at24c16b ATMEL Corporation, at24c16b Datasheet - Page 3

• Manufacturer Part Number: at24c16b
• Description: Two-wire Serial Eeprom 16k 2048 X 8
• Manufacturer: ATMEL Corporation

3. Pin Description
4. Memory Organization
5175C–SEEPR–11/07
SERIAL CLOCK (SCL): The SCL input is used to positive edge clock data into each EEPROM
device and negative edge clock data out of each device.
SERIAL DATA (SDA): The SDA pin is bidirectional for serial data transfer. This pin is open-
drain driven and may be wire-ORed with any number of other open-drain or open-collector
devices.
DEVICE/PAGE ADDRESSES (A2, A1, A0): The AT24C16B does not use the device address
pins, which limits the number of devices on a single bus to one. The A0, A1, A2 are no connects
and can be connected to ground.
WRITE PROTECT (WP): The AT24C16B has a write protect pin that provides hardware data
protection. The write protect pin allows normal read/write operations when connected to ground
(GND). When the write protect pin is connected to V
and operates as shown in
Table 3-1.
AT24C16B, 16K SERIAL EEPROM: Internally organized with 128 pages of 16 bytes each, the
16K requires an 11-bit data word address for random word addressing.
WP Pin
Status
At V
At GND
CC
Write Protect
Full (16K) Array
Normal Read/Write Operations
Part of the Array Protected
24C16B
Table
3-1.
CC
, the write protection feature is enabled
3