I²C
The two high memory address bits are included in the device address. One word-address byte selects the offset within a block. With A2 low, the four blocks use 0x50–0x53.
AT24C08C serial EEPROM pinout
The AT24C08C stores 1024 bytes in four address blocks and supports a full-array hardware write protect input.
SOIC-8
8 contacts Current packagePDIP-8 8 contacts
TSSOP-8 8 contacts
UDFN-8 · 2 × 3 mm 9 contacts
VFBGA-8 · 1.5 × 2.0 mm 8 contacts
SOT-23-5 5 contacts
SOIC-8 pinout
5 · SDA
Open-drain I²C data. The bus needs a pull-up to its logic rail.
All 8 pins
| Pin | Signal | Direction | Function |
|---|---|---|---|
| 1 | NC None | None | No internal connection. Leave electrically open unless the package notes specify otherwise. |
| 2 | NC None | None | No internal connection. Leave electrically open unless the package notes specify otherwise. |
| 3 | A2 Input | Input | Hardware address bit. Tie to a known logic level. SOT-23 omits this contact and treats it as low. |
| 4 | GND Supply return | Supply return | Connect to the common ground plane or bench return. |
| 5 | SDA Bidirectional | Bidirectional | Open-drain I²C data. The bus needs a pull-up to its logic rail. |
| 6 | SCL Input | Input | I²C clock. Connect to the host clock line with its bus pull-up. |
| 7 | WP Input | Input | Tie high to protect the entire array from writes, or low to enable writes. |
| 8 | VCC Supply input | Supply input | Primary device supply. Place the bypass capacitor close to this pin. |
Signal assignments
Write protection
A logic high blocks writes across all four blocks while allowing reads.
Electrical limits
| Parameter | Limit | Conditions and source |
|---|---|---|
| Supply1.7–5.5 V | 1.7–5.5 V | See the datasheet timing table for the supported bus clock at the selected supply. Microchip DS20006127A, §§ 1–2, 6–8, 12 and Product Identification System. |
| Memory1024 bytes | 1024 bytes | Four blocks of 256 bytes. Use the block bits in the device address. Microchip DS20006127A, §§ 1–2, 6–8, 12 and Product Identification System. |
| Page write16 bytes · 5 ms maximum | 16 bytes · 5 ms maximum | Crossing the end of a page within one write wraps back inside that same page. Microchip DS20006127A, §§ 1–2, 6–8, 12 and Product Identification System. |
Models and documents
The six maps follow the package configurations in the Microchip datasheet. Package rows include documented order-code examples. Pin 2 is NC on the 8 Kbit AT24C08C.
- AT24C08C-SSHM-B
- Bulk package.
- AT24C08C-SSHM-T
- Tape and reel.
- AT24C08C manufacturer documentation· Microchip DS20006127A, §§ 1–2, 6–8, 12 and Product Identification System.