AT93C46

•Low Voltage and Standard Voltage Operation

5.0 (VCC = 4.5V to 5.5V)2.7 (VCC = 2.7V to 5.5V)2.5 (VCC = 2.5V to 5.5V)•1.8 (VCC = 1.8V to 5.5V)

User Selectable Internal Organization

1K: 128 x 8 or 64 x 162K: 256 x 8 or 128 x 16•4K: 512 x 8 or 256 x 16•3-Wire Serial Interface

•2 MHz Clock Rate (5V) Compatibility•Self-Timed Write Cycle (10 ms max)High Reliability

Endurance: 1 Million Cycles•Data Retention: 100 Years

•

Automotive Grade and Extended Temperature Devices Available8-Pin PDIP, JEDEC SOIC, and EIAJ SOIC Packages

Description

The AT93C46/56/57/66 provides 1024/2048/4096 bits of serial electrically erasableprogrammable read only memory (EEPROM) organized as 64/128/256 words of 16bits each, when the ORG Pin is connected to VCC and 128/256/512 words of 8 bitseach when it is tied to ground. The device is optimized for use in many industrial andcommercial applications where low power and low voltage operation are essential.The AT93C46/56/57/66 is available in space saving 8-pin PDIP and 8-pin JEDEC andEIAJ SOIC packages.

(continued)Pin Configurations

Pin NameFunction8-Pin PDIP

CSChip SelectSKSerial Data ClockDISerial Data InputDOSerial Data OutputGNDGroundVCCPower SupplyORGInternal OrganizationDCDon’t Connect8-Pin SOIC8-Pin SOIC

Rotated (R)(1K JEDEC Only)

AT93C46/56/57/66

3-WireSerial CMOS E2PROMs1K (128 x 8 or 64 x 16)2K (256 x 8 or 128 x 16)4K (512 x 8 or 256 x 16)AT93C46/56/57/660172J2-63

Description (Continued)

The AT93C46/56/57/66 is enabled through the Chip Se-lect pin (CS), and accessed via a 3-wire serial interfaceconsisting of Data Input (DI), Data Output (DO), and ShiftClock (SK). Upon receiving a READ instruction at DI, theaddress is decoded and the data is clocked out serially onthe data output pin DO. The WRITE cycle is completelyself-timed and no separate ERASE cycle is required be-fore WRITE. The WRITE cycle is only enabled when thepart is in the ERASE/WRITE ENABLE state. When CS isbrought “high” following the initiation of a WRITE cycle, theDO pin outputs the READY/BUSY status of the part.The AT93C46/56/57/66 is available in 4.5V to 5.5V, 2.7Vto 5.5V, 2.5V to 5.5V, and 1.8V to 5.5V versions.

Absolute Maximum Ratings*

Operating Temperature...................-55°C to +125°CStorage Temperature......................-65°C to +150°CVoltage on Any Pinwith Respect to Ground.....................-1.0V to +7.0VMaximum Operating Voltage...........................6.25VDC Output Current.........................................5.0 mA*NOTICE: Stresses beyond those listed under “Absolute Maxi-mum Ratings” may cause permanent damage to the device.This is a stress rating only and functional operation of thedevice at these or any other conditions beyond those indi-cated in the operational sections of this specification is notimplied. Exposure to absolute maximum rating conditionsfor extended periods may affect device reliability.

Block Diagram (1)

Note:

1. When the ORG pin is connected to VCC , the x 16 organization is selected. When it is connected to ground, the x 8 organiza-tion is selected. If the ORG pin is left unconnected, then an internal pullup device (of approximately 1 MΩ) will select the x16 organization. This feature is not available on 1.8V devices.

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AT93C46/56/57/66

AT93C46/56/57/66

Pin Capacitance (1)

Applicable over recommended operating range from TA = 25°C, f = 1.0 MHz, VCC = +5.0V (unless otherwise noted).

Test ConditionsCOUTCINNote:

Max55UnitspFpFConditionsVOUT = 0VVIN = 0VOutput Capacitance (DO)Input Capacitance (CS, SK, DI)1.This parameter is characterized and is not 100% tested.

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).SymbolVCC2VCC3VCC4ICCISB1ISB2ISB3ISB4IILIOLParameterSupply VoltageSupply VoltageSupply VoltageSupply CurrentVCC = 5.0VVCC = 1.8VVCC = 2.5VVCC = 2.7VVCC = 5.0VREAD at 1.0 MHzWRITE at 1.0 MHzCS = 0VCS = 0VCS = 0VCS = 0VTest ConditionMin1.82.52.74.50.50.506.06.017TypMax5.55.55.55.52.02.00.110.010.0301.01.00.8VCC + 1VCC x 0.3VCC + 10.42.40.2VCC - 0.2UnitVVVVmAmAµAµAµAµAµAµAVVVVVVVCC1 Supply VoltageStandby CurrentStandby CurrentStandby CurrentStandby CurrentInput LeakageOutput LeakageVIN = 0V to VCC 0.1VIN = 0V to VCC 0.1-0.1 2.00.0VCC x 0 .7IOL = 2.1 mAIOH = -0.4 mAIOL = 0.15 mAIOH = -100 µA(1)VIL1 Input Low Voltage4.5V ≤ VCC ≤ 5.5V(1)Input High VoltageVIH1 VIL2 (1)VIH2 (1)VOL1VOH1VOL2VOH2Note:

Input Low VoltageInput High VoltageOutput Low VoltageOutput High VoltageOutput Low VoltageOutput High Voltage1.8V ≤ VCC ≤ 2.7V4.5V ≤ VCC ≤ 5.5V1.8V ≤ VCC ≤ 2.7V1.VIL min and VIH max are reference only and are not tested.

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AC Characteristics

Applicable over recommended operating range from TA = -40°C to + 85°C, VCC = As Specified, CL = 1 TTL Gate and 100 pF (unless otherwise noted).SymbolfSKParameterSK ClockFrequencyTest Condition4.5V ≤ VCC ≤ 5.5V2.7V ≤ VCC ≤ 5.5V2.5V ≤ VCC ≤ 5.5V1.8V ≤ VCC ≤ 5.5V4.5V ≤ VCC ≤ 5.5V2.7V ≤ VCC ≤ 5.5V2.5V ≤ VCC ≤ 5.5V1.8V ≤ VCC ≤ 5.5V4.5V ≤ VCC ≤ 5.5V2.7V ≤ VCC ≤ 5.5V2.5V ≤ VCC ≤ 5.5V1.8V ≤ VCC ≤ 5.5V4.5V ≤ VCC ≤ 5.5V2.7V ≤ VCC ≤ 5.5V2.5V ≤ VCC ≤ 5.5V1.8V ≤ VCC ≤ 5.5VRelative to SK4.5V ≤ VCC ≤ 5.5V2.7V ≤ VCC ≤ 5.5V2.5V ≤ VCC ≤ 5.5V1.8V ≤ VCC ≤ 5.5V4.5V ≤ VCC ≤ 5.5V2.7V ≤ VCC ≤ 5.5V2.5V ≤ VCC ≤ 5.5V1.8V ≤ VCC ≤ 5.5V4.5V ≤ VCC ≤ 5.5V2.7V ≤ VCC ≤ 5.5V2.5V ≤ VCC ≤ 5.5V1.8V ≤ VCC ≤ 5.5V4.5V ≤ VCC ≤ 5.5V2.7V ≤ VCC ≤ 5.5V2.5V ≤ VCC ≤ 5.5V1.8V ≤ VCC ≤ 5.5V4.5V ≤ VCC ≤ 5.5V2.7V ≤ VCC ≤ 5.5V2.5V ≤ VCC ≤ 5.5V1.8V ≤ VCC ≤ 5.5V4.5V ≤ VCC ≤ 5.5V2.7V ≤ VCC ≤ 5.5V2.5V ≤ VCC ≤ 5.5V1.8V ≤ VCC ≤ 5.5V4.5V ≤ VCC ≤ 5.5V2.7V ≤ VCC ≤ 5.5V2.5V ≤ VCC ≤ 5.5V1.8V ≤ VCC ≤ 5.5V0.14.5V ≤ VCC ≤ 5.5V1Min00002502505001000250250500100025025050010005050100200100100200400010010020040025025050010002502505001000250250500100010010020040010TypMax210.50.25UnitsMHztSKHSK High TimenstSKLSK Low TimenstCSMinimum CS LowTimenstCSSCS Setup TimenstDIStCSHtDIHDI Setup TimeCS Hold TimeDI Hold TimeRelative to SKRelative to SKRelative to SKnsnsnstPD1Output Delay to ‘1’AC TestnstPD0Output Delay to ‘0’AC TestnstSVCS to Status ValidAC TestnstDFCS to DO in HighImpedanceWrite Cycle TimeAC TestCS = VILnsmsmstWP2-66

AT93C46/56/57/66

AT93C46/56/57/66

Instruction Set for the AT93C46InstructionREADEWENERASEWRITEERALWRALEWDSSB1111111OpCode10001101000000Addressx 8A6 - A011XXXXXA6 - A0A6 - A010XXXXX01XXXXX00XXXXXx 16A5 - A011XXXXA5 - A0A5 - A010XXXX01XXXX00XXXXD7 - D0D15 - D0D7 - D0D15 - D0x 8Datax 16CommentsReads data stored in memory, atspecified address.Write enable must precede allprogramming modes.Erase memory location An - A0.Writes memory location An - A0.Erases all memory locations. Validonly at VCC = 4.5V to 5.5V.Writes all memory locations. Validonly at VCC = 4.5V to 5.5V.Disables all programminginstructions.Instruction Set for the AT93C57InstructionREADEWENERASEWRITEERALWRALEWDSSB1111111OpCode10001101000000Addressx 8A7 - A011XXXXXXA7 - A0A7 - A010XXXXXX01XXXXXX00XXXXXXx 16A6 - A011XXXXXA6 - A0A6 - A010XXXXX01XXXXX00XXXXXD7 - D0D15 - D0D7 - D0D15 - D0x 8Datax 16CommentsReads data stored in memory, atspecified address.Write enable must precede allprogramming modes.Erase memory location An - A0.Writes memory location An - A0.Erases all memory locations. Validonly at VCC = 4.5V to 5.5V.Writes all memory locations. Validonly at VCC = 4.5V to 5.5V.Disables all programming instructions.

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Instruction Set for the AT93C56 and AT93C66

InstructionREADEWENERASEWRITEERALWRALEWDSSB1111111OpCode10001101000000Addressx 8A8 - A011XXXXXXXA8 - A0A8 - A010XXXXXXX01XXXXXXX00XXXXXXXx 16A7 - A011XXXXXXA7 - A0A7 - A010XXXXXX01XXXXXX00XXXXXXD7 - D0D15 - D0D7 - D0D15 - D0x 8Datax 16CommentsReads data stored in memory, atspecified address.Write enable must precede allprogramming modes.Erases memory location An - A0.Writes memory location An - A0.Erases all memory locations. Validonly at VCC = 4.5V to 5.5V.Writes all memory locations. Validwhen VCC = 5.0V ± 10% andDisable Register cleared.Disables all programminginstructions.2-68

AT93C46/56/57/66

AT93C46/56/57/66

Functional Description

The AT93C46/56/57/66 is accessed via a simple and ver-satile 3-wire serial communication interface. Device op-eration is controlled by seven instructions issued by thehost processor. A valid instruction starts with a rising edgeof CS and consists of a Start Bit (logic ‘1’) followed by theappropriate Op Code and the desired memory Addresslocation.

READ (READ): The Read (READ) instruction containsthe Address code for the memory location to be read. Afterthe instruction and address are decoded, data from theselected memory location is available at the serial outputpin DO. Output data changes are synchronized with therising edges of serial clock SK. It should be noted that adummy bit (logic ‘0’) precedes the 8 or 16 bit data outputstring.

ERASE/WRITE (EWEN): To assure data integrity, thepart automatically goes into the Erase/Write Disable(EWDS) state when power is first applied. An Erase/WriteEnable (EWEN) instruction must be executed first beforeany programming instructions can be carried out. Pleasenote that once in the Erase/Write Enable state, program-ming remains enabled until an Erase/Write Disable(EWDS) instruction is executed or VCC power is removedfrom the part.

ERASE (ERASE): The Erase (ERASE) instruction pro-grams all bits in the specified memory location to the logi-cal ‘1’ state. The self-timed erase cycle starts once theERASE instruction and address are decoded. The DO pinoutputs the READY/BUSY status of the part if CS isbrought high after being kept low for a minimum of 250 ns(tCS). A logic ‘1’ at pin DO indicates that the selected mem-ory location has been erased, and the part is ready foranother instruction.

WRITE (WRITE): The Write (WRITE) instruction con-tains the 8 or 16 bits of data to be written into the specifiedmemory location. The self-timed programming cycle startsafter the last bit of data is received at serial data input pinDI. The DO pin outputs the READY/BUSY status of thepart if CS is brought high after being kept low for a mini-mum of 250 ns (tCS). A logic ‘0’ at DO indicates that pro-gramming is still in progress. A logic ‘1’ indicates that thememory location at the specified address has been writtenwith the data pattern contained in the instruction and thepart is ready for further instructions. A READY/BUSYstatus cannot be obtained if the CS is brought high afterthe end of the self-timed programming cycle, tWP.ERASE ALL (ERAL): The Erase All (ERAL) instructionprograms every bit in the memory array to the logic ‘1’state and is primarily used for testing purposes. The DOpin outputs the READY/BUSY status of the part if CS isbrought 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) instructionprograms all memory locations with the data patternsspecified in the instruction. The DO pin outputs theREADY/BUSY status of the part if CS is brought high afterbeing kept low for a minimum of 250 ns (tCS). The WRALinstruction is valid only at VCC = 5.0V ± 10%.

ERASE/WRITE DISABLE (EWDS): To protect againstaccidental data disturb, the Erase/Write Disable (EWDS)instruction disables all programming modes and should beexecuted after all programming operations. The operationof the READ instruction is independent of both the EWENand EWDS instructions and can be executed at any time.

Timing Diagrams

Synchronous Data Timing

Note:1. This is the minimum SK period.

(continued)

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Organization Key for Timing Diagrams

AT93C46 (1K)I/OANDNNote:

AT93C56 (2K)x 8A8 (1)D7x 16A7D15AT93C57 (2K)x 8A7D7x 16A6D15AT93C66 (4K)x 8A8D7x 16A7D15x 8A6D7x 16A5D151.A8 is a DON’T CARE value, but the extra clock is required.

Timing Diagrams (Continued)

READ Timing

EWEN Timing

EWDS Timing

(continued)2-70

AT93C46/56/57/66

AT93C46/56/57/66

Timing Diagrams (Continued)

WRITE Timing

WRAL Timing (1)

Note:1.Valid only at VCC = 4.5V to 5.5V.

ERASE Timing

(continued)

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Timing Diagrams (Continued)

TERAL Timing(1)

Note:1.Valid only at VCC = 4.5V to 5.5V.

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AT93C46/56/57/66

AT93C46/56/57/66

Ordering Information

tWP (max)(ms)10ICC (max)(µA)2000ISB (max)(µA)30.0fMAX(kHz)2000Ordering CodeAT93C46-10PCAT93C46-10SCAT93C46R-10SCAT93C46W-10SCAT93C46-10PC-2.7AT93C46-10SC-2.7AT93C46R-10SC-2.7AT93C46W-10SC-2.7AT93C46-10PC-2.5AT93C46-10SC-2.5AT93C46R-10SC-2.5AT93C46W-10SC-2.5AT93C46-10PC-1.8AT93C46-10SC-1.8AT93C46R-10SC-1.8AT93C46W-10SC-1.8AT93C46-10PIAT93C46-10SIAT93C46R-10SIAT93C46W-10SIAT93C46-10PI-2.7AT93C46-10SI-2.7AT93C46R-10SI-2.7AT93C46W-10SI-2.7AT93C46-10PI-2.5AT93C46-10SI-2.5AT93C46R-10SI-2.5AT93C46W-10SI-2.5AT93C46-10PI-1.8AT93C46-10SI-1.8AT93C46R-10SI-1.8AT93C46W-10SI-1.8Package8P38S18S18S28P38S18S18S28P38S18S18S28P38S18S18S28P38S18S18S28P38S18S18S28P38S18S18S28P38S18S18S2Operation RangeCommercial(0°C to 70°C)1080010.01000Commercial(0°C to 70°C)1060010.0500Commercial(0°C to 70°C)10800.1250Commercial(0°C to 70°C)10200030.02000Industrial(-40°C to 85°C)1080010.01000Industrial(-40°C to 85°C)1060010.0500Industrial(-40°C to 85°C)10800.1250Industrial(-40°C to 85°C)

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Ordering Information

Package Type8P38S18S28 Lead, 0.300\" Wide, Plastic Dual Inline Package (PDIP)8 Lead, 0.150\" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC)8 Lead, 0.200\" Wide, Plastic Gull Wing Small Outline (EIAJ SOIC)OptionsBlank-2.7-2.5-1.8RStandard Device (4.5V to 5.5V)Low Voltage (2.7V to 5.5V)Low Voltage (2.5V to 5.5V)Low Voltage (1.8V to 5.5V)Rotated Pinout2-74

AT93C46/56/57/66

AT93C46/56/57/66

Ordering Information

tWP (max)(ms)10ICC (max)(µA)2000ISB (max)(µA)30.0fMAX(kHz)2000Ordering CodeAT93C56-10PCAT93C56-10SCAT93C56W-10SCAT93C56-10PC-2.7AT93C56-10SC-2.7AT93C56W-10SC-2.7AT93C56-10PC-2.5AT93C56-10SC-2.5AT93C56W-10SC-2.5AT93C56-10PC-1.8AT93C56-10SC-1.8AT93C56W-10SC-1.8AT93C56-10PIAT93C56-10SIAT93C56W-10SIAT93C56-10PI-2.7AT93C56-10SI-2.7AT93C56W-10SI-2.7AT93C56-10PI-2.5AT93C56-10SI-2.5AT93C56W-10SI-2.5AT93C56-10PI-1.8AT93C56-10SI-1.8AT93C56W-10SI-1.8Package8P38S18S28P38S18S28P38S18S28P38S18S28P38S18S28P38S18S28P38S18S28P38S18S2Operation RangeCommercial(0°C to 70°C)Commercial(0°C to 70°C)Commercial(0°C to 70°C)Commercial(0°C to 70°C)Industrial(-40°C to 85°C)Industrial(-40°C to 85°C)Industrial(-40°C to 85°C)Industrial(-40°C to 85°C)1080010.010001060010.050010800.125010200030.020001080010.010001060010.050010800.1250Package Type8P38S18S28 Lead, 0.300\" Wide, Plastic Dual Inline Package (PDIP)8 Lead, 0.150\" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC)8 Lead, 0.200\" Wide, Plastic Gull Wing Small Outline (EIAJ SOIC)OptionsBlank-2.7-2.5-1.8Standard Device (4.5V to 5.5V)Low Voltage (2.7V to 5.5V)Low Voltage (2.5V to 5.5V)Low Voltage (1.8V to 5.5V)

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Ordering Information

tWP (max)(ms)10ICC (max)(µA)2000ISB (max)(µA)30.0fMAX(kHz)2000Ordering CodeAT93C57-10PCAT93C57-10SCAT93C57W-10SCAT93C57-10PC-2.7AT93C57-10SC-2.7AT93C57W-10SC-2.7AT93C57-10PC-2.5AT93C57-10SC-2.5AT93C57W-10SC-2.5AT93C57-10PC-1.8AT93C57-10SC-1.8AT93C57W-10SC-1.8AT93C57-10PIAT93C57-10SIAT93C57W-10SIAT93C57-10PI-2.7AT93C57-10SI-2.7AT93C57W-10SI-2.7AT93C57-10PI-2.5AT93C57-10SI-2.5AT93C57W-10SI-2.5AT93C57-10PI-1.8AT93C57-10SI-1.8AT93C57W-10SI-1.8Package8P38S18S28P38S18S28P38S18S28P38S18S28P38S18S28P38S18S28P38S18S28P38S18S2Operation RangeCommercial(0°C to 70°C)Commercial(0°C to 70°C)Commercial(0°C to 70°C)Commercial(0°C to 70°C)Industrial(-40°C to 85°C)Industrial(-40°C to 85°C)Industrial(-40°C to 85°C)Industrial(-40°C to 85°C)1080010.010001060010.050010800.125010200030.020001080010.010001060010.050010800.1250Package Type8P38S18S28 Lead, 0.300\" Wide, Plastic Dual Inline Package (PDIP)8 Lead, 0.150\" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC)8 Lead, 0.200\" Wide, Plastic Gull Wing Small Outline (EIAJ SOIC)OptionsBlank-2.7-2.5-1.8Standard Device (4.5V to 5.5V)Low Voltage (2.7V to 5.5V)Low Voltage (2.5V to 5.5V)Low Voltage (1.8V to 5.5V)2-76

AT93C46/56/57/66

AT93C46/56/57/66

Ordering Information

tWP (max)(ms)10ICC (max)(µA)2000ISB (max)(µA)30.0fMAX(kHz)2000Ordering CodeAT93C66-10PCAT93C66-10SCAT93C66W-10SCAT93C66-10PC-2.7AT93C66-10SC-2.7AT93C66W-10SC-2.7AT93C66-10PC-2.5AT93C66-10SC-2.5AT93C66W-10SC-2.5AT93C66-10PC-1.8AT93C66-10SC-1.8AT93C66W-10SC-1.8AT93C66-10PIAT93C66-10SIAT93C66W-10SIAT93C66-10PI-2.7AT93C66-10SI-2.7AT93C66W-10SI-2.7AT93C66-10PI-2.5AT93C66-10SI-2.5AT93C66W-10SI-2.5AT93C66-10PI-1.8AT93C66-10SI-1.8AT93C66W-10SI-1.8Package8P38S18S28P38S18S28P38S18S28P38S18S28P38S18S28P38S18S28P38S18S28P38S18S2Operation RangeCommercial(0°C to 70°C)Commercial(0°C to 70°C)Commercial(0°C to 70°C)Commercial(0°C to 70°C)Industrial(-40°C to 85°C)Industrial(-40°C to 85°C)Industrial(-40°C to 85°C)Industrial(-40°C to 85°C)1080010.010001060010.050010800.125010200030.020001080010.010001060010.050010800.1250Package Type8P38S18S28 Lead, 0.300\" Wide, Plastic Dual Inline Package (PDIP)8 Lead, 0.150\" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC)8 Lead, 0.200\" Wide, Plastic Gull Wing Small Outline (EIAJ SOIC)OptionsBlank-2.7-2.5-1.8Standard Device (4.5V to 5.5V)Low Voltage (2.7V to 5.5V)Low Voltage (2.5V to 5.5V)Low Voltage (1.8V to 5.5V)

2-77