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Features

• Write Protect Pin for Hardware Data Protection

– Utilizes Different Array Protection Compared to the AT24C02/04/08/16

• Low-voltage and Standard-voltage Operation

– 2.7 (V

= 2.7V to 5.5V)

– 1.8 (V

= 1.8V to 5.5V)

• Internally Organized 256 x 8 (2K), 512 x 8 (4K), 1024 x 8 (8K) or 2048 x 8 (16K)

• 2-wire Serial Interface

• Schmitt Trigger, Filtered Inputs for Noise Suppression

• Bi-directional Data Transfer Protocol

• 100 kHz (1.8V, 2.5V, 2.7V) and 400 kHz (5V) Clock Rate for AT24C02A, 04A and 08A

• 100 kHz (1.8V) and 400 kHz (2.5V, 2.7V and 5V) Clock Rate for AT24C16A

• 8-byte Page (2K), 16-byte Page (4K, 8K, 16K) Write Modes

• Partial Page Writes are Allowed

• Self-timed Write Cycle (10 ms max)

• High Reliability

– Endurance: One Million Write Cycles

– Data Retention: 100 Years

• Automotive Grade and Extended Temperature Devices Available

• 8-lead JEDEC SOIC, 8-pin PDIP, and 8-lead TSSOP Packages

Description

The AT24C02A/04A/08A/16A provides 2048/4096/8192/16384 bits of serial electri-

cally erasable and programmable read only memory (EEPROM) organized as

256/512/1024/2048 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 AT24C02A/04A/08A/16A is available in space saving 8-pin PDIP, 8-lead

JEDEC SOIC, and 8-lead TSSOP (AT24C02A/04A) packages and is accessed via a

2-wire serial interface. In addition, the entire family is available in 2.7V (2.7V to 5.5V)

and 1.8V (1.8V to 5.5V) versions.

2-wire Serial

EEPROM

2K (256 x 8)

4K (512 x 8)

8K (1024 x 8)

16K (2048 x 8)

AT24C02A

AT24C04A

AT24C08A

AT24C16A

Rev. 0976D–12/01

Pin Configurations

Pin Name Function

A0 - A2 Address Inputs

SDA Serial Data

SCL Serial Clock Input

WP Write Protect

NC No-connect

8-pin PDIP

GND

VCC

SCL

SDA

8-lead SOIC

GND

VCC

SCL

SDA

8-lead TSSOP

GND

VCC

SCL

SDA

Summary of content (20 pages)

PAGE 1
Features • Write Protect Pin for Hardware Data Protection – Utilizes Different Array Protection Compared to the AT24C02/04/08/16 • Low-voltage and Standard-voltage Operation • • • • • • • • • • • • – 2.7 (VCC = 2.7V to 5.5V) – 1.8 (VCC = 1.8V to 5.5V) Internally Organized 256 x 8 (2K), 512 x 8 (4K), 1024 x 8 (8K) or 2048 x 8 (16K) 2-wire Serial Interface Schmitt Trigger, Filtered Inputs for Noise Suppression Bi-directional Data Transfer Protocol 100 kHz (1.8V, 2.5V, 2.
PAGE 2
Absolute Maximum Ratings* Operating Temperature.................................. -55°C to +125°C Storage Temperature ..................................... -65°C to +150°C Voltage on Any Pin with Respect to Ground .....................................-1.0V to +7.0V Maximum Operating Voltage .......................................... 6.25V *NOTICE: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
PAGE 3
AT24C02A/04A/08A/16A The AT24C08A only uses the A2 input for hardwire addressing and a total of two 8K devices may be addressed on a single bus system. The A0 and A1 pins are noconnects. The AT24C16A does not use the device address pins, which limits the number of devices on a single bus to one. The A0, A1 and A2 pins are no-connects. WRITE PROTECT (WP): The AT24C02A/04A/08A/16A have a Write Protect pin that provides hardware data protection.
PAGE 4
DC Characteristics Applicable over recommended operating range from: TAI = -40°C to +85°C, VCC = +1.8V to +5.5V, TAC = 0°C to +70°C, VCC = +1.8V to +5.5V (unless otherwise noted). Symbol Parameter VCC1 Supply Voltage VCC2 Max Units 1.8 5.5 V Supply Voltage 2.5 5.5 V VCC3 Supply Voltage 2.7 5.5 V VCC4 Supply Voltage 4.5 5.5 V ICC Supply Current VCC = 5.0V READ at 100 kHz 0.4 1.0 mA ICC Supply Current VCC = 5.0V WRITE at 100 kHz 2.0 3.0 mA ISB1 Standby Current VCC = 1.
PAGE 5
AT24C02A/04A/08A/16A AC Characteristics Applicable over recommended operating range from TA = -40°C to +85°C, VCC = +1.8V to +5.5V, CL = 1 TTL Gate and 100 pF (unless otherwise noted). AT24C02A/ 04A/08A/16A 1.8V Symbol Parameter fSCL Clock Frequency, SCL tLOW Clock Pulse Width Low tHIGH Clock Pulse Width High Min Max AT2402A/04A/ 08A 2.5V, 2.7V Min 100 Max AT24C16A 2.5V Min 100 Max AT24C02A/ 04A/08A/16A 5.0V Min 400 Max Units 400 kHz 4.7 4.7 1.3 1.2 µs 4.0 4.0 0.6 0.
PAGE 6
Device Operation CLOCK and DATA TRANSITIONS: The SDA pin is normally pulled high with an external device. Data on the SDA pin may change only during SCL low time periods (refer to Data Validity timing diagram). Data changes during SCL high periods will indicate a start or stop condition as defined below. START CONDITION: A high-to-low transition of SDA with SCL high is a start condition which must precede any other command (refer to Start and Stop Definition timing diagram).
PAGE 7
AT24C02A/04A/08A/16A Bus Timing (SCL: Serial Clock, SDA: Serial Data I/O) Write Cycle Timing (SCL: Serial Clock, SDA: Serial Data I/O) SCL SDA 8th BIT ACK WORD n tWR(1) STOP CONDITION Note: START CONDITION 1. The write cycle time tWR is the time from a valid stop condition of a write sequence to the end of the interval clear/write cycle.
PAGE 8
Data Validity Start and Stop Definition Output Acknowledge 8 AT24C02A/04A/08A/16A 0976D–12/01
PAGE 9
AT24C02A/04A/08A/16A Device Addressing The 2K, 4K and 8K EEPROM devices all require an 8 bit device address word following a start condition to enable the chip for a read or write operation (refer to Figure 1). The device address word consists of a mandatory one, zero sequence for the first four most significant bits as shown. This is common to all the EEPROM devices. The next 3 bits are the A2, A1 and A0 device address bits for the 2K EEPROM.
PAGE 10
Read Operations Read operations are initiated the same way as write operations with the exception that the read/write select bit in the device address word is set to one. There are three read operations: current address read, random address read and sequential read. CURRENT ADDRESS READ: The internal data word address counter maintains the last address accessed during the last read or write operation, incremented by one. This address stays valid between operations as long as the chip power is maintained.
PAGE 11
AT24C02A/04A/08A/16A Figure 2. Byte Write S T A R T DEVICE ADDRESS W R I T E WORD ADDRESS S T O P DATA SDA LINE M S B L R A S / C BW K M S B L S B A C K A C K Figure 3. Page Write S T A R T DEVICE ADDRESS W R I T E WORD ADDRESS (n) DATA (n) DATA (n + 1) S T O P DATA (n + x) SDA LINE M S B L R A S / C BW K A C K A C K A C K A C K Figure 4.
PAGE 12
Figure 5. Random Read S T A R T DEVICE ADDRESS W R I T E S T A R T WORD ADDRESS n R E A D DEVICE ADDRESS S T O P SDA LINE M S B L R A S / C BW K M S B L A S C B K M S B L S B A C K DATA n N O A C K DUMMY WRITE Figure 6.
PAGE 13
AT24C02A/04A/08A/16A AT24C02A Ordering Information tWR (max) (ms) ICC (max) (µA) ISB (max) (µA) fMAX (kHz) 10 1500 4 10 800 3 Ordering Code Package Operation Range 100 AT24C02A-10PI-2.7 AT24C02AN-10SI-2.7 AT24C02A-10TI-2.7 8P3 8S1 8T Industrial (-40°C to 85°C) 100 AT24C02A-10PI-1.8 AT24C02AN-10SI-1.8 AT24C02A-10TI-1.8 8P3 8S1 8T Industrial (-40°C to 85°C) Package Type 8P3 8-pin, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8S1 8-lead, 0.
PAGE 14
AT24C04A Ordering Information tWR (max) (ms) ICC (max) (µA) ISB (max) (µA) fMAX (kHz) 10 1500 4 10 800 3 Ordering Code Package Operation Range 100 AT24C04A-10PI-2.7 AT24C04AN-10SI-2.7 AT24C04A-10TI-2.7 8P3 8S1 8T Industrial (-40°C to 85°C) 100 AT24C04A-10PI-1.8 AT24C04AN-10SI-1.8 AT24C04A-10TI-1.8 8P3 8S1 8T Industrial (-40°C to 85°C) Package Type 8P3 8-pin, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8S1 8-lead, 0.
PAGE 15
AT24C02A/04A/08A/16A AT24C08A Ordering Information tWR (max) (ms) ICC (max) (µA) ISB (max) (µA) fMAX (kHz) 10 1500 4 10 800 3 Ordering Code Package Operation Range 100 AT24C08A-10PI-2.7 AT24C08AN-10SI-2.7 8P3 8S1 Industrial (-40°C to 85°C) 100 AT24C08A-10PI-1.8 AT24C08AN-10SI-1.8 8P3 8S1 Industrial (-40°C to 85°C) Package Type 8P3 8-pin, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8S1 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC) Options -2.
PAGE 16
AT24C16A Ordering Information tWR (max) (ms) ICC (max) (µA) ISB (max) (µA) fMAX (kHz) 10 1500 4 10 800 3 Ordering Code Package Operation Range 400 AT24C16A-10PI-2.7 AT24C16AN-10SI-2.7 8P3 8S1 Industrial (-40°C to 85°C) 100 AT24C16A-10PI-1.8 AT24C16AN-10SI-1.8 8P3 8S1 Industrial (-40°C to 85°C) Package Type 8P3 8-pin, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8S1 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC) Options -2.7 Low Voltage (2.7V to 5.5V) -1.
PAGE 17
AT24C02A/04A/08A/16A Packaging Information 8P3 – PDIP D PIN 1 E1 A B1 SEATING PLANE A1 L B B2 e (4 PLACES) E COMMON DIMENSIONS (Unit of Measure = mm) C eC SYMBOL eB Notes: 1. This package conforms to JEDEC reference MS-001 BA. 2. Dimensions D and E1 do not include mold Flash or Protrusion. Mold Flash or Protrusion shall not exceed 0.25 mm (0.010"). R NOM MAX A – – 4.318 A1 0.381 – – D 9.144 – 9.652 E 7.620 – 8.255 E1 6.096 – 6.604 B 0.406 – 0.508 B1 1.397 – 1.
PAGE 18
8S1 – JEDEC SOIC 3 2 1 H N Top View e B A D COMMON DIMENSIONS (Unit of Measure = mm) Side View A2 C L SYMBOL MIN NOM MAX A – – 1.75 B – – 0.51 C – – 0.25 D – – 5.00 E – – 4.00 e E End View NOTE 1.27 BSC H – – 6.20 L – – 1.27 Note: These drawings are for general information only. Refer to JEDEC Drawing MS-012 for proper dimensions, tolerances, datums, etc. 10/10/01 R 18 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TITLE 8S1, 8-lead (0.
PAGE 19
AT24C02A/04A/08A/16A 8T– TSSOP Top View 3 2 1 E E1 N Side View b A2 COMMON DIMENSIONS (Unit of Measure = mm) SYMBOL A e D D NOM MAX NOTE 2.90 3.00 3.10 2, 5 4.40 4.50 3, 5 E E1 End View MIN 6.40 BSC 4.30 A – – 1.20 A2 0.80 1.00 1.05 b 0.19 – 0.30 e L L L1 4 0.65 BSC 0.45 L1 0.60 0.75 1.00 REF Notes: 1. These drawings are for general information only. Refer to JEDEC Drawing MO-153, Variation AA, for proper dimensions, tolerances, datums, etc. 2.
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