AT24HC04B I2C-Compatible (2-Wire) Serial EEPROM 4K (512 x 8) DATASHEET Features Write Protect Pin for Hardware Data Protection ̶ Utilizes Different Array Protection Compared to the AT24C04B Low-voltage and Standard-voltage Operation Internally Organized 512 x 8 (4K) 2-Wire Serial Interface Schmitt Trigger, Filtered Inputs for Noise Suppression Bidirectional Data Transfer Protocol 1MHz (5V) and 400kHz (1.8V, 2.5V, 2.7V) Clock Rate 16-byte Page Partial Page Writes Allowed Self-timed Write Cycle (5ms Max) High Reliability ̶ ̶ 1.8V (VCC = 1.8V to 5.5V) ̶ Endurance: 1,000,000 Write Cycles Data Retention: 100 Years 8-lead PDIP, 8-lead JEDEC SOIC, and 8-lead TSSOP Packages Die Sales: Wafer Form, Tape and Reel, and Bumped Wafers Description The Atmel® AT24HC04B provides 4,096 bits of Serial Electrically Erasable and Programmable Read-Only Memory (EEPROM) organized as 512 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 AT24HC04B is available in space-saving 8-lead PDIP, 8-lead JEDEC SOIC, and 8-lead TSSOP packages and is accessed via a 2-wire serial interface. In addition, the entire family is available in 1.8V (1.8V to 5.5V) version. Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 1. Pin Configurations and Pinouts Table 1-1. Pin Configuration Pin Name Function NC No Connect NC 1 8 VCC NC 1 8 VCC A1 and A2 Address Inputs A1 2 7 WP A1 2 7 WP A2 3 6 SCL A2 3 6 SCL GND 4 5 SDA GND 4 5 SDA SDA Serial Data SCL Serial Clock Input WP Write Protect VCC Device Power Supply 8-lead PDIP 8-lead SOIC Top View Top View 8-lead TSSOP NC A1 A2 GND 1 2 3 4 8 7 6 5 VCC WP SCL SDA Top View Note: 2. Absolute Maximum Ratings* Operating Temperature . . . . . . . . . . .-40C 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 2 Drawings are not to scale. AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 *Notice: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage 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. 3. Block Diagram Figure 3-1. Block Diagram VCC GND WP START STOP LOGIC SERIAL CONTROL LOGIC LOAD DEVICE ADDRESS COMPARATOR A2 A1 A0 R/W EN H.V. PUMP/TIMING COMP LOAD DATA RECOVERY INC DATA WORD ADDR/COUNTER X DEC SCL SDA Y DEC EEPROM SERIAL MUX DOUT/ACK LOGIC DIN DOUT 4. 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 (A2, A1, and A0): The A2 and A1 pins are device address inputs that must be hardwired for the AT24HC04B. As many as four 4K devices may be addressed on a single bus system. The A0 pin is a no connect. (Device addressing and Page addressing are discussed in detail in Section 7., “Device Addressing and Page Addressing”). Write Protect (WP): The AT24HC04B has a WP pin which provides hardware data protection. The WP pin allows normal read/write operations when connected to ground (GND). When the WP pin is connected to VCC, the write protection feature is enabled and operates as shown. Table 4-1. Write Protect WP Pin Status Part of the Array Protected At VCC Upper Half (2K) Array At GND Normal Read/Write Operations AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 3 5. Memory Organization AT24HC04B, 4K Serial EEPROM: The 4K is internally organized with 32 pages of 16 bytes each. Random word addressing requires an 9-bit data word address. 5.1 Pin Capacitance (1) Applicable over recommended operating range from TAI = 25C, f = 1.0MHz, VCC = +1.8V. Symbol Test Condition CI/O CIN Note: 5.2 1. Max Units Conditions Input/Output Capacitance (SDA) 8 pF VI/O = 0V Input Capacitance (A0, A1, A2, and SCL) 6 pF VIN = 0V This parameter is characterized and is not 100% tested. DC Characteristics Applicable over recommended operating range from: TAI = -40C to +85C, VCC = +1.8V to +5.5V (unless otherwise noted). Symbol Parameter VCC1 Supply Voltage VCC2 Max Units 1.80 5.50 V Supply Voltage 2.50 5.50 V VCC3 Supply Voltage 2.70 5.50 V VCC4 Supply Voltage 4.50 5.50 V ICC Supply Current VCC = 5.0V Read at 100kHz 0.40 1 mA ICC Supply Current VCC = 5.0V Write at 100kHz 2 3 mA ISB1 Standby Current VCC = 1.8V VIN = VCC or VSS 0.60 3 μA ISB2 Standby Current VCC = 2.5V VIN = VCC or VSS 1.40 4 μA ISB3 Standby Current VCC = 2.7V VIN = VCC or VSS 1.60 4 μA ISB4 Standby Current VCC = 5.0V VIN = VCC or VSS 8 18 μA ILI Input Leakage Current VIN = VCC or VSS 0.10 3 μA ILO Output Leakage Current VOUT = VCC or VSS 0.05 3 μA VIL Input Low Level (1) 0.60 VCC x 0.30 V VIH Input High Level (1) VCC x 0.70 VCC + 0.50 V VOL2 Output Low Level VCC = 3.0V IOL = 2.10mA 0.40 V VOL1 Output Low Level VCC = 1.8V IOL = 0.15mA 0.20 V Note: 4 1. Test Condition VIL min and VIH max are reference only and are not tested. AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 Min Typ Table 5-1. AC Characteristics Applicable over recommended operating range from TAI = –40C to +85C, VCC = +5.5V, CL = 1 TTL Gate and 100pF (unless otherwise noted). Test conditions are listed in Note 2. 1.8V, 2.5V, 2.7V Symbol Parameter Min Max 5V Min Units 1000 kHz fSCL Clock Frequency, SCL tLOW Clock Pulse Width Low 1.20 0.40 μs tHIGH Clock Pulse Width High 0.60 0.40 μs tI Noise Suppression Time tAA Clock Low to Data Out Valid 0.10 tBUF Time the bus must be free before a new transmission can start. 1.20 0.50 μs tHD.STA Start Hold Time 0.60 0.25 μs tSU.STA Start Setup Time 0.60 0.25 μs tHD.DAT Data In Hold Time 0 0 μs tSU.DAT Data In Setup Time 100 100 ns tR Inputs Rise Time (1) 0.30 0.30 μs tF Inputs Fall Time (1) 300 100 ns tSU.STO Stop Setup Time tDH Data Out Hold Time tWR Write Cycle Time Endurance(1) 5.0V, 25C, Byte Mode Notes: 1. 2. 400 Max 50 0.90 0.05 40 ns 0.55 μs 0.60 .25 μs 50 50 ns 5 5 1,000,000 ms Write Cycles This parameter is ensured by characterization only. AC measurement conditions: RL (connects to VCC): 1.3k (2.5V, 5.5V), 10k (1.7V) Input pulse voltages: 0.3VCC to 0.7VCC Input rise and fall times: 50ns Input and output timing reference voltages: 0.5 x VCC AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 5 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. Data changes during SCL high periods will indicate a Start or Stop condition as defined below. Figure 6-1. Data Validity SDA SCL Data Stable Data Stable Data Change Start Condition: A high-to-low transition of SDA with SCL high is a Start condition that must precede any other command. Stop Condition: A low-to-high transition of SDA with SCL high is a Stop condition. After a read sequence, the Stop condition will place the EEPROM in a standby power mode. Figure 6-2. Start and Stop Definition SDA SCL Start 6 AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 Stop Acknowledge: All addresses and data words are serially transmitted to and from the EEPROM in 8-bit words.. The EEPROM sends a zero to acknowledge that it has received each word. This happens during the ninth clock cycle. Figure 6-3. Output Acknowledge 1 SCL 8 9 DATA IN DATA OUT Start Acknowledge Standby Mode: The AT24HC04B features a low-power standby mode that is enabled: Upon power-up. After the receipt of the Stop condition, and the completion of any internal operations. 2-Wire Software Reset: After an interruption in protocol, power loss or system reset, any 2-wire part can be protocol reset by following these steps: 1. 2. 3. Create a start condition (if possible). Clock nine cycles. Create another Start condition followed by Stop condition as shown below. The device should be ready for the next communication after above steps have been completed. In the event that the device is still non-responsive or remains active on the SDA bus, a power cycle must be used to reset the device. Figure 6-4. Software Reset Dummy Clock Cycles SCL 1 Start Condition 2 3 8 9 Start Condition Stop Condition SDA AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 7 Figure 6-5. Bus Timing tHIGH tF tR tLOW SCL tSU.STA tLOW tHD.STA tHD.DAT tSU.DAT tSU.STO SDA IN tAA tDH tBUF SDA OUT Figure 6-6. Write Cycle Timing SCL SDA 8th bit ACK WORDn twr Stop Condition Note: 8 1. (1) Start Condition The write cycle time tWR is the time from a valid Stop condition of a write sequence to the end of the internal clear/write cycle. AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 7. Device Addressing and Page Addressing The 4K EEPROM device requires an 8-bit device address word following a Start condition to enable the chip for a read or write operation, as shown in the below figure. Figure 7-1. 4K 1 MSB Device Address 0 1 0 A2 A1 P0 R/W LSB The device address word consists of a mandatory “1”, “0” sequence for the first four most significant bits as shown. This is common to all the EEPROM devices. The next two bits are the A2 and A1 device address bits for the 4K EEPROM. These two bits must compare to their corresponding hardwired input pins. The A0 pin is a no connect. The next bit is the memory page address bit. This bit is the MSB of the 9-bit data word address. The eighth bit of the device address is the read/write operation select bit. A read operation is initiated if this bit is high, and a write operation is initiated if this bit is low. Upon a compare of the device address, the EEPROM will output a zero. If a compare is not made, the chip will return to a standby state. AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 9 8. Write Operations Byte Write: A Write operation requires an 8-bit data word address following the device address word and acknowledgement. Upon receipt of this address, the EEPROM will again respond with a zero, and then clock in the first 8-bit data word. Following receipt of the 8-bit data word, the EEPROM will output a zero and the addressing device, such as a microcontroller, must terminate the write sequence with a Stop condition. At this time, the EEPROM enters an internally-timed write cycle, tWR, to the nonvolatile memory. All inputs are disabled during this write cycle, and the EEPROM will not respond until the write is complete. Figure 8-1. 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 M S / C S BW K B L A S C B K A C K Page Write: The 4K EEPROM is capable of a 16-byte Page Write. A Page Write is initiated the same as a Byte Write, but the microcontroller does not send a Stop condition after the first data word is clocked in. Instead, after the EEPROM acknowledges receipt of the first data word, the microcontroller can transmit up to fifteen more data words. The EEPROM will respond with a zero after each data word received. The microcontroller must terminate the Page Write sequence with a Stop condition. The data word address lower four bits are internally incremented following the receipt of each data word. The higher data word address bits are not incremented, retaining the memory page row location. When the word address, internally generated, reaches the page boundary, the following byte is placed at the beginning of the same page. If more than sixteen data words are transmitted to the EEPROM, the data word address will roll-over and previous data will be overwritten. Figure 8-2. 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 Acknowledge Polling: Once the internally-timed write cycle has started and the EEPROM inputs are disabled, Acknowledge Polling can be initiated. This involves sending a Start condition followed by the device address word. The Read/Write bit is representative of the operation desired. Only if the internal write cycle has completed will the EEPROM respond with a zero allowing the read or write sequence to continue. 10 AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 9. 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 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. The address roll-over during read is from the last byte of the last memory page to the first byte of the first page. The address roll-over during write is from the last byte of the current page to the first byte of the same page. Once the device address with the Read/Write select bit set to one is clocked in and acknowledged by the EEPROM, the current address data word is serially clocked out. The microcontroller does not respond with an input zero but does generate a following Stop condition. Figure 9-1. Current Address Read S T A R T Device Address R E A D S T O P SDA LINE L R A S / C BW K M S B Data N O A C K Random Read: A Random Read requires a dummy byte write sequence to load in the data word address. Once the device address word and data word address are clocked in and acknowledged by the EEPROM, the microcontroller must generate another Start condition. The microcontroller now initiates a Current Address Read by sending a device address with the Read/Write select bit high. The EEPROM acknowledges the device address and serially clocks out the data word. The microcontroller does not respond with a zero but does generate a following Stop condition. Figure 9-2. 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 M S / C S BW K 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 AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 11 Sequential Read: Sequential Reads are initiated by either a current address read or a Random Address Read. After the microcontroller receives a data word, it responds with an acknowledge. As long as the EEPROM receives an Acknowledge, it will continue to increment the data word address and serially clock out sequential data words. When the memory address limit is reached, the data word address will roll-over and the Sequential Read will continue. The Sequential Read operation is terminated when the microcontroller does not respond with a zero but does generate a following Stop condition. Figure 9-3. Sequential Read Device Address R E A D Data (n) Data (n + 1) Data (n + 2) S T O P Data (n + x) SDA Line R A / C WK 12 AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 A C K A C K A C K N O A C K 10. Ordering Code Detail AT2 4 H C 0 4 B N - S H - B Shipping Carrier Option Atmel Designator B or Blank = Bulk (Tubes) T = Tape and Reel Product Family Package Device Grade or Wafer/Die Thickness 24HC = I2C-compatible Serial EEPROM with Half Array Protection H = Green, NiPdAu Lead Finish Industrial Temperature Range (-40°C to +85°C) U = Green, Matte Tin Lead Finish Industrial Temperature Range (-40°C to +85°C) 11 = 11mil Wafer Thickness Device Density 04 = 4 kilobit Device Revision Package Option Package Variation S T P W (Package Type Dependent) N = 0.150” width SOIC 11. = JEDEC SOIC = TSSOP = PDIP = Wafer Unsawn Ordering Code Information Delivery Information Atmel Ordering Code AT24HC04B-PU Lead Finish Matte Tin (Lead-free/Halogen-free) Package Voltage 8P3 AT24HC04BN-SH-B Form Quantity Bulk (Tubes) 50 per Tube Bulk (Tubes) 100 per Tube Tape and Reel 4,000 per Reel Bulk (Tubes) 100 per Tube Tape and Reel 5,000 per Reel Operation Range 8S1 AT24HC04BN-SH-T AT24HC04B-TH-B NiPdAu 1.8V (Lead-free/Halogen-free) Industrial Temperature (-40C to 85C) 8X AT24HC04B-TH-T AT24HC04B-W-11 Note: N/A Wafer Sale Note 1 1. Available in tape and reel and wafer form; order as SL788 for inkless wafer form. Bumped die available upon request. Please contact the Atmel sales office. Package Type 8P3 8-pin, 0.30” wide, Plastic Dual Inline (PDIP) 8S1 8-lead, 0.15” wide, Plastic Gull Wing Small Outline (JEDEC SOIC) 8X 8-lead, 4.40mm body, Plastic Thin Shrink Small Outline (TSSOP) AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 13 12. Part Marking Scheme AT24HC04B Package Marking Information 8-lead TSSOP 8-lead SOIC ATMLHYWW ### % AAAAAAAA 8-lead PDIP HYWW ###% ATMLUYWW ### % AAAAAAAA Note: Lot Number and location of assembly and on the bottom side of the package. Note 1: designates pin 1 Note 2: Package drawings are not to scale Catalog Number Truncation AT24HC04B Truncation Code ###: H4B Date Codes Y = Year 4: 2014 5: 2015 6: 2016 7: 2017 Voltages 8: 2018 9: 2019 0: 2020 1: 2021 M = Month A: January B: February ... L: December WW = Work Week of Assembly 02: Week 2 04: Week 4 ... 52: Week 52 Country of Assembly Lot Number @ = Country of Assembly AAA...A = Atmel Wafer Lot Number Trace Code % = Minimum Voltage 1: 1.8V min Grade/Lead Finish Material U: Industrial/Matte Tin/SnAgCu H: Industrial/NiPdAu Atmel Truncation XX = Trace Code (Atmel Lot Numbers Correspond to Code) Example: AA, AB.... YZ, ZZ AT: Atmel ATM: Atmel ATML: Atmel 6/10/15 TITLE DRAWING NO. REV. 24HC04BSM B 24HC04BSM, AT24HC04B Package Marking Information Package Mark Contact: [email protected] 14 AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 13. Packaging Information 13.1 8P3 — 8-lead PDIP E 1 E1 .381 Gage Plane N Top View c eA End View COMMON DIMENSIONS (Unit of Measure = mm) D e D1 A2 A A1 b2 b3 b v 4 PLCS Side View L 0.254 m C SYMBOL MIN MAX A - - 5.334 A1 0.381 - - NOTE 2 A2 2.921 3.302 4.953 b 0.356 0.457 0.559 5 b2 1.143 1.524 1.778 6 b3 0.762 0.991 1.143 6 c 0.203 0.254 0.356 D 9.017 9.271 10.160 3 D1 0.127 0.000 0.000 3 E 7.620 7.874 8.255 4 E1 6.096 6.350 7.112 3 3.810 2 e 2.540 BSC eA L Notes: NOM 7.620 BSC 2.921 3.302 4 1. This drawing is for general information only; refer to JEDEC Drawing MS-001, Variation BA for additional information. 2. Dimensions A and L are measured with the package seated in JEDEC seating plane Gauge GS-3. 3. D, D1 and E1 dimensions do not include mold Flash or protrusions. Mold Flash or protrusions shall not exceed 0.010 inch. 4. E and eA measured with the leads constrained to be perpendicular to datum. 5. Pointed or rounded lead tips are preferred to ease insertion. 6. b2 and b3 maximum dimensions do not include Dambar protrusions. Dambar protrusions shall not exceed 0.010 (0.25 mm). 07/31/14 Package Drawing Contact: [email protected] TITLE GPC DRAWING NO. 8P3, 8-lead, 0.300” Wide Body, Plastic Dual In-line Package (PDIP) PTC 8P3 AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 REV. E 15 13.2 8S1 — 8-lead JEDEC SOIC C 1 E E1 L N Ø TOP VIEW END VIEW e b COMMON DIMENSIONS (Unit of Measure = mm) A A1 SYMBOL A MIN – – 1.75 A1 0.10 – 0.25 b 0.31 – 0.51 C 0.17 – 0.25 D D SIDE VIEW Notes: This drawing is for general information only. Refer to JEDEC Drawing MS-012, Variation AA for proper dimensions, tolerances, datums, etc. MAX NOM NOTE 4.90 BSC E 6.00 BSC E1 3.90 BSC e 1.27 BSC L 0.40 – 1.27 Ø 0° – 8° 3/6/2015 Package Drawing Contact: [email protected] 16 TITLE 8S1, 8-lead (0.150” Wide Body), Plastic Gull Wing Small Outline (JEDEC SOIC) AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 GPC SWB DRAWING NO. REV. 8S1 H 13.3 8X — 8-lead TSSOP C 1 Pin 1 indicator this corner E1 E L1 N L Top View End View A b A1 e COMMON DIMENSIONS (Unit of Measure = mm) A2 D SYMBOL Side View Notes: 1. This drawing is for general information only. Refer to JEDEC Drawing MO-153, Variation AA, for proper dimensions, tolerances, datums, etc. 2. Dimension D does not include mold Flash, protrusions or gate burrs. Mold Flash, protrusions and gate burrs shall not exceed 0.15mm (0.006in) per side. 3. Dimension E1 does not include inter-lead Flash or protrusions. Inter-lead Flash and protrusions shall not exceed 0.25mm (0.010in) per side. 4. Dimension b does not include Dambar protrusion. Allowable Dambar protrusion shall be 0.08mm total in excess of the b dimension at maximum material condition. Dambar cannot be located on the lower radius of the foot. Minimum space between protrusion and adjacent lead is 0.07mm. 5. Dimension D and E1 to be determined at Datum Plane H. MIN NOM MAX A - - 1.20 A1 0.05 - 0.15 NOTE A2 0.80 1.00 1.05 D 2.90 3.00 3.10 2, 5 E 6.40 BSC E1 4.30 4.40 4.50 3, 5 b 0.19 0.25 0.30 4 e L 0.65 BSC 0.45 L1 C 0.60 0.75 1.00 REF 0.09 - 0.20 2/27/14 TITLE Package Drawing Contact: [email protected] 8X, 8-lead 4.4mm Body, Plastic Thin Shrink Small Outline Package (TSSOP) GPC TNR DRAWING NO. 8X AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 REV. E 17 14. 18 Revision History Doc. Rev. Date 5227H 12/2015 5227G 06/2015 Comments Corrected the ordering code detail. Updated package drawings, ordering code table, and part marking page. Added the ordering code detail. Updated Atmel template (no changes to functional specification). logos, and disclaimer page, part markings to a single page, and package drawings 8P3, 8S1, and 8A2 to 8X. 5227F 02/2014 5227E 11/2008 Updated pin configurations. 5227D 01/2008 Removed ‘preliminary’ status. 5227C 08/2007 Added Part Marking Scheme. 5227B 08/2007 5227A 04/2007 Updated the Random Read figure and add the AC measurement conditions note to the AC Characteristics table. Updated to new template and common figures. Added Part Marking tables. Initial document release. AT24HC04B [DATASHEET] Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015 XXXXXX Atmel Corporation 1600 Technology Drive, San Jose, CA 95110 USA T: (+1)(408) 441.0311 F: (+1)(408) 436.4200 | www.atmel.com © 2015 Atmel Corporation. / Rev.: Atmel-5227H-SEEPROM-AT24HC04B-Datasheet_122015. 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