MC100EL31DG from onsemi, in a SOIC-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	S	input	ECL asynchronous set input, level triggered, with internal pulldown resistor so it defaults low when left open.
2	D	input	ECL data input with internal pulldown resistor; data enters the master when CLK is LOW.
3	CLK	input	ECL clock input with internal pulldown resistor; data is transferred to the outputs on the LOW-to-HIGH transition.
4	R	input	ECL asynchronous reset input, level triggered, with internal pulldown resistor so it defaults low when left open.
5	VEE	power_in	Negative supply, 0 V in PECL mode or -4.2 V to -5.7 V in NECL mode (absolute maximum -8 V).
6	Q̄	output	Complementary ECL data output.
7	Q	output	True ECL data output.
8	VCC	power_in	Positive supply, 4.2 V to 5.7 V in PECL mode or 0 V in NECL mode (absolute maximum 8 V).

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	SOIC-8
Category	Logic ICs
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
PECL Mode Power Supply	VCC			8	V	VEE = 0 V	2
NECL Mode Power Supply	VEE	-8			V	VCC = 0 V	2
PECL Mode Input Voltage	VI			6	V	VEE = 0 V; VI ≤ VCC	2
NECL Mode Input Voltage	VI	-6			V	VCC = 0 V; VI ≥ VEE	2
Output Current, Continuous	Iout			50	mA	Continuous	2
Output Current, Surge	Iout			100	mA	Surge	2
Operating Temperature Range	TA	-40		85	°C		2
Storage Temperature Range	Tstg	-65		150	°C		2
Thermal Resistance, Junction-to-Ambient	θJA			190	°C/W	0 lfpm; SOIC−8 NB	2
Thermal Resistance, Junction-to-Ambient	θJA			130	°C/W	500 lfpm; SOIC−8 NB	2
Thermal Resistance, Junction-to-Case	θJC	41		44	°C/W	Standard board; SOIC−8 NB	2
Wave Solder (Pb-Free)	Tsol			265	°C	< 2 to 3 sec @ 260°C	2
PECL Mode Operating Range	VCC	4.2		5.7	V	VEE = 0 V	1
NECL Mode Operating Range	VEE	-5.7		-4.2	V	VCC = 0 V	1
PECL Power Supply Current, 100EL	IEE	27		32	mA	VCC = 5.0 V; VEE = 0 V; −40°C	3
PECL Power Supply Current, 100EL	IEE	31		37	mA	VCC = 5.0 V; VEE = 0 V; 85°C	3
PECL Output HIGH Voltage	VOH	3915	3995	4120	mV	VCC = 5.0 V; VEE = 0 V; −40°C; 50 Ω to VCC−2 V	3
PECL Output HIGH Voltage	VOH	3975	4045	4120	mV	VCC = 5.0 V; VEE = 0 V; 25°C; 50 Ω to VCC−2 V	3
PECL Output HIGH Voltage	VOH	3975	4050	4120	mV	VCC = 5.0 V; VEE = 0 V; 85°C; 50 Ω to VCC−2 V	3
PECL Output LOW Voltage	VOL	3170	3305	3445	mV	VCC = 5.0 V; VEE = 0 V; −40°C; 50 Ω to VCC−2 V	3
PECL Output LOW Voltage	VOL	3190	3295	3380	mV	VCC = 5.0 V; VEE = 0 V; 25°C; 50 Ω to VCC−2 V	3
PECL Input HIGH Voltage	VIH	3835		4120	mV	VCC = 5.0 V; VEE = 0 V; −40°C	3
PECL Input LOW Voltage	VIL	3190		3525	mV	VCC = 5.0 V; VEE = 0 V; −40°C	3
PECL Input HIGH Current	IIH			150	µA	VCC = 5.0 V; VEE = 0 V; 25°C	3
PECL Input LOW Current	IIL			0.5	µA	VCC = 5.0 V; VEE = 0 V; 25°C	3
NECL Power Supply Current, 100EL	IEE	27		32	mA	VCC = 0 V; VEE = −5.0 V; −40°C	4
NECL Power Supply Current, 100EL	IEE	31		37	mA	VCC = 0 V; VEE = −5.0 V; 85°C	4
NECL Output HIGH Voltage	VOH	-1085	-1005	-880	mV	VCC = 0 V; VEE = −5.0 V; −40°C; 50 Ω to VCC−2 V	4
NECL Output HIGH Voltage	VOH	-1025	-955	-880	mV	VCC = 0 V; VEE = −5.0 V; 25°C; 50 Ω to VCC−2 V	4
NECL Output LOW Voltage	VOL	-1830	-1695	-1555	mV	VCC = 0 V; VEE = −5.0 V; −40°C; 50 Ω to VCC−2 V	4
NECL Output LOW Voltage	VOL	-1810	-1705	-1620	mV	VCC = 0 V; VEE = −5.0 V; 25°C; 50 Ω to VCC−2 V	4
NECL Input HIGH Voltage	VIH	-1165		-880	mV	VCC = 0 V; VEE = −5.0 V; −40°C	4
NECL Input LOW Voltage	VIL	-1810		-1475	mV	VCC = 0 V; VEE = −5.0 V; −40°C	4
NECL Input HIGH Current	IIH			150	µA	VCC = 0 V; VEE = −5.0 V; 25°C	4
NECL Input LOW Current	IIL			0.5	µA	VCC = 0 V; VEE = −5.0 V; 25°C	4
Maximum Toggle Frequency	fmax	2.2		2.8	GHz	25°C	4
Propagation Delay to Output, Low-to-High	tPLH	315	465	630	ps	From CLK, S, R; −40°C	4
Propagation Delay to Output, Low-to-High	tPLH	375	475	590	ps	From CLK, S, R; 25°C	4
Propagation Delay to Output, Low-to-High	tPLH	430	530	645	ps	From CLK, S, R; 85°C	4
Propagation Delay to Output, High-to-Low	tPHL	295	455	630	ps	From CLK, S, R; −40°C	4
Propagation Delay to Output, High-to-Low	tPHL	355	465	590	ps	From CLK, S, R; 25°C	4
Propagation Delay to Output, High-to-Low	tPHL	400	510	645	ps	From CLK, S, R; 85°C	4
Setup Time	tS	150		250	ps	25°C	4
Hold Time	tH	0		100	ps	25°C	4
Minimum Pulse Width (CLK, Set, Reset)	tPW	400			ps	25°C	4
Output Rise/Fall Time Q (20%−80%)	tr/tf	100	225	350	ps	20%−80%; 25°C	4

CAD (KiCad official)

Symbol: MC100EL31DG
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)
3D model files: mc100el31dg-etched.step / mc100el31dg-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mc100el31dg.step / mc100el31dg.glb are the bare package body.

Provenance

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

Datasheet: onsemi datasheet (8 pp, sha256 ffdf3c513c514bba, retrieved 2026-10-30, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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

MC100EL31DG

Verified MC100EL31DG

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

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