ACE93C46 Three-wire Serial EEPROM Description The ACE93C46 provides 1024 bits of serial electrically erasable programmable read only memory (EEPROM) organized as 64 words of 16 bits each, when the ORG pin is connected to VCC and 128 words of 8 bits each when it is tied to ground. The ACE93C46 is available in space-saving 8-lead PDIP, 8-lead TSSOP and 8-lead JEDEC SOIC packages. The ACE93C46 is enabled through the Chip Select pin (CS), and accessed via a 3-wire 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 pin DO. The WRITE cycle is completely self-timed and no separate erase cycle is required before write. The Write cycle is only enabled when it 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. Features Low-voltage operation – 1.8 (VCC=1.8 to 5.5V) Three-wire serial Interface 2MHz clock rate(5V) compatibility Self-timed write cycle (5 ms max) High-reliability – Endurance: 1 Million write cycles Data retention: 100 Years Packaging Type DIP-8 SOP-8 TSSOP-8 Pin Configurations Pin Name Function CS Chip select SK Serial Data Clock DI Serial Data Input DO Serial Data Output GND Ground Vcc Power Supply ORG Internal Organization DC Don’t Connect VER 1.4 1 ACE93C46 Three-wire Serial EEPROM Block Diagram Note: When the ORG pin is connected to VCC, the “x 16” organization is selected. When it is connected to ground, the “x 8” organization is selected. If the ORG pin is left unconnected and the application does not load the input beyond the capability of the internal 1 Meg ohm pullup, then the “x 16” organization is selected. Absolute Maximum Ratings DC Supply Voltage -0.3 to 6.5V Input / Output Voltage GND -0.3 to Vcc 0.3V Operating Ambient Temperature -40 to 85℃ Storage Temperature -65 to 150℃ *Notice: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to this device. These are stress ratings only. Functional operation of this device at these or any other conditions above those indicated in the operational sections of this specification is not implied or intended. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability. VER 1.4 2 ACE93C46 Three-wire Serial EEPROM Ordering information ACE93C46 XX + X H Halogen-free U : Tube T : Tape and Reel Pb - free DP : DIP-8 FM : SOP-8 TM : TSSOP-8 Pin Capacitance Applicable over recommended operating range from TA=25℃, f=1.0MHz,VCC=+1.8V (unless otherwise noted) Test Conditions Symbol Max Unit Conditions Output Capacitance (DO) COUT 5 pF VOUT=0V Input Capacitance (CS, SK, DI) CIN 5 pF VIN=0V DC Characteristics Applicable over recommended operating range from: TA = -40℃ to +85℃, VCC = +1.8V to +5.5V, (unless otherwise noted). Symbol Parameter VCC1 Supply Voltage VCC2 VCC3 Test Condition Min Typ Max Units 1.8 5.5 V Supply Voltage 2.7 5.5 V Supply Voltage 4.5 5.5 V mA VCC = 5.0V, ICC1 Supply Current Read at 1.0MHz 0.2 2.0 Write at 1.0MHz 0.9 3.0 ISB1 Standby Current VCC = 1.8V, CS=0V 1.0 µA ISB2 Standby Current VCC = 2.7V, CS=0V 1.0 µA ISB3 Standby Current VCC = 5.0V, CS=0V 1.0 µA ILI(1) Input Leakage VIN = 0 to VCC 0.1 1.0 µA ILI(2) Input Leakage VIN = 0 to VCC 2.0 3.0 µA IOL Output Leakage VIN = 0 to VCC 0.1 1.0 µA VIL1(3) Input Low Voltage 2.7V≦Vcc≦5.5V -0.3 0.8 V VIH1(3) Input High Voltage 2.7V≦Vcc≦5.5V 2.0 Vcc+0.3 V VIL2(3) Input Low Voltage 1.8V≦Vcc≦2.7V -0.3 Vcc+0.3 V VIH2(3) Input High Voltage 1.8V≦Vcc≦2.7V Vcc*0.7 Vcc+0.3 V VER 1.4 3 ACE93C46 Three-wire Serial EEPROM Symbol Parameter Test Condition VOL1 Output Low Voltage 2.7V≦Vcc≦5.5V VOH1 Output High Voltage VOL2 Output Low Voltage VOH2 Output High Voltage Min Typ IOL=2.1mA IOH=-0.4mA Max Units 0.4 V 0.2 V 2.4 1.8V≦Vcc≦2.7V IOL=0.15mA IOH=-100uA Vcc-0.2 Note: 1. DI.CS. SK input pin 2. ORG input pin 3. VIL min and VIH max are reference only and are not tested. Applicable over recommended operating range from: TA = -40℃ to +85℃, VCC = +1.8V to +5.5V, CL=1TTL Gate and 100pF (unless otherwise noted). Symbol fsx tskh tskl tcs tcss tdis tcsh tdih Parameter Test Condition Min 4.5≦Vcc≦5.5v 0 2 2.7≦Vcc≦5.5V 0 1 1.8V≦Vcc≦5.5V 0 0.25 4.5≦Vcc≦5.5v 250 2.7≦Vcc≦5.5V 250 1.8V≦Vcc≦5.5V 1000 4.5≦Vcc≦5.5v 250 2.7≦Vcc≦5.5V 250 1.8V≦Vcc≦5.5V 1000 4.5≦Vcc≦5.5v 250 2.7≦Vcc≦5.5V 250 1.8V≦Vcc≦5.5V 1000 SK Clock Frequency SK High Time SK Low Time Minimum CS Low Time CS Setup Time DI Setup Time Relative to SK Relative to SK CS Hold Time DI Hold Time 4.5≦Vcc≦5.5v 50 2.7≦Vcc≦5.5V 50 1.8V≦Vcc≦5.5V 200 4.5≦Vcc≦5.5v 100 2.7≦Vcc≦5.5V 100 1.8V≦Vcc≦5.5V 400 Relative to SK Relative to SK 0 4.5≦Vcc≦5.5v 100 2.7≦Vcc≦5.5V 100 1.8V≦Vcc≦5.5V 400 Typ Max Units MHz ns ns ns ns ns ns ns VER 1.4 4 ACE93C46 Three-wire Serial EEPROM Symbol Parameter Test Condition Output Delay to “1” tpd1 Output Delay to “0” tpd0 tsv CS to Status Valid tdf CS=VIL Write Cycle Time Endurance(1) 5.0V, 25℃ 2.7≦Vcc≦5.5V 250 1.8V≦Vcc≦5.5V 1000 4.5≦Vcc≦5.5v 250 2.7≦Vcc≦5.5V 250 1.8V≦Vcc≦5.5V 1000 4.5≦Vcc≦5.5v 250 2.7≦Vcc≦5.5V 250 1.8V≦Vcc≦5.5V 1000 4.5≦Vcc≦5.5v 100 2.7≦Vcc≦5.5V 100 1.8V≦Vcc≦5.5V 400 AC Test Impedance twp 250 AC Test AC Test Typ Max 4.5≦Vcc≦5.5v AC Test CS to DO in High Min 1.5 Units ns ns ns ns 5 ms Write 1M Cycle Note: 1. This parameter is characterized and is not 100% tested. Functional Description The ACE93C46 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. Instruction Set for the ACE93C46 Instruction SB Address OP Code *8 *16 Data *8 *16 Comments Read data stored in memory, at specified address Write enable must precede all programming modes READ 1 10 A6-A0 A5-A0 EWEN 1 00 11XXXXX 11XXXX REASE 1 11 A6-A0 A5-A0 WRITE 1 01 A6-A0 A5-A0 ERAL 1 00 10XXXXX 10XXXX WRAL 1 00 01XXXXX 01XXXX D7-D0 D15-D0 EWDS 1 00 00XXXXX 00XXXX Erase memory location An-A0 D7-D0 D15-D0 Writes memory location An-A0 Erases all memory locations. Valid only at VCC=4.5V to 5.5V Writes all memory locations. Valid only at VCC=4.5V to 5.5V Disables all programming instructions Notes: The X’s in the address field represent don’t care values and must be clocked. VER 1.4 5 ACE93C46 Three-wire Serial EEPROM 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 8- or 16-bit data output string. ERASE/WRITE (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 8 or 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 status of the part if CS is brought high after being kept low for a minimum of 250ns (TCS). The WRAL instruction is valid only at VCC = 5.0V ± 10%. VER 1.4 6 ACE93C46 Three-wire Serial EEPROM 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 Note: This is the minimum SK period. Figure 1: Synchronous Data Timing Organization Key for Timing Diagrams I/O ACE93C46 (1K) *16 *8 AN A5 A6 DN D15 D7 Figure 2: Read Timing VER 1.4 7 ACE93C46 Three-wire Serial EEPROM Figure 3: EWEN Timing Figure 4: EWDS Timing Figure 5: WRITE Timing Note: Valid only at VCC=4.5V to 5.5V Figure 6: WRAL Timing (1) VER 1.4 8 ACE93C46 Three-wire Serial EEPROM Figure 7: ERASE Timing Note: Valid only at VCC=4.5V to 5.5V Figure 8: ERAL Timing (1) VER 1.4 9 ACE93C46 Three-wire Serial EEPROM Packaging information DIP-8 Note: Dimensions in Millimeters. VER 1.4 10 ACE93C46 Three-wire Serial EEPROM Packaging information SOP-8 Note: Dimensions in Millimeters. VER 1.4 11 ACE93C46 Three-wire Serial EEPROM Packaging information TSSOP-8 Note: Dimensions in Millimeters. VER 1.4 12 ACE93C46 Three-wire Serial EEPROM Notes ACE does not assume any responsibility for use as critical components in life support devices or systems without the express written approval of the president and general counsel of ACE Electronics Co., LTD. As sued herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and shoes failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ACE Technology Co., LTD. http://www.ace-ele.com/ VER 1.4 13