Features • Low-voltage and Standard-voltage Operation • • • • • • – 2.7 (VCC = 2.7V to 5.5V) – 1.8 (VCC = 1.8V to 5.5V) Three-wire Serial Interface 2 MHz Clock Rate (5V) Compatibility Self-timed Write Cycle (10 ms max) High Reliability – Endurance: 1 Million Write Cycles – Data Retention: 100 Years Automotive Grade, Extended Temperature, and Lead-free/Halogen-free Devices Available 8-lead PDIP, 8-lead JEDEC SOIC, and 8-lead TSSOP Packages Three-wire Serial EEPROM Description 1K (64 x 16) The AT93C46A provides 1024 bits of serial electrically-erasable programmable readonly memory (EEPROM) organized as 64 words of 16 bits each. The device is optimized for use in many industrial and commercial applications where low-power and low-voltage operation are essential. The AT93C46A is available in space-saving 8lead PDIP, 8-lead JEDEC SOIC, and 8-lead TSSOP packages. AT93C46A The AT93C46A is enabled through the Chip Select pin (CS) and accessed via a threewire serial interface consisting of Data Input (DI), Data Output (DO), and Shift Clock (SK). Upon receiving a Read instruction at DI, the address is decoded and the data is clocked out serially on the data output DO pin. The write cycle is completely self-timed and no separate erase cycle is required before write. The write cycle is only enabled when the part is in the erase/write enable state. When CS is brought high following the initiation of a write cycle, the DO pin outputs the ready/busy status of the part. Note: Not recommended for new design; please refer to AT93C46E datasheet. The AT93C46A is available in 2.7V to 5.5V and 1.8V to 5.5V versions. Table 1. Pin Configuration Pin Name Function CS Chip Select SK Serial Data Clock DI Serial Data Input DO Serial Data Output GND Ground VCC Power Supply 8-lead PDIP CS SK DI DO 1 2 3 4 8 7 6 5 VCC DC NC GND 8-lead SOIC CS SK DI DO 1 2 3 4 VCC DC NC GND 8 7 6 5 8-lead TSSOP CS SK DI DO 1 2 3 4 8 7 6 5 VCC DC NC GND Rev. 0539K–SEEPR–2/07 1 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 DC Output Current........................................................ 5.0 mA *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. Figure 1. Block Diagram MEMORY ARRAY 64 X 16 ADDRESS DECODER DATA REGISTER OUTPUT BUFFER MODE DECODE LOGIC CLOCK GENERATOR 2 AT93C46A 0539K–SEEPR–2/07 AT93C46A Table 2. Pin Capacitance(1) Applicable over recommended operating range from TA = 25°C, f = 1.0 MHz, VCC = +5.0V (unless otherwise noted) Symbol Test Conditions COUT CIN Note: Max Units Conditions Output Capacitance (DO) 5 pF VOUT = 0V Input Capacitance (CS, SK, DI) 5 pF VIN = 0V This parameter is characterized and is not 100% tested. Table 3. DC Characteristics Applicable over recommended operating range from: TAI = −40°C to +85°C, VCC = +1.8V to +5.5V, (unless otherwise noted) Symbol Parameter VCC1 Supply Voltage VCC2 Test Condition Min Typ Max Units 1.8 5.5 V Supply Voltage 2.7 5.5 V VCC3 Supply Voltage 4.5 5.5 V ICC Supply Current VCC = 5.0V ISB1 Standby Current ISB2 Read at 1.0 MHz 0.5 2.0 mA Write at 1.0 MHz 0.5 2.0 mA VCC = 1.8V CS = 0V 14.0 20.0 µA Standby Current VCC = 2.7V CS = 0V 14.0 20.0 µA ISB3 Standby Current VCC = 5.0V CS = 0V 35.0 50.0 µA IIL Input Leakage VIN = 0V to VCC 0.1 1.0 µA Output Leakage VIN = 0V to VCC 0.1 1.0 µA VIL1 VIH1(1) Input Low Voltage Input High Voltage 2.7V ≤ VCC ≤ 5.5V −0.6 2.0 0.8 VCC + 1 V VIL2(1) VIH2(1) Input Low Voltage Input High Voltage 1.8V ≤ VCC ≤ 2.7V −0.6 VCC x 0.7 VCC x 0.3 VCC + 1 V VOL1 VOH1 Output Low Voltage Output High Voltage 2.7V ≤ VCC ≤ 5.5V 0.4 V VOL2 VOH2 Output Low Voltage Output High Voltage 1.8V ≤ VCC ≤ 2.7V IOL (1) Note: IOL = 2.1 mA IOH = −0.4 mA 2.4 IOL = 0.15 mA IOH = −100 µA V 0.2 VCC − 0.2 V V 1. VIL min and VIH max are reference only and are not tested. 3 0539K–SEEPR–2/07 Table 4. AC Characteristics Applicable over recommended operating range from TA = −40°C to + 85°C, VCC = +2.5V to + 5.5V, CL = 1 TTL Gate and 100 pF (unless otherwise noted) Symbol Parameter Test Condition fSK SK Clock Frequency 4.5V ≤ VCC ≤ 5.5V 2.7V ≤ VCC ≤ 5.5V 1.8V ≤ VCC ≤ 5.5V 0 0 0 tSKH SK High Time 4.5V ≤ VCC ≤ 5.5V 2.7V ≤ VCC ≤ 5.5V 1.8V ≤ VCC ≤ 5.5V 250 250 1000 ns tSKL SK Low Time 4.5V ≤ VCC ≤ 5.5V 2.7V ≤ VCC ≤ 5.5V 1.8V ≤ VCC ≤ 5.5V 250 250 1000 ns tCS Minimum CS Low Time 4.5V ≤ VCC ≤ 5.5V 2.7V ≤ VCC ≤ 5.5V 1.8V ≤ VCC ≤ 5.5V 250 250 1000 ns tCSS CS Setup Time Relative to SK 4.5V ≤ VCC ≤ 5.5V 2.7V ≤ VCC ≤ 5.5V 1.8V ≤ VCC ≤ 5.5V 50 50 200 ns tDIS DI Setup Time Relative to SK 4.5V ≤ VCC ≤ 5.5V 2.7V ≤ VCC ≤ 5.5V 1.8V ≤ VCC ≤ 5.5V 100 100 400 ns tCSH CS Hold Time Relative to SK 0 ns tDIH DI Hold Time Relative to SK 4.5V ≤ VCC ≤ 5.5V 2.7V ≤ VCC ≤ 5.5V 1.8V ≤ VCC ≤ 5.5V 100 100 400 ns tPD1 Output Delay to “1” AC Test 4.5V ≤ VCC ≤ 5.5V 2.7V ≤ VCC ≤ 5.5V 1.8V ≤ VCC ≤ 5.5V 250 250 1000 ns tPD0 Output Delay to “0” AC Test 4.5V ≤ VCC ≤ 5.5V 2.7V ≤ VCC ≤ 5.5V 1.8V ≤ VCC ≤ 5.5V 250 250 1000 ns tSV CS to Status Valid AC Test 4.5V ≤ VCC ≤ 5.5V 2.7V ≤ VCC ≤ 5.5V 1.8V ≤ VCC ≤ 5.5V 250 250 1000 ns tDF CS to DO in High Impedance AC Test CS = VIL 4.5V ≤ VCC ≤ 5.5V 2.7V ≤ VCC ≤ 5.5V 1.8V ≤ VCC ≤ 5.5V 100 100 400 ns 10 ms tWP Endurance Note: 4 (1) Min Write Cycle Time 0.1 5.0V, 25°C 1M Typ 3 Max Units 2 1 0.25 MHz Write Cycle 1. This parameter is characterized and is not 100% tested. AT93C46A 0539K–SEEPR–2/07 AT93C46A Functional Description The AT93C46A is accessed via a simple and versatile three-wire serial communication interface. Device operation is controlled by seven instructions issued by the host processor. A valid instruction starts with a rising edge of CS and consists of a start bit (logic “1”) followed by the appropriate op code and the desired memory address location. Table 5. Instruction Set for the AT93C46A Address Instruction SB Op Code x 16 Comments READ 1 10 A5 − A0 Reads data stored in memory, at specified address EWEN 1 00 11XXXX Write enable must precede all programming modes ERASE 1 11 A5 − A0 Erase memory location An − A0 WRITE 1 01 A5 − A0 Writes memory location An − A0 ERAL 1 00 10XXXX Erases all memory locations. Valid only at VCC = 4.5V to 5.5V WRAL 1 00 01XXXX Writes all memory locations. Valid only at VCC = 4.5V to 5.5V EWDS 1 00 00XXXX Disables all programming instructions READ (READ): The Read (READ) instruction contains the address code for the memory location to be read. After the instruction and address are decoded, data from the selected memory location is available at the serial output pin DO. Output data changes are synchronized with the rising edges of serial clock SK. It should be noted that a dummy bit (logic “0”) precedes the 16-bit data output string. ERASE/WRITE ENABLE (EWEN): To assure data integrity, the part automatically goes into the Erase/Write Disable (EWDS) state when power is first applied. An Erase/Write Enable (EWEN) instruction must be executed first before any programming instructions can be carried out. Please note that once in the EWEN state, programming remains enabled until an EWDS instruction is executed or VCC power is removed from the part. ERASE (ERASE): The Erase (ERASE) instruction programs all bits in the specified memory location to the logical “1” state. The self-timed erase cycle starts once the Erase instruction and address are decoded. The DO pin outputs the ready/busy status of the part if CS is brought high after being kept low for a minimum of 250 ns (tCS). A logic “1” at pin DO indicates that the selected memory location has been erased and the part is ready for another instruction. WRITE (WRITE): The Write (WRITE) instruction contains the 16 bits of data to be written into the specified memory location. The self-timed programming cycle, tWP, starts after the last bit of data is received at serial data input pin DI. The DO pin outputs the ready/busy status of the part if CS is brought high after being kept low for a minimum of 250 ns (tCS). A logic “0” at DO indicates that programming is still in progress. A logic “1” indicates that the memory location at the specified address has been written with the data pattern contained in the instruction and the part is ready for further instructions. A ready/busy status cannot be obtained if the CS is brought high after the end of the selftimed programming cycle, tWP. ERASE ALL (ERAL): The Erase All (ERAL) instruction programs every bit in the memory array to the logic “1” state and is primarily used for testing purposes. The DO pin outputs the ready/busy status of the part if CS is brought high after being kept low for a minimum of 250 ns (tCS). The ERAL instruction is valid only at VCC = 5.0V ± 10%. WRITE ALL (WRAL): The Write All (WRAL) instruction programs all memory locations with the data patterns specified in the instruction. The DO pin outputs the ready/busy 5 0539K–SEEPR–2/07 status of the part if CS is brought high after being kept low for a minimum of 250 ns (tCS). The WRAL instruction is valid only at VCC = 5.0V ± 10%. ERASE/WRITE DISABLE (EWDS): To protect against accidental data disturb, the Erase/Write Disable (EWDS) instruction disables all programming modes and should be executed after all programming operations. The operation of the Read instruction is independent of both the EWEN and EWDS instructions and can be executed at any time. Timing Diagrams Figure 2. Synchronous Data Timing µs (1) Note: 1. This is the minimum SK period. Table 6. Organization Key for Timing Diagrams AT93C46A 6 I/O x 16 AN A5 DN D15 AT93C46A 0539K–SEEPR–2/07 AT93C46A Figure 3. READ Timing tCS High Impedance Figure 4. EWEN Timing1 tCS CS SK DI Note: 1 0 0 1 1 ... 1. Requires a minimum of nine clock cycles. Figure 5. EWDS Timing1 tCS CS SK DI Note: 1 0 0 0 0 ... 1. Requires a minimum of nine clock cycles. 7 0539K–SEEPR–2/07 Figure 6. WRITE Timing tCS CS SK DI DO 1 0 1 ... AN A0 DN ... D0 HIGH IMPEDANCE BUSY READY tWP Figure 7. WRAL Timing(1 ),( 2 ) tCS CS SK DI DO 1 0 0 0 1 ... DN ... D0 BUSY HIGH IMPEDANCE READY tWP Notes: 1. Valid only at VCC = 4.5V to 5.5V. 2. Requires a minimum of nine clock cycles. Figure 8. ERASE Timing tCS CS STANDBY CHECK STATUS SK DI 1 1 1 AN AN-1 AN-2 ... A0 tDF tSV DO HIGH IMPEDANCE HIGH IMPEDANCE BUSY READY tWP 8 AT93C46A 0539K–SEEPR–2/07 AT93C46A Figure 9. ERAL Timing(1) tCS CS CHECK STATUS STANDBY tSV tDF SK DI DO 1 0 0 1 0 BUSY HIGH IMPEDANCE HIGH IMPEDANCE READY tWP Note: 1. Valid only at VCC = 4.5V to 5.5V. 9 0539K–SEEPR–2/07 Ordering Information(1) Ordering Code Package Operation Range 8P3 8P3 8S1 8S1 8A2 8A2 Lead-free/Halogen-free/ Industrial Temperature (−40°C to 85°C) AT93C46A-10PU-2.7 AT93C46A-10PU-1.8 AT93C46A-10SU-2.7 AT93C46A-10SU-1.8 AT93C46A-10TU-2.7 AT93C46A-10TU-1.8 Notes: 1. For 2.7V devices used in the 4.5V to 5.5V range, please refer to performance values in Table 3 on page 3 and Table 4 on page 4. Not recommended for new design. Please see AT93C46E datasheet. Package Type 8P3 8-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8S1 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC) 8A2 8-lead, 0.170" Wide, Thin Small Outline Package (TSSOP) Options −2.7 Low Voltage (2.7V to 5.5V) −1.8 Low Voltage (1.8V to 5.5V) 10 AT93C46A 0539K–SEEPR–2/07 AT93C46A Packaging Information 8P3 – PDIP E 1 E1 N Top View c eA End View COMMON DIMENSIONS (Unit of Measure = inches) D e D1 A2 A MIN NOM A2 0.115 0.130 0.195 b 0.014 0.018 0.022 5 b2 0.045 0.060 0.070 6 b3 0.030 0.039 0.045 6 c 0.008 0.010 0.014 D 0.355 0.365 0.400 D1 0.005 E 0.300 0.310 0.325 4 E1 0.240 0.250 0.280 3 SYMBOL A b2 b3 b 4 PLCS Side View L Notes: 0.210 0.100 BSC eA 0.300 BSC 0.115 NOTE 2 3 3 e L MAX 0.130 4 0.150 2 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). 01/09/02 R 2325 Orchard Parkway San Jose, CA 95131 TITLE 8P3, 8-lead, 0.300" Wide Body, Plastic Dual In-line Package (PDIP) DRAWING NO. REV. 8P3 B 11 0539K–SEEPR–2/07 8S1 – JEDEC SOIC C 1 E E1 L N ∅ Top View End View e B COMMON DIMENSIONS (Unit of Measure = mm) A SYMBOL A1 D Side View MIN NOM MAX A 1.35 – 1.75 A1 0.10 – 0.25 b 0.31 – 0.51 C 0.17 – 0.25 D 4.80 – 5.00 E1 3.81 – 3.99 E 5.79 – 6.20 e NOTE 1.27 BSC L 0.40 – 1.27 ∅ 0˚ – 8˚ Note: These drawings are for general information only. Refer to JEDEC Drawing MS-012, Variation AA for proper dimensions, tolerances, datums, etc. 10/7/03 R 12 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TITLE 8S1, 8-lead (0.150" Wide Body), Plastic Gull Wing Small Outline (JEDEC SOIC) DRAWING NO. 8S1 REV. B AT93C46A 0539K–SEEPR–2/07 AT93C46A 8A2 – TSSOP 3 2 1 Pin 1 indicator this corner E1 E L1 N L Top View End View COMMON DIMENSIONS (Unit of Measure = mm) SYMBOL A b D MIN NOM MAX NOTE 2.90 3.00 3.10 2, 5 3, 5 E e D A2 6.40 BSC E1 4.30 4.40 4.50 A – – 1.20 A2 0.80 1.00 1.05 b 0.19 – 0.30 e Side View L 0.65 BSC 0.45 L1 Notes: 4 0.60 0.75 1.00 REF 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 0.15 mm (0.006 in) per side. 3. Dimension E1 does not include inter-lead Flash or protrusions. Inter-lead Flash and protrusions shall not exceed 0.25 mm (0.010 in) per side. 4. Dimension b does not include Dambar protrusion. Allowable Dambar protrusion shall be 0.08 mm 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 0.07 mm. 5. Dimension D and E1 to be determined at Datum Plane H. 5/30/02 R 2325 Orchard Parkway San Jose, CA 95131 TITLE 8A2, 8-lead, 4.4 mm Body, Plastic Thin Shrink Small Outline Package (TSSOP) DRAWING NO. 8A2 REV. B 13 0539K–SEEPR–2/07 Revision History 14 Doc. Rev. Date Comments 0539K 2/2007 Implemented revision history. Added Note to page 1 and ordering information; Not recommended for new design; please refer to AT93C46E datasheet. AT93C46A 0539K–SEEPR–2/07 Atmel Headquarters Atmel Operations Corporate Headquarters Memory 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 487-2600 Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland TEL (41) 26-426-5555 FAX (41) 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong TEL (852) 2721-9778 FAX (852) 2722-1369 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL (81) 3-3523-3551 FAX (81) 3-3523-7581 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France TEL (33) 2-40-18-18-18 FAX (33) 2-40-18-19-60 ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France TEL (33) 4-42-53-60-00 FAX (33) 4-42-53-60-01 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany TEL (49) 71-31-67-0 FAX (49) 71-31-67-2340 1150 East Cheyenne Mtn. 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