Spark Logic

AT24C08C serial EEPROM connection guide

AT24C08C serial EEPROM SOT-23-5 wiring guide with power, signal assignments, and bench checks.

SOIC-8 8 contacts
PDIP-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 Current package

Microchip Technology ·

Read and write over I²C

Required

Use a 3.3 V rail with 100 nF local bypassing. The device has no external A2 strap. Tie WP low with power off to enable writes.

R1 4.7 kΩ between +3.3 V and I²C data+3.3 VR1 4.7 kΩI²C data
R2 4.7 kΩ between +3.3 V and I²C clock+3.3 VR2 4.7 kΩI²C clock
C1 100 nF between +3.3 V and Ground+3.3 VC1 100 nFGround

Bench checks

  • Begin at 100 kHz. At address 0x50, issue a write address phase and a one-byte memory offset. Use a repeated START and read back one byte.
  • Write one byte to a scratch address. Send STOP, poll for acknowledgement for up to 5 ms, then read it back. Split multi-byte writes at 16-byte page boundaries.

Microchip DS20006127A, §§ 1–2, 6–8, 12 and Product Identification System.

Connection scenarios

Read with write protection

Use a 3.3 V rail with 100 nF local bypassing. The device has no external A2 strap. Tie WP high with power off to protect the entire array.

R1 4.7 kΩ between +3.3 V and I²C data+3.3 VR1 4.7 kΩI²C data
R2 4.7 kΩ between +3.3 V and I²C clock+3.3 VR2 4.7 kΩI²C clock
C1 100 nF between +3.3 V and Ground+3.3 VC1 100 nFGround

Bench checks

  • Begin at 100 kHz. At address 0x50, issue a write address phase and a one-byte memory offset. Use a repeated START and read back one byte.
  • On a scratch address, attempt to write a different byte and verify that the original byte is retained.

Microchip DS20006127A, §§ 1–2, 6–8, 12 and Product Identification System.

SOT-23-5 wiring map

Highlighted contacts are used in the required step or selected circuit. Select a contact to inspect it.

SOT-23-5
Top view. Start at the package pin-1 index and follow the numbered leads. Scroll the map to reach all contacts.
Selected pin details

5 · WP

Input · Control

Tie high to protect the entire array from writes, or low to enable writes.

Microchip DS20006127A, §§ 1–2, 6–8, 12 and Product Identification System.

Electrical limits · Pin in the reference

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-STUM-T
Tape and reel.