Spark Logic

24C16 EEPROM (24LC16B) pinout

The 24LC16B is a 16-Kbit I²C EEPROM that stores 2 KiB and writes up to 16 bytes per page.

PDIP-8 8 contacts

SOIC-8

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

Microchip Technology · Narrow body · 1.27 mm lead pitch · Microchip package code /SN

SOIC-8 pinout

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

4 · VSS

Reference · Ground

Supply return and signal reference. Connect to the host ground.

DS20001703R · §2 and Table 2-1

Electrical limits · Link to this pin

All 8 pins

PinSignalDirectionFunction
1A0 UnconnectedUnconnected No internal connection. Leave open. The address selection is handled in the I²C control byte.
2A1 UnconnectedUnconnected No internal connection. Leave open. The address selection is handled in the I²C control byte.
3A2 UnconnectedUnconnected No internal connection. Leave open. The address selection is handled in the I²C control byte.
4VSS ReferenceReference Supply return and signal reference. Connect to the host ground.
5SDA Open-drain I/OOpen-drain I/O Serial address and data. Pull up to the bus rail and let the host and EEPROM drive only LOW.
6SCL InputInput Serial clock from the host. On an open-drain bus, provide a pull-up to the bus rail.
7WP InputInput Tie to VCC to protect the entire array or to VSS to enable writes. Reads are available in both states.
8VCC SupplySupply Regulated 2.5–5.5 V supply. Bypass locally to VSS.

Signal assignments

I²C bus

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.

Write protection

Tie to VCC to protect the entire array or to VSS to enable writes. Reads are available in both states.

Electrical limits

ParameterLimitConditions and source
Operating supply2.5–5.5 V2.5–5.5 V Industrial (I) and extended (E) temperature ranges are listed in the device selection table. Check the exact order code. DS20001703R · p. 1
I²C clock limit400 kHz400 kHz Meet the AC timing, voltage and pull-up requirements. The wiring example uses 100 kHz. DS20001703R · §1, Table 1-2
Input thresholdsLOW ≤ 0.3 × VCC · HIGH ≥ 0.7 × VCCLOW ≤ 0.3 × VCC · HIGH ≥ 0.7 × VCC Relative to VSS over the specified supply range. Use a common-voltage bus or level shifting. DS20001703R · §1, Table 1-1
SDA output LOW≤ 0.40 V≤ 0.40 V Tested at 3.0 mA sink current and VCC = 2.5 V. DS20001703R · §1, Table 1-1
Memory and word address2 KiB · 1 address byte2 KiB · 1 address byte Offsets 0x0000–0x07FF. Client and memory addressing are described in the I²C signal assignment. DS20001703R · p. 1 and §5
Page write16 bytes · 5 ms maximum write cycle16 bytes · 5 ms maximum write cycle Split writes at page boundaries and use acknowledge polling after STOP. Read explicitly addressed data after power-up. DS20001703R · Table 1-2 and §§6–8

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 /SN package suffix selects this outline. Check the ordering table for supported temperature and reel combinations.