AT34C04-X5M-T from Microchip Tech, in a TSSOP-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	A0	input	Device address input, one of the three LSBs of the I2C FM+ seven-bit slave address, connectable to VCC or GND; it is also overvoltage tolerant up to 10V to support Reversible Software Write Protection (RSWP).
2	A1	input	Device address input, one of the three LSBs of the I2C FM+ seven-bit slave address, which can be connected directly to VCC or GND in any combination to allow up to eight devices on the same bus.
3	A2	input	Device address input, one of the three LSBs of the I2C FM+ seven-bit slave address, which can be connected directly to VCC or GND in any combination to allow up to eight devices on the same bus.
4	GND	power_in	Ground reference for the power supply, which should be connected to the system ground.
5	SDA	bidirectional	Open-drain serial data pin that must be pulled high with an external pull-up resistor not exceeding 8K and may be wire-ORed with other open-drain or open-collector devices on the bus.
6	SCL	input	Serial clock input that latches SDA data on the rising edge and clocks SDA data out on the falling edge; it must be forced high when the bus is idle or pulled high with an external resistor.
7	NC	unconnected	No connect; the pin is not bonded to a die pad and can be connected to GND or left floating.
8	VCC	power_in	Device power supply pin rated for 1.7V to 3.6V per the features list; operation at invalid VCC voltages may produce spurious results and should not be attempted.

Key specifications

Parameter	Value
Manufacturer	Microchip Tech
Package	TSSOP-8
Category	Interface 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
Supply Voltage	VCC	1.7		3.6	V		10
Operating Temperature Range	TA	-20		125	°C		10
Temperature Under Bias		-40		125	°C		10
Supply Voltage with respect to ground		-0.5		4.3	V		10
Supply Current Read	ICC1		0.4	1	mA	VCC = 3.6V Read at 100kHz	10
Supply Current Write	ICC2		1.5	3	mA	VCC = 3.6V Write at 100kHz	10
Standby Current	ISB		1.6	3	μA	VCC = 1.7V VIN = VCC or VSS	10
Standby Current	ISB		1.6	4	μA	VCC = 3.6V VIN = VCC or VSS	10
Input Leakage Current	ILI		0.1	2	μA	VIN = VCC or VSS	10
Output Leakage Current	ILO		0.1	2	μA	VOUT = VCC or VSS	10
Input Low Level	VIL	-0.5			V		10
Low-Level Output Voltage (Open-Drain)	VOL1			0.4	V	VCC > 2V IOL = 3mA	10
Low-Level Output Current	IOL			3	mA	VOL = 0.4V Freq ≤ 400kHz	10
Low-Level Output Current	IOL			6	mA	VOL = 0.6V Freq ≤ 400kHz	10
Low-Level Output Current	IOL			20	mA	VOL = 0.4V Freq > 400kHz	10
A0 Pin High Voltage	VHV	7		10	V	VHV - VCC ≥ 4.8V	10
Input/output capacitance (SDA)	CI/O			8	pF	VI/O = 0V	12
Input capacitance (A0, A1, A2, SCL)	CIN			6	pF	VIN = 0V	12
Clock Frequency, SCL	fSCL	10		100	kHz	VCC < 2.2V, 100kHz	11
Clock Frequency, SCL	fSCL	10		400	kHz	VCC ≥ 2.2V, 400kHz	11
Clock Frequency, SCL	fSCL	10		1000	kHz	VCC ≥ 2.2V, 1000kHz	11
Clock Pulse Width Low	tLOW	4700			ns	VCC < 2.2V, 100kHz	11
Clock Pulse Width Low	tLOW	1300			ns	VCC ≥ 2.2V, 400kHz	11
Clock Pulse Width Low	tLOW	500			ns	VCC ≥ 2.2V, 1000kHz	11
Clock Pulse Width High	tHIGH	4000			ns	VCC < 2.2V, 100kHz	11
Clock Pulse Width High	tHIGH	600			ns	VCC ≥ 2.2V, 400kHz	11
Clock Pulse Width High	tHIGH	260			ns	VCC ≥ 2.2V, 1000kHz	11
Bus free time before new transmission	tBUF	4700			ns	VCC < 2.2V, 100kHz	11
Bus free time before new transmission	tBUF	1300			ns	VCC ≥ 2.2V, 400kHz	11
Bus free time before new transmission	tBUF	500			ns	VCC ≥ 2.2V, 1000kHz	11
Start Hold Time	tHD.STA	4000			ns	VCC < 2.2V, 100kHz	11
Start Hold Time	tHD.STA	600			ns	VCC ≥ 2.2V, 400kHz	11
Start Hold Time	tHD.STA	260			ns	VCC ≥ 2.2V, 1000kHz	11
Start Set-up Time	tSU.STA	4700			ns	VCC < 2.2V, 100kHz	11
Start Set-up Time	tSU.STA	600			ns	VCC ≥ 2.2V, 400kHz	11
Start Set-up Time	tSU.STA	260			ns	VCC ≥ 2.2V, 1000kHz	11
Data In Hold Time	tHD.DI	0			ns	VCC < 2.2V, 100kHz	11
Data In Set-up Time	tSU.DAT	250			ns	VCC < 2.2V, 100kHz	11
Data In Set-up Time	tSU.DAT	100			ns	VCC ≥ 2.2V, 400kHz	11
Data In Set-up Time	tSU.DAT	50			ns	VCC ≥ 2.2V, 1000kHz	11
Inputs Rise Time	tR			1000	ns	VCC < 2.2V, 100kHz	11
Inputs Rise Time	tR	20		300	ns	VCC ≥ 2.2V, 400kHz	11
Inputs Rise Time	tR	20		120	ns	VCC ≥ 2.2V, 1000kHz	11
Inputs Fall Time	tF			300	ns	VCC < 2.2V, 100kHz	11
Inputs Fall Time	tF	20		300	ns	VCC ≥ 2.2V, 400kHz	11
Inputs Fall Time	tF	20		120	ns	VCC ≥ 2.2V, 1000kHz	11
Stop Set-up Time	tSU.STO	4000			ns	VCC < 2.2V, 100kHz	11
Stop Set-up Time	tSU.STO	600			ns	VCC ≥ 2.2V, 400kHz	11
Stop Set-up Time	tSU.STO	260			ns	VCC ≥ 2.2V, 1000kHz	11
Data Out Hold Time	tHD.DAT	200		3450	ns	VCC < 2.2V, 100kHz	11
Data Out Hold Time	tHD.DAT	200		900	ns	VCC ≥ 2.2V, 400kHz	11
Data Out Hold Time	tHD.DAT	0		350	ns	VCC ≥ 2.2V, 1000kHz	11
Write Cycle Time	tWR			5	ms	VCC < 2.2V, 100kHz	11
Timeout Time	tOUT	25		35	ms	VCC < 2.2V, 100kHz	11

CAD (KiCad official)

Symbol: AT34C04-X5M-T
Footprint: Package_SO:TSSOP-8_4.4x3mm_P0.65mm
3D model: TSSOP-8 (KiCad packages3D, STEP)
3D model files: at34c04-x5m-t-etched.step / at34c04-x5m-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); at34c04-x5m-t.step / at34c04-x5m-t.glb are the bare package body.

Provenance

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

Datasheet: Microchip Tech datasheet (30 pp, sha256 507e04c664c484b3, retrieved 2026-11-05, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-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

AT34C04-X5M-T

Verified AT34C04-X5M-T

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README