AT24HC02B and AT24HC04B 2-wire Automotive Temperature Serial EEPROM 2K (256 x 8) and 4K (512 x 8) DATASHEET Features Write Protect Pin for Hardware Data Protection ̶ Utilizes Different Array Protection Compared to the AT24C02B/04B Medium-voltage and Standard-voltage Operation Automotive Temperature Range -40C to 125C Internally Organized 256 x 8 (2K) or 512 x 8 (4K) 2-Wire Serial Interface Schmitt Trigger, Filtered Inputs for Noise Suppression Bidirectional Data Transfer Protocol 400kHz (2.5V) Compatibility Write Protect Pin for Hardware Data Protection 8-byte Page (2K) or 16-byte Page (4K) Write Modes Partial Page Writes are Allowed Self-timed Write Cycle (5ms max) High-reliability ̶ ̶ 2.5V (VCC = 2.5V to 5.5V) ̶ Endurance: 1,000,000 Write Cycles Data Retention: 100 Years 8-lead JEDEC SOIC and 8-lead TSSOP Packages Description The Atmel® AT24HC02B/04B provides 2,048/4,096 bits of Serial Electrically Erasable and Programmable Read-Only Memory (EEPROM) organized as 256/512 words of 8 bits each. The device is optimized for use in many automotive applications where low-power and low-voltage operation are essential. The AT24HC02B/04B is available in space-saving 8-lead JEDEC SOIC and 8-lead TSSOP packages and is accessed via a 2-wire serial interface. In addition, the entire family operates at voltages from 2.5V to 5.5V. Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 1. Pin Configurations and Pinouts Table 1-1. Pin Name 2. Pin Configurations Function A0 A2 Address Inputs GND Ground VCC Power Supply SDA Serial Data SCL Serial Clock Input WP Write Protect 8-lead TSSOP (Top View) (Top View) A0 1 8 VCC A1 2 7 WP A0 A1 A2 GND A2 3 6 SCL GND 4 5 SDA Note: Drawings are not to scale. 1 2 3 4 8 7 6 5 VCC WP SCL SDA 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 . . . . . . . . . . . . . . . . . . . . . . .5.0mA 2 8-lead SOIC AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 *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. Block Diagram Figure 3-1. Block Diagram VCC GND WP Start Stop Logic SCL SDA Serial Control Logic LOAD Device Address Comparator A2 A1 A0 R/W EN H.V. Pump/Timing COMP LOAD Data Word ADDR/Counter Y DEC Data Recovery INC X DEC 3. EEPROM Serial MUX DOUT/ACK Logic DIN DOUT AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 3 4. Pin Descriptions 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 bi-directional 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, A1, and A0 pins are device address inputs that are hard wired for the AT24HC02B. As many as eight 2K devices may be addressed on a single bus system (see Section 7., “Device Addressing”). The AT24HC04B uses the A2 and A1 inputs for hardware addressing, and a total of four 4K devices may be addressed on a single bus system. The A0 pin is a no connect. Write Protect (WP): The AT24HC02B/04B have 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 the following table. Table 4-1. 4 Write Protect WP Pin Status Part of the Array Protected At VCC Upper Half (1K/2K) Array At GND Normal Read/Write Operations AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 5. Memory Organization AT24HC02B, 2K Serial EEPROM: Internally organized with 32 pages of 8 bytes each, the 2K requires an 8-bit data word address for random word addressing. AT24HC04B, 4K Serial EEPROM: Internally organized with 32 pages of 16 bytes each, the 4K requires an 9-bit data word address for random word addressing. 5.1 Pin Capacitance Table 5-1. Pin Capacitance(1) Applicable over recommended operating range from TA = 25°C, f = 1.0MHz, VCC = +2.5V. 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, SCL) 6 pF VIN = 0V This parameter is characterized and is not 100% tested. DC Characteristics Table 5-2. DC Characteristics Applicable over recommended operating range from: TA = -40°C to +125°C, VCC = +2.5V to +5.5V (unless otherwise noted). Symbol Parameter Test Condition VCC1 Supply Voltage ICC Supply Current VCC = 5.0V Read at 100kHz ICC Supply Current VCC = 5.0V ISB1 Max Units 5.5 V 0.4 1.0 mA Write at 100kHz 2.0 3.0 mA Standby Current VCC = 2.5V VIN = VCC or VSS 1.6 4.0 μA ISB2 Standby Current VCC = 5.0V VIN = VCC or VSS 8.0 18.0 μA ILI Input Leakage Current VIN = VCC or VSS 0.10 3.0 μA ILO Output Leakage Current VOUT = VCC or VSS 0.05 3.0 μA 0.6 VCC x 0.3 V VCC x 0.7 VCC + 0.5 V 0.4 V (1) Input Low Level VIH Input High Level(1) VOL Output Low Level VCC = 2.5V 1. Typ 2.5 VIL Note: Min IOL = 3.0mA VIL min and VIH max are reference only and are not tested. AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 5 5.3 AC Characteristics Table 5-3. AC Characteristics Applicable over recommended operating range from TA = -40°C to +125°C, VCC = +2.5V to +5.5V, CL = 1 TTL Gate and 100pF (unless otherwise noted). Symbol Parameter fSCL Clock Frequency, SCL tLOW Clock Pulse Width Low 1.2 μs tHIGH Clock Pulse Width High 0.6 μs tI Noise Suppression Time(1) tAA Clock Low to Data Out Valid 0.1 (2) Max Units 400 kHz 50 ns 0.9 μs tBUF Time the bus must be free before a new transmission can start. 1.2 μs tHD.STA Start Hold Time 0.6 μs tSU.STA Start Set-up Time 0.6 μs tHD.DAT Data In Hold Time 0 μs tSU.DAT Data In Set-up Time 100 ns tR Inputs Rise Time(2) 300 ns tF Inputs Fall Time(2) 300 ns tSU.STO Stop Set-up Time 0.6 μs tDH Data Out Hold Time 50 ns tWR Write Cycle Time Endurance(2) 5.0V, 25C, Page Mode Notes: 6 Min 1. 2. This parameter is characterized and is not 100% tested (TA = 25C). This parameter is ensured by characterization only. AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 5 1,000,000 ms Write Cycles 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 which 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 command will place the EEPROM in a standby power mode. Figure 6-2. Start and Stop Definition SDA SCL Start Stop AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 7 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 Acknowledge Start Standby Mode: The AT24HC02B/04B features a low-power standby mode which is enabled: Upon power-up. After the receipt of the Stop condition and the completion of any internal operations. Software Reset: After an interruption in protocol, power loss or system reset, any 2-Wire part can be protocol reset by following these steps: Create a Start condition, Clock nine cycles, and Create another Start condition followed by Stop condition. The device is ready for the next communication after above steps have been completed. Figure 6-4. Software Reset Protocol Dummy Clock Cycles SCL 1 2 Start Condition SDA 8 AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 3 8 9 Start Condition Stop Condition Figure 6-5. Bus Timing: SCL — Serial Clock, SDA: Serial Data I/O tHIGH tF tR tLOW tLOW SCL tSU.STA tHD.STA tHD.DAT tSU.DAT tSU.STO SDA In tAA tDH tBUF SDA Out Figure 6-6. Write Cycle Timing: SCL – Serial Clock, SDA – Serial Data I/O 8th bit ACK WORDn tWR(1) Stop Condition Note: 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. AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 9 7. Device Addressing The 2Kand 4K EEPROM devices all require an 8-bit device address word following a Start condition to enable the device for a Read or Write operation. 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 Serial EEPROM devices. The next three bits are the A2, A1, and A0 device address bits for the 2K EEPROM. These three bits must compare to their corresponding hardwired input pins. The 4K EEPROM only uses the A2 and A1 device address bits with the third bit being a memory address bit. The two device address bits must compare to their corresponding hardwired input pins. The A0 pin is no connect. 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 device will return to a standby state. Figure 7-1. 2K 1 Device Address 0 1 0 A2 A1 A0 MSB 4K 1 LSB 0 1 0 A2 A1 P0 MSB 10 R/W AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 R/W LSB 8. Write Operations Byte Write: A Write operation requires an 8-bit data word address following the device address word and acknowledgment. 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 W R I T E Device Address Word Address S T O P Data SDA LINE M S B L R AM S / C S BW K B A C K L A SC BK Page Write: The 2K EEPROM is capable of an 8-byte Page Write, and the 4K EEPROM device is capable of 16-byte Page Writes. 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 seven (2K) or fifteen (4K) 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 three bits (2K) or four (4K) 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 eight (2K) or sixteen (4K) 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 + 1) Data (n) S T O P Data (n + x) SDA Line M S B L R A S / C BWK 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. AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 11 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 device 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 Data SDA Line M S B N O L R A S / C B WK 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 Data n SDA Line M S B LR A M S / C S BW K B Dummy Write 12 AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 L A SC B K M S B L S B A C K N O A C K 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) A C K Data (n + 1) A C K Data (n + 2) A C K S T O P Data (n + x) SDA Line R A / C WK 10. N O A C K Power Recommendation The device internal POR (Power-On Reset) threshold is just below the minimum operating voltage of the device. Power shall rise monotonically from 0.0Vdc to full VCC in less than 1ms. Hold at full VCC for at least 100μs before the first operation. Power shall drop from full VCC to 0.0Vdc in less than 1ms. Power dropping to a non-zero level and then slowly going to zero is not recommended. Power shall remain off (0.0Vdc) for 0.5s minimum. Please consult Atmel if your power conditions do not meet the above recommendations. AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 13 11. Ordering Code Detail AT 2 4 H C 0 2 B N - S P 2 5 - B Atmel Designator Product Family 24HC = 2-Wire Compatible Serial EEPROM with Half Array Protection Shipping Carrier Option B or Blank = Bulk (Tubes) T = Tape and Reel Operating Voltage 25 = 2.5V to 5.5V Device Density 02 = 2 kilobit 04 = 4 kilobit Device Revision 14 Package Device Grade P = NiPdAu Lead Finish Automotive Temperature Range (-40°C to +125°C) Package Variation Package Option (Package Type Dependant) N = 0.150” width SOIC S = JEDEC SOIC T = TSSOP AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 12. Product Markings AT24HC02B & AT24HC04B: Automotive Package Marking Information 8-lead TSSOP 8-lead SOIC ATMLPYWW ### % AAAAAAAA PYWW ### % 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 AT24HC02B Truncation Code ###: H2B 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 2: 2.5V min Grade/Lead Finish Material P: Automotive/NiPdAu Atmel Truncation XX = Trace Code (Atmel Lot Numbers Correspond to Code) Example: AA, AB.... YZ, ZZ AT: Atmel ATM: Atmel ATML: Atmel 4/25/14 TITLE Package Mark Contact: [email protected] 24HC02-04BAM, AT24HC02B & AT24HC04B Automotive Package Marking Information DRAWING NO. REV. 24HC02-04BAM A AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 15 13. Ordering Code Information Atmel Ordering Code Lead Finish Package AT24HC02BN-SP25-B(1) AT24HC02BN-SP25-T(2) (1) AT24HC02B-TP25-B AT24HC04B-TP25-B 1. 2. Automotive Temperature (40C to 125C) 2.5V to 5.5V Automotive Temperature (40C to 125C) 8S1 NiPdAu Lead Finish (Lead-free/Halogen-free) AT24HC04B-TP25-T(2) Notes: 2.5V to 5.5V 8X AT24HC04BN-SP25-B(1) (1) Operation Range 8S1 NiPdAu Lead Finish (Lead-free/Halogen-free) AT24HC02B-TP25-T(2) AT24HC04BN-SP25-T(2) Voltage 8X B = Bulk. T = Tape and reel: SOIC = 4,000 per reel. TSSOP = 5,000 per reel. Package Type 16 8S1 8-lead, 0.150" wide body, Plastic Gull Wing Small Outline (JEDEC SOIC) 8X 8-lead, 4.4mm body, Plastic Thin Shrink Small Outline Package (TSSOP) AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 14. Packaging Information 14.1 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 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. SYMBOL MIN A 1.35 NOM MAX – 1.75 A1 0.10 – 0.25 b 0.31 – 0.51 C 0.17 – 0.25 D 4.80 – 5.05 E1 3.81 – 3.99 E 5.79 – 6.20 e NOTE 1.27 BSC L 0.40 – 1.27 Ø 0° – 8° 6/22/11 Package Drawing Contact: [email protected] TITLE 8S1, 8-lead (0.150” Wide Body), Plastic Gull Wing Small Outline (JEDEC SOIC) GPC SWB DRAWING NO. REV. 8S1 G AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 17 14.2 8X — 8-lead TSSOP C 1 Pin 1 indicator this corner E1 E L1 N L Top View End View A b A1 e D SYMBOL Side View Notes: COMMON DIMENSIONS (Unit of Measure = mm) A2 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 A2 0.80 1.00 1.05 D 2.90 3.00 3.10 2, 5 E NOTE 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] 18 8X, 8-lead 4.4mm Body, Plastic Thin Shrink Small Outline Package (TSSOP) AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 GPC TNR DRAWING NO. 8X REV. E 15. Revision History Doc. Rev. Date Comments 5192D 08/2014 Added power recommendation, part markings, and ordering code detail. Updated template, logos, and disclaimer page. No changes to functional specification. 5192C 01/2009 Removed Preliminary status. 5192B 03/2008 5192A 01/2007 Added information for AT24HC04B. Updated to new template. Initial document release. AT24HC02B/04B Automotive [DATASHEET] Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014 19 XXXXXX Atmel Corporation 1600 Technology Drive, San Jose, CA 95110 USA T: (+1)(408) 441.0311 F: (+1)(408) 436.4200 | www.atmel.com © 2014 Atmel Corporation. / Rev.: Atmel-5192D-SEEPROM-AT24HC02B-04B-Auto-Datasheet_082014. Atmel®, Atmel logo and combinations thereof, Enabling Unlimited Possibilities®,and others are registered trademarks or trademarks of Atmel Corporation in U.S. and other countries. Other terms and product names may be trademarks of others. DISCLAIMER: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. 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