Low-power CMOS technology ORG pin to select word size for `66C version x 8-bit organization `A' ver. devices (no ORG) x 16-bit organization `B' ver. devices (no ORG) Self-timed ERASE/WRITE cycles (including auto-erase) Automatic ERAL before WRAL Power on/off data protection circuitry Industry standard 3-wire serial I/O Device Status signal (READY/BUSY) Sequential READ function 1,000,000 E/W cycles Data retention > 200 years Temperature ranges supported: - Industrial (I) - Automotive (E) to +125�C

The Microchip Technology Inc. 93XX66A/B/C devices are 4K bit low voltage serial Electrically Erasable PROMs (EEPROM). Word-selectable devices such as the or 93C66C are dependent upon external logic levels driving the ORG pin to set word size. For dedicated 8-bit communication, the or 93C66A devices are available, while the 93AA66B, 93LC66B and 93C66B devices provide dedicated 16-bit communication. Advanced CMOS technology makes these devices ideal for low power, non-volatile memory applications. The entire 93XX Series is available in standard packages including 8-lead PDIP and SOIC, and advanced packaging including 8-lead MSOP, 6-lead SOT-23, and 8-lead TSSOP. Pb-free (Pure Matte Sn) finish is also available.

Name CS CLK DI DO VSS NC ORG VCC Chip Select Serial Data Clock Serial Data Input Serial Data Output Ground No internal connection Memory Configuration Power Supply

VCC.............................................................................................................................................................................7.0V All inputs and outputs w.r.t. VSS......................................................................................................... -0.6V to VCC +1.0V Storage to +150�C Ambient temperature with power to +125�C ESD protection on all pins...................................................................................................................................................... 4 kV

NOTICE: Stresses above 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 those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

VCC = range by device (see Table on Page 1) Industrial (I): to +85�C Automotive (E): to +125�C Min 2.0 0.7 VCC -0.3 2.4 VCC - 0.2 Typ 500 100 Max VCC +1 VCC 0.8 0.2 VCC Units mA �A Conditions VCC 2.7V VCC < 2.7V VCC 2.7V VCC < 2.7V IOL = 2.1 mA, VCC = 4.5V IOL = 100 �A, VCC = 2.5V IOH = -400 �A, VCC = 4.5V IOH = -100 �A, VCC = 2.5V VIN = VSS to VCC VOUT = VSS to VCC VIN/VOUT = 0V (Note = 25�C, FCLK = 1 MHz FCLK = 3 MHz, Vcc = 5.5V FCLK = 2 MHz, Vcc = 2.5V FCLK = 3 MHz, VCC = 5.5V FCLK = 2 MHz, VCC = 3.0V FCLK = 2 MHz, VCC I � Temp E � Temp CLK = 0V ORG DI = VSS or VCC (Note 2) (Note 3) (Note 1)

All parameters apply over the specified ranges unless otherwise noted. Param. Symbol No. VOH1 VOH2 ILI ILO CIN, COUT Parameter High-level input voltage Low-level input voltage Low-level output voltage High-level output voltage Input leakage current Output leakage current Pin capacitance (all inputs/ outputs)

This parameter is periodically sampled and not 100% tested. ORG pin not available on `A' or `B' versions. READY/BUSY status must be cleared from DO, see Section 3.4 "Data Out (DO)".

VCC = range by device (see Table on Page 1) Industrial (I): to +85�C Automotive (E): to +125�C Min Max 2 1 Units MHz ns ms Conditions 4.5V VCC 5.5V, 93XX66C only 2.5V VCC 5.5V 1.8V VCC 2.5V 4.5V VCC 5.5V, 93XX66C only 2.5V VCC 5.5V 1.8V VCC 2.5V 4.5V VCC 5.5V, 93XX66C only 2.5V VCC 5.5V 1.8V VCC 2.5V 4.5V VCC 5.5V 2.5V VCC 4.5V 1.8V VCC 2.5V 1.8V VCC 5.5V 1.8V VCC 5.5V 4.5V VCC 5.5V, 93XX66C only 2.5V VCC 5.5V 1.8V VCC 2.5V 4.5V VCC 5.5V, 93XX66C only 2.5V VCC 5.5V 1.8V VCC 2.5V 4.5V VCC pF 2.5V VCC pF 1.8V VCC pF 4.5V VCC < 5.5V, (Note 1) 1.8V VCC < 4.5V, (Note 1) 4.5V VCC pF 2.5V VCC pF 1.8V VCC 100 pF Erase/Write mode (AA and LC versions) Erase/Write mode (93C versions) ERAL mode, 4.5V VCC 5.5V WRAL mode, 4.5V VCC 5.5V All parameters apply over the specified ranges unless otherwise noted. Param. Symbol No. A1 FCLK Parameter Clock frequency

This parameter is periodically sampled and not 100% tested. This application is not tested but ensured by characterization. For endurance estimates in a specific application, please consult the Total EnduranceTM Model which may be obtained from www.microchip.com.