AT24C16D from IDCHIP, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	NC	unconnected	No connect. Not internally bonded; leave floating or tie as convenient. On the AT24C16D the three lower address pins A0/A1/A2 are unused because the device's 11-bit word address consumes the p0/p1/p2 bits that would otherwise be device-select bits.
2	NC	unconnected	No connect. Not internally bonded; leave floating or tie as convenient.
3	NC	unconnected	No connect. Not internally bonded; leave floating or tie as convenient.
4	GND	power_in	Ground / power negative return. Common reference for VCC and the I2C bus.
5	SDA	bidirectional	I2C serial data line. Open-drain bidirectional data pin; requires an external pull-up to VCC (typ. 10 kΩ). Carries address and data during read/write transactions, and drives ACK/NACK on the 9th clock.
6	SCL	input	I2C serial clock input driven by the bus master. Data on SDA is sampled on the rising edge and shifted on the falling edge. Maximum frequency 400 kHz at 1.8-2.7 V, 1 MHz at 5 V. Requires an external pull-up (typ. 10 kΩ).
7	WP	input	Hardware write-protect input. When tied to VCC, write operations to the entire array are inhibited; when tied to GND (or left low), normal write operations are permitted. Read operations are unaffected.
8	VCC	power_in	Positive supply voltage, 1.8 V to 5.5 V (absolute max 5.5 V). Recommended decoupling with a 1 µF capacitor to GND close to the pin. Standby current <1 µA, active read ~0.5 mA, active write ~2 mA.

Key specifications

Parameter	Value
Manufacturer	IDCHIP
Package	SOP-8
Category	Memory
Pins	8

Ordering variants

AT24C16D

CAD (KiCad official)

Symbol: AT24C16D
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`at24c16d.step`	122 KB	You want the bare part, or you mark your own boards.
`at24c16d-etched.step`	1.6 MB	You want the part with `AT24C16D` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 403 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: IDCHIP datasheet (12 pp, sha256 e9ef301f0a8c7673, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF