AT25020B-SSHL-B from Microchip Tech, 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	CS	input	Chip Select: the device is selected when CS is low, and when deselected SI data is not accepted and SO stays high-impedance; CS should follow VCC at power-up via a pull-up of 10 kΩ or less.
2	SO	tri_state	Serial Data Output: transfers data out of the device, shifted out after the falling edge of SCK, and is high-impedance when the device is not selected or during HOLD.
3	WP	input	Write-Protect: normal read/write operations are allowed when held high, all write operations are inhibited when brought low, and it should be driven high or low as appropriate.
4	GND	power_in	Ground reference for the device power supply VCC, to be connected to system ground.
5	SI	input	Serial Data Input: receives instructions, addresses and data, latched on the rising edge of SCK.
6	SCK	input	Serial Data Clock: synchronizes communication with the master, with SI latched on the rising edge and SO clocked out on the falling edge of SCK.
7	HOLD	input	Suspend Serial Input: when brought low while SCK is low it pauses serial communication without resetting the sequence, SI is ignored and SO is high-impedance; it should be driven high or low as appropriate.
8	VCC	power_in	Device power supply pin; operation at invalid VCC voltages may produce spurious results, and all packages operate from 1.7V to 5.5V.

Key specifications

Parameter	Value
Manufacturer	Microchip Tech
Package	SOIC-8
Category	Memory
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
Operating temperature (absolute max section)		-40		125	°C		9
Storage temperature		-65		150	°C		9
Voltage on any pin with respect to ground		-1		7	V		9
Supply voltage (absolute max)	VCC			6.25	V		9
DC output current				5	mA		9
Operating temperature (case), Grade 1		-40		125	°C	Automotive Grade 1	9
Operating temperature (case), Grade 3		-40		85	°C	Automotive Grade 3	9
Supply Voltage	VCC1	2.5		5.5	V	Grade 1	9
Supply Voltage	VCC2	1.7		5.5	V	Grade 3	9
Supply Current	ICC1			6	mA	VCC = 5.0V at 5 MHz, SO = Open, Read	9
Supply Current	ICC2			3	mA	VCC = 5.0V at 1 MHz	9
Standby Current	ISB1		0.1	2	µA	VCC = 1.7V, CS = VCC	9
Standby Current	ISB2		0.2	3	µA	VCC = 2.5V, CS = VCC	9
Standby Current	ISB3		2	5	µA	VCC = 5.0V, CS = VCC	9
Input Leakage	IIL	-3		3	µA	VIN = 0V to VCC	9
Output Leakage	IOL	-3		3	µA	VIN = 0V to VCC	9
Input Low-Voltage	VIL	-0.6		0.3	V	max printed as VCC x 0.3; reference only, not tested	9
Input High-Voltage	VIH	0.7		0.5	V	min printed as VCC x 0.7, max as VCC + 0.5; reference only, not tested	10
Output Low-Voltage	VOL1			0.4	V	2.5V ≤ VCC ≤ 5.5V IOL = 3.0 mA	10
Output High-Voltage	VOH1	-0.8			V	2.5V ≤ VCC ≤ 5.5V IOH = -1.6 mA; min printed as VCC - 0.8	10
Output Low-Voltage	VOL2			0.2	V	1.7V ≤ VCC ≤ 5.5V IOL = 0.15 mA	10
Output High-Voltage	VOH2	-0.2			V	1.7V ≤ VCC ≤5.5V IOH = -100 µA; min printed as VCC - 0.2	10
SCK Clock Frequency	fSCK	0		5	MHz	CL = 1 TTL Gate and 100 pF	10
Input Rise Time	tRI			2000	ns		10
Input Fall Time	tFI			2000	ns		10
SCK High Time	tWH	40			ns		10
SCK Low Time	tWL	40			ns		10
CS High Time	tCS	80			ns		10
CS Setup Time	tCSS	80			ns		10
CS Hold Time	tCSH	80			ns		10
Data In Setup Time	tSU	5			ns		10
Data In Hold Time	tH	20			ns		10
HOLD Setup Time	tHD	40			ns		10
HOLD Hold Time	tCD	40			ns		10
Output Valid	tV	0		40	ns		10
Output Hold Time	tHO	0			ns		10
HOLD to Output Low-Z	tLZ	0		40	ns		10
HOLD to Output High-Z	tHZ			80	ns		10
Output Disable Time	tDIS			80	ns		10
Write Cycle Time	tWC			5	ms		10
Time required after VCC is stable before the device can accept instructions	tPUP	100			µs		11
Power-on Reset Threshold Voltage	VPOR			1.5	V		11
Minimum time at VCC = 0V between power cycles	tPOFF	500			ms		11
Output Capacitance (SO)	COUT			8	pF	VOUT = 0V	12
Input Capacitance (CS, SCK, SI, WP, HOLD)	CIN			6	pF	VIN = 0V	12
Write Endurance		1e+06			Write Cycles	TA = 25°C, VCC = 5.0V, Page Write mode	12
Data Retention		100			Years	TA = 55°C	12

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
contacts		tin	8-Lead Plastic Small Outline (SN) - Narrow, 3.90 mm (.150 In.) Body [SOIC] © 2020 Microchip Technology Inc.	24

CAD (KiCad official)

Symbol: AT25020B-SSHL-B
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)
3D model files: at25020b-sshl-b-etched.step / at25020b-sshl-b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); at25020b-sshl-b.step / at25020b-sshl-b.glb are the bare package body.

Provenance

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

Datasheet: Microchip Tech datasheet (37 pp, sha256 26f8c10b160092f9, retrieved 2026-10-30, 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).

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AT25020B-SSHL-B

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