	V		2
READY Output Voltage		-0.3		6	V		2
READY Output Sink Current				50	mA		2
Operating Ambient Temperature (LTC4313I)		-40		85	°C		2
Storage Temperature		-65		150	°C		2
Lead Temperature				300	°C	Soldering, 10 sec, MS package	2
Maximum Junction Temperature	TJMAX			150	°C	MS8 package	2
Thermal Resistance Junction to Ambient	θJA		163		°C/W	MS8 package	2
Input Supply Voltage	VCC	2.9		5.5	V		3
2-Wire Bus Supply Voltage	VDD,BUS	2.9		5.5	V	LTC4313-1, LTC4313-2	3
Input Supply Current	ICC	6	8.1	10	mA	VENABLE = VCC = 5.5V, VSDAIN,SCLIN = 0V (Note 3)	3
Input Supply Current (Disabled)	ICC(DISABLED)	2.5	3.5	4.5	mA	VENABLE = 0V, VCC = 5.5V, VSDAIN,SCLIN = 0V	3
VCC UVLO Threshold	VTH_UVLO	2.55	2.7	2.85	V	VCC Rising	3
UVLO Threshold Hysteresis Voltage	VCC_UVLO(HYST)		200		mV		3
Precharge Voltage	VPRE	0.8	1	1.2	V	SDA, SCL Pins Open	3
Buffer Offset Voltage	VOS(SAT)	100	190	280	mV	IOL = 4mA, Driven VSDA,SCL = 50mV	3
Buffer Offset Voltage	VOS(SAT)	15	60	120	mV	IOL = 500µA, Driven VSDA,SCL = 50mV	3
Buffer Offset Voltage	VOS	50	120	180	mV	IOL = 4mA, Driven VSDA,SCL = 200mV	3
Buffer Offset Voltage	VOS	15	60	115	mV	IOL = 500µA, Driven VSDA,SCL = 200mV	3
Buffer Input Logic Low Voltage	VIL, FALLING	0.3	0.33	0.36	V	VCC = 2.9V, 3.3V, 5.5V; values are multiples of VCC (0.3•VCC, 0.33•VCC, 0.36•VCC)	3
VIL Hysteresis Voltage	∆VIL(HYST)		50		mV		3
Input Leakage Current	ILEAK	-10		10	µA	SDA, SCL Pins = 5.5V, VCC = 5.5V, 0V	3
Input Capacitance	CIN			10	pF	SDA, SCL Pins (Note 4)	3
Minimum Slew Rate Requirement	dV/dt(RTA)	0.1	0.2	0.4	V/µs	SDA, SCL Pins, VCC = 5V	3
Rise Time Accelerator DC Threshold Voltage	VRTA(TH)	0.38	0.41	0.44	V	VCC = 5V; values are multiples of VCC	3
Rise Time Accelerator Pull-Up Current	IRTA	1.5	2.5	3.5	mA	LTC4313-2, SDA, SCL Pins, VCC = 5V (Note 5)	3
ENABLE Threshold Voltage	VEN(TH)	1	1.4	1.8	V		3
ENABLE Leakage Current	ILEAK	-10	0.1	10	µA	VENABLE = 5.5V	3
READY Output Low Voltage	VREADY(OL)			0.4	V	IREADY = 3mA, VCC = 5V	3
READY Off Leakage Current	IREADY(OH)	-5	0.1	5	µA	VCC = VREADY = 5V	3
Bus Stuck Low Timer	tTIMEOUT	35	45	55	ms		3
I2C Frequency Max	fSCL(MAX)	400			kHz		3
SCL, SDA Fall Delay	tPDHL		130	250	ns	VCC = VDD,BUS = 5V, CBUS = 100pF, RBUS = 10kΩ (Note 4)	3
SCL, SDA Fall Times	tf	20		300	ns	VCC = VDD,BUS = 5V, CBUS = 100pF, RBUS = 10kΩ (Note 4)	3
Bus Idle Time	tIDLE	55	95	175	µs		3

CAD (KiCad official)

Symbol: LTC4313IMS8-2#PBF
Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
3D model: MSOP-8 (KiCad packages3D, STEP)
3D model files: ltc4313ims8-2-pbf-etched.step / ltc4313ims8-2-pbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ltc4313ims8-2-pbf.step / ltc4313ims8-2-pbf.glb are the bare package body.

Provenance

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

Datasheet: Analog Devices datasheet (20 pp, sha256 0a65a78c3f78e5a1, retrieved 2026-10-31, tier: manufacturer)
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

LTC4313IMS8-2#PBF

Verified LTC4313IMS8-2#PBF

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3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

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