EEPROM. AT24C16B Datasheet

AT24C16B Datasheet PDF

Part AT24C16B
Description Two-wire Serial EEPROM
Feature AT24C16B; 1. Features • Low-voltage and Standard-voltage Operation – 1.8 (VCC = 1.8V to 5.5V) • Internally Org.
Manufacture ATMEL Corporation
Datasheet
Download AT24C16B Datasheet




AT24C16B
1. Features
Low-voltage and Standard-voltage Operation
– 1.8 (VCC = 1.8V to 5.5V)
Internally Organized 2048 x 8 (16K)
Two-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
1 MHz (5V, 2.5V), 400 kHz (1.8V) Compatibility
Write Protect Pin for Hardware Data Protection
16-byte Page (16K) Write Modes
Partial Page Writes Allowed
Self-timed Write Cycle (5 ms max)
High-reliability
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
8-lead PDIP, 8-lead JEDEC SOIC, 8-lead Ultra-Thin Mini-MAP (MLP 2x3), 5-lead SOT23,
8-lead Ultra Lead Frame Land Grid Array (ULA), 8-lead TSSOP and 8-ball dBGA2
Packages
Lead-free/Halogen-free
Die Sales: Wafer Form, Tape and Reel, and Bumped Wafers
Two-wire
Serial EEPROM
16K (2048 x 8)
AT24C16B
2. Description
The AT24C16B provides 16384 bits of serial electrically erasable and programmable
read-only memory (EEPROM) organized as 2048 words of 8 bits each. The device is
optimized for use in many industrial and commercial applications where low-power
and low-voltage operation are essential. The AT24C16B is available in space-saving
8-lead PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Thin Mini-MAP (MLP 2x3), 5-lead
SOT23, 8-lead Ultra Lead Frame Land Grid Array (ULA), 8-lead TSSOP, and 8-ball
dBGA2 packages and is accessed via a Two-wire serial interface. In addition, the
AT24C16B is available in 1.8V (1.8V to 5.5V) version.
Table 2-1.
Pin Name
NC
SDA
SCL
WP
Pin Configuration
Function
8-lead Ultra Thin
Mini-MAP (MLP 2x3)
No Connect
VCC 8
1 NC
Serial Data
Serial Clock Input
WP 7
SCL 6
SDA 5
2 NC
3 NC
4 GND
Write Protect
Bottom View
8-ball dBGA2
VCC 8 1 NC
WP 7 2 NC
SCL 6 3 NC
SDA 5 4 GND
Bottom View
GND
VCC
Ground
Power Supply
8-lead Ultra Lead Frame
Land Grid Array (ULA)
8-lead TSSOP
NC 1
8 VCC
NC 2
7 WP
NC 3
6 SCL
GND 4
5 SDA
8-lead SOIC
NC 1
8 VCC
NC 2
7 WP
NC
GND
3
4
6 SCL
5 SDA
VCC 8 1 NC
WP 7 2 NC
SCL 6 3 NC
SDA 5 4 GND
Bottom View
5-lead SOT23
SCL 1
5 WP
GND 2
SDA 3
4 VCC
8-lead PDIP
NC
NC
NC
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
Not Recommeded
for New Design.
Replaced by
AT24C16C.
5175E–SEEPR–3/09



AT24C16B
Absolute Maximum Ratings
Operating Temperature ................................ –55C to +125C
Storage Temperature.................................... –65C to +150C
Voltage on Any Pin
with Respect to Ground ....................................–1.0V to +7.0V
Maximum Operating Voltage .......................................... 6.25V
DC Output Current........................................................ 5.0 mA
*NOTICE:
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect device
reliability.
Figure 2-1.
Block Diagram
VCC
GND
WP
SCL
SDA
START
STOP
LOGIC
LOAD
DEVICE
ADDRESS
COMPARATOR
SERIAL
CONTROL
EN
H.V. PUMP/TIMING
LOGIC
COMP
LOAD INC
DATA RECOVERY
R/W DATA WORD
ADDR/COUNTER
EEPROM
DIN
DOUT
Y DEC
SERIAL MUX
DOUT/ACK
LOGIC
2 AT24C16B
5175E–SEEPR–3/09



AT24C16B
AT24C16B
3. Pin Description
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: The AT24C16B does not use the device address pins, which lim-
its the number of devices on a single bus to one.
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 VCC, the write protection feature is enabled
and operates as shown in Table 3-1.
Table 3-1.
WP Pin
Status
At VCC
At GND
Write Protect
Part of the Array Protected
24C16B
Full (16K) Array
Normal Read/Write Operations
4. Memory Organization
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.
5175E–SEEPR–3/09
3







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