Spark Logic

24C16 EEPROM (24LC16B) connection guide

24C16 EEPROM (24LC16B) TSSOP-8 wiring guide with power, signal assignments, and bench checks.

PDIP-8 8 contacts
SOIC-8 8 contacts
MSOP-8 8 contacts

TSSOP-8

8 contacts Current package
DFN-8 9 contacts
TDFN-8 9 contacts
SOT-23-5 5 contacts

Microchip Technology · Standard pin assignment · 0.65 mm lead pitch · Microchip package code /ST

Power and bypass

Required

Connect the EEPROM and a 3.3 V I²C host to a regulated 3.3 V rail with a shared ground. Fit a 100 nF ceramic capacitor directly across the EEPROM supply pins. Finish the signal connections before applying power.

C1 100 nF ceramic between 3.3 V and Ground3.3 VC1 100 nF ceramicGround

Bench checks

  • Measure about 3.3 V from VCC to VSS at the package.

Microchip DS20001703R · §1 and §2. Microchip AN1028 · Figure 1.

Connection scenarios

Read with hardware write protection

With power off, tie WP to 3.3 V to lock the array against writes. Use a known programmed part and read it through the same I²C bus.

Fit C1 as shown in Power and bypass. Connect both open-drain host lines and start at 100 kHz.

Use 7-bit address 0x50 + (offset >> 8), then send the low byte of the offset.

B2:B0 select one of eight 256-byte blocks. A single device occupies 0x50–0x57.

I²C wiring with separate pull-ups on SDA and SCL and WP tied high3.3 VR14.7 kΩR24.7 kΩSDASCLHostEEPROMVCCVSSWPCommon ground

Bench checks

  • For a short bus, use R1 and R2 of 4.7 kΩ each and count any host-board pull-ups in parallel. At 100 pF the estimated 30–70% rise time is 0.40 µs and LOW current is about 0.62 mA at 0.4 V. Measure SDA and SCL rise time against the 1 µs Standard-mode limit before changing speed or adding wiring.
  • Read a selected byte by sending the client address with write direction, then the memory address, then a repeated START and the client address with read direction. End a one-byte read with NACK and STOP.
  • Confirm WP is high before testing. On a scratch byte, read the original value, attempt a write, then verify the original value remains. An I²C acknowledgement alone does not verify programming.

Microchip DS20001703R · §§5–8. Microchip AN1028 · Figure 1 and pull-up calculation.

TSSOP-8 wiring map

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

Top view · Locate pin 1 using the package index mark.
Selected pin details

1 · A0

Unconnected · NC / reserved

No internal connection. Leave open. The address selection is handled in the I²C control byte.

DS20001703R · §2 and Table 2-1

Electrical limits · Pin in the reference

Models and documents

This reference covers the standard package codes listed for Microchip 24LC16B in the linked datasheet. Match the full manufacturer part number before wiring a device marked 24C16. Use its own datasheet for other manufacturers or the Microchip AA and FC versions.

24LC16B
The /ST package suffix selects this outline. Check the ordering table for supported temperature and reel combinations.