A278308A 256K X 8 OTP CMOS EPROM Document Title 256K X 8 OTP CMOS EPROM Revision History History Issue Date Remark 0.0 Initial issue September 29, 2000 Preliminary 0.1 Change Program Verify VCC to 6.25V March 14, 2001 1.0 Final version release October 7, 2003 Rev. No. (October, 2003, Version 1.0) Final AMIC Technology, Corp. A278308A 256K X 8 OTP CMOS EPROM Features All inputs and outputs are directly TTL-compatible Available in 32-pin DIP and 32-pin PLCC packages 262,144 X 8 bit organization Programming voltage: 12.75V Access time: 55/70 ns (max.) Current: Operating: 30mA (max.) at 5MHz Standby: 100µA (max.) General Description input signals are TTL levels. The A278308A is available in industry standard 32 pin dual-in-line and 32 pin PLCC packages. The A278308A chip is a high-performance 2,097,152 bit one-time programmable read only memory (OTP EPROM) organized as 256K by 8 bits. The A278308A requires only 5V power supply in normal read mode operation and any Pin Configurations 28 A13 25 A11 A11 A3 9 24 OE A2 10 24 OE 23 A10 A1 11 23 A10 22 CE A0 12 22 CE I/O0 13 21 I/O7 I/O0 13 20 I/O6 I/O1 14 19 I/O5 I/O2 15 18 I/O4 GND 16 17 I/O3 1 20 21 I/O6 12 A278308AL 19 A0 I/O7 (October, 2003, Version 1.0) A9 25 I/O5 11 26 18 A1 8 A9 17 10 A8 A4 26 I/O3 A2 27 I/O4 9 7 A8 16 A3 A13 A5 27 GND 8 A14 28 15 A4 29 6 14 7 5 A6 I/O2 A5 A7 I/O1 6 A278308A A6 A17 5 PGM A14 A7 30 29 31 4 VCC A17 A12 VPP 30 1 3 32 PGM A15 A16 VCC 31 A15 32 2 2 1 A16 3 VPP A12 PLCC 4 DIP AMIC Technology, Corp. A278308A Pin Configurations Pin Name Function A0-A17 Address Inputs I/O7-I/O0 Data Inputs / Outputs CE Chip Enable OE Output Enable PGM Program Strobe VPP Program Power Supply VCC Power Supply GND Ground Operating Modes and Truth Table CE OE PGM A0 A1 A9 VPP VCC I/O7-I/O0 Read VIL VIL X X X X VCC VCC Data Out Output Disable VIL VIH X X X X VCC VCC Hi-Z Standby VIH X X X X X VCC VCC Hi-Z Program VIL VIH VIL Pulse X X X 12.75V 6.25V Data In Program Verify VIL VIL VIH X X X 12.75V 6.25V Data Out Program Inhibit VIH X X X X X 12.75V 6.25V Hi-Z Manufacturer Code(3) VIL VIL VIH VIL VIL VID VCC VCC 37H Device Code(3) VIL VIL VIH VIH VIL VID VCC VCC 64H Continuation Code(3) VIL VIL VIH VIL VIH VID VCC VCC 7FH Mode Notes: 1. X = Either VIH or VIL. 2. VID = 12V ± 0.5V. 3. A2 ~ A8 = A10 ~ A17 = VIL (For auto identification) (October, 2003, Version 1.0) 2 AMIC Technology, Corp. A278308A Functional Description Read Mode Auto Identify Mode The A278308A has two control functions, both of which must be logically active in order to obtain data at the outputs. CE is the power control and should be used for device selection. OE is the output control and should be used to data to the output pins, which is independent of device selection. Assuming that addresses are stable, address access time (tAA) is equal to the delay from CE to output (tCE). Data is available at the output after a delay (tOE) from the falling edge of OE , as long as CE has been low and the addresses have been stable for at least tACC - tOE. The auto identify mode allows the reading out of a binary code from a EPROM that will identify its manufacturer and type. This mode is intended for use by programming equipment for the purpose of automatically matching the device to be programmed with its corresponding programming algorithm. To activate the mode, the programming equipment must apply 12.0V ± 0.5V on address line A9 of the A278308A. Three identification code can be read from data output pin by toggling A0 and A1. The other addresses must be held at VIL during this mode. Byte 0 (with A0 at VIL, A1 at VIL) represents the manufacturer code which is 37H. Byte 1 and Byte 2 represent the device code and continuation code, which is 64H and 7FH respectively. All identifiers for these codes will possess odd parity, with MSB (IO7) defined the parity bit. Standby Mode The A278308A has a standby mode which reduces the active current from 30mA to 100µA. The A278308A is placed in the standby mode by applying a CMOS high signal to CE . When in the standby mode, the output are in a high impedance state, independent of the OE . Absolute Maximum Ratings* *Comments Ambient Operating Temperature (TA) . . . -10°C to +85°C Storage Temperature Plastic Package (TSTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55°C to 125°C Applied Input Voltage (VI): All Pins Except A9, VPP and VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.6V to VCC + 0.6V A9, VPP . . . . . . . . . . . . . . . . . . . . . . . -0.6V to 13.5V VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to 7.0V Output Voltage (VO) . . . . . . . . . . . -0.6V to 7.0V (Note 1) 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. Notes: 1. During voltage transitions, the input may undershoot GND to -2.0V for periods less than 20 ns. Maximum DC voltage on input and I/O may overshoot to VCC + 2.0V for periods less than 20 ns. 2. When transitions, A9 and VPP may undershoot GND to -2.0V for periods less than 20 ns. Maximum DC input voltage on A9 and VPP is +13.5V which may overshoot to 14.0V for period less than 20 ns. (October, 2003, Version 1.0) 3 AMIC Technology, Corp. A278308A Read Mode DC Electrical Characteristics (Ta = 0°C to 70°C, VCC = 5V ± 10%, VPP = VCC) Symbol Parameter Min. Max. Unit Conditions V IOH = -400µA 0.4 V IOL = 2.1mA 2.0 VCC + 0.5 V -0.5 0.8 V Input Leakage Current -1 +1 µA VCC = max. Vin = 0V to VCC ILO Output Leakage Current -1 +1 µA VCC = max. Vout = 0V to VCC ICC VCC Read Operating Current 30 mA VCC = max. CE = VIL, OE = VIL Iout = 0mA, at 5MHz ISB VCC Standby Current (TTL) 1 mA VCC = max. CE = VIH ISB1 VCC Standby Current (CMOS) 100 µA VCC = max. CE = VCC - 0.2V IPP VPP Current During Read 10 µA CE = OE = VIL, VPP = VCC IID A9 Auto Select Current 100 µA A9 = VID, VCC = max. VOH Output High Voltage VOL Output Low Voltage VIH Input High Voltage VIL Input Low Voltage ILI 2.4 Capacitance (TA = 25°C, f = 1.0MHz) Symbol Parameter Min. Max. Unit Conditions CIN Input Capacitance 8 pF VIN = 0V COut Output Capacitance 8 pF VOut = 0V * These parameters are sampled and not 100% tested. (October, 2003, Version 1.0) 4 AMIC Technology, Corp. A278308A Read Mode AC Characteristics (Ta = 0°C to 70°C, VCC = 5V ± 10%, VPP = VCC) Symbol 55ns Parameter Min. 70ns Max. 55 Min. Unit Max. tCYC Cycle Time 70 tAA Address Access Time 55 70 ns tCE Chip Enable Access Time 55 70 ns tOE Output Enable Access Time 30 35 ns tOH Output Hold after Address, CE or OE , whichever Occurred First tHZ Output High Z Delay 0 ns 0 ns 20 20 ns Read Mode Switching Waveforms tCYC ADDRESS Address Valid CE tCE OE tHZ tOE tOH tAA Valid Output OUTPUT (October, 2003, Version 1.0) 5 High-Z AMIC Technology, Corp. A278308A AC Measurement Conditions for 55 ns Input Rise and Fall Times ≤ 10 ns Input Pulse Voltage: 0V to 3Volt Input and Output Timing Ref. Voltage: 1.5Volt 3.0V 1.5V TEST POINTS 1.5V 0V INPUT for 70 ns OUTPUT Input Rise and Fall Times ≤ 10 ns Input Pulse Voltage: 0.4V to 2.4Volt Input and Output Timing Ref. Voltage: 0.8V to 2.0Volt 2.4V 2.0V 0.8V TEST POINTS 2.0V 0.8V 0.4V INPUT OUTPUT AC Testing Load Circuit 1.3V 1N914 3.3KΩ OUT DEVICE UNDER TEST CL = 30pF or 100pF CL = 30pF for 55 ns CL = 100pF for 70/90 ns CL includes JIG capacitance (October, 2003, Version 1.0) 6 AMIC Technology, Corp. A278308A Programming and Program Verify additional pulse programming is applied for a maximum of 25 pulses. On completion of 1 byte programming and, The verified address is incremented. After the final address is completed, all bytes are verified again with VCC = 5.0 Volt. The programming flowchart is shown in Page 10. The A278308A is shipped with all bits being set to "1". Programming causes relevant bits to be changed to "0". The programming mode is started by setting VCC to +6.25V and VPP to +12.75V, while CE and PGM are at VIL, and OE is at VIH. Data to be programmed can be directly input in the 8 bit format through the data bus. Program Inhibit This mode is used to program one of multiple A278308A whose OE , PGM , VPP, VCC, address bus and data bus are connected in parallel. When programming is performed, other A278308A can be inhibited from being programmed by setting their CE pins to VIH. The write programming algorithm reduces programming time by using 100µs pulse followed by a byte verification to determine whether the byte has been successfully programmed. If the data does not pass the verification, an Programming Mode DC Characteristics (Ta = 0°C to 70°C, VCC = 6.25V ± 0.25V, VPP = 12.75V ± 0.25V) Symbol Parameter Min. Max. Unit Test Conditions V IOH = -400µA 0.4 V IOL = 2.1mA 2.0 VCC + 0.5 V -0.5 0.8 V -1 +1 µA VCC Current During Program 50 mA IPP VPP Current During Program 50 mA VID A9 Auto Select Voltage 11.5 12.5 V VCC1 Programming Supply Voltage 6.0 6.5 V VPP1 Programming Voltage 12.5 13 V VOH Output High Voltage VOL Output Low Voltage VIH Input High Voltage VIL Input Low Voltage ILI Input Leakage Current ICC 2.4 VCC = max. Vin = 0V to VCC CE = VIL A9 = VID Note: VCC must be applied simultaneously or before VPP and removed simultaneously or after VPP. (October, 2003, Version 1.0) 7 AMIC Technology, Corp. A278308A Programming Mode AC Characteristics (Ta = 0°C to 70°C, VCC= 6.25V ± 0.25V, VPP = 12.75V ± 0.25V) Symbol Parameter Min. Max. Unit tAS Address Valid to Program Low 2 µs tDS Input Valid to Program Low 2 µs tVPS VPP High to Program Low 2 µs tVCS VCC High to Program Low 2 µs tCES CE Low to Program Low 2 µs tPW Program Pulse Width 95 tDH Program High to Input transition 2 µs tOES Input Transition to OE Low 2 µs tOE OE Low to Output Valid 100 ns tOHZ OE High to Output Hi-Z 130 ns tAH OE High to Address Transition (October, 2003, Version 1.0) 0 8 105 µs ns AMIC Technology, Corp. A278308A Programming and Verify Mode AC Waveforms PROGRAM VERIFY PROGRAM VIH ADDRESS VALID VIL tAS DATA DATA IN tDS DATA OUT tDH VPP1 VPP VCC tVPS tOE tOHZ VCC1 VCC VCC tVCS tAH VIH CE VIL tCES tPW VIH PGM VIL tOES VIH OE (October, 2003, Version 1.0) VIL 9 AMIC Technology, Corp. A278308A Programming Flowchart START ADDRESS=FIRST LOCATION VCC=6.25V VPP=12.75V INTERACTIVE SECTION X=0 PROGRAM ONE 100 s PULSE INCREMENT X YES X = 25? NO FAIL VERIFY BYTE VERIFY BYTE FAIL PASS PASS INCREMENT ADDRESS NO LAST ADDRESS YES VCC=VPP=5.0V VERIFY SECTION VERIFY ALL BYTES ? FAIL DEVICE FAILED PASS DEVICE PASSED (October, 2003, Version 1.0) 10 AMIC Technology, Corp. A278308A Ordering Information Access Time (ns) Operating Current Max. (mA) at 5MHz Standby Current Max. (µA) Package A278308A-55 55 30 100 32Pin DIP A278308AL-55 55 30 100 32Pin PLCC A278308A-70 70 30 100 32Pin DIP A278308AL-70 70 30 100 32Pin PLCC Part No. (October, 2003, Version 1.0) 11 AMIC Technology, Corp. A278308A Package Information P-DIP 32L Outline Dimensions unit: inches/mm D 17 1 16 E 32 A1 A2 Base Plane Seating Plane L A C E1 B Symbol θ e B1 Dimensions in inches EA Dimensions in mm Min Nom Max Min Nom Max A - - 0.210 - - 5.334 A1 0.015 - - 0.381 - - A2 0.149 0.154 0.159 3.785 3.912 4.039 B - 0.018 - - 0.457 - B1 - 0.050 - - 1.270 - C D 1.645 0.010 1.650 1.655 41.783 0.254 41.91 42.037 E 0.537 0.542 0.547 13.64 13.767 13.894 E1 0.590 0.600 0.610 14.986 15.240 15.494 EA 0.630 0.650 0.670 16.002 16.510 17.018 e - 0.100 - - 2.540 - L 0.120 0.130 0.140 3.048 3.302 3.556 θ 0° - 15° 0° - 15° Notes: 1. The maximum value of dimension D includes end flash. 2. Dimension E does not include resin fins. (October, 2003, Version 1.0) 12 AMIC Technology, Corp. A278308A Package Information PLCC 32L Outline Dimension unit: inches/mm HD D 13 5 4 E 1 HE 14 32 20 30 29 c A1 b e L A A2 21 b1 D GE GD y θ Dimensions in inches Dimensions in mm Symbol Min Nom Max Min Nom Max A - - 0.134 - - 3.40 A1 0.0185 - - 0.47 - - A2 0.105 0.110 0.115 2.67 2.80 2.93 b1 0.026 0.028 0.032 0.66 0.71 0.81 0.54 b 0.016 0.018 0.021 0.41 0.46 C 0.008 0.010 0.014 0.20 0.254 0.35 D 0.547 0.550 0.553 13.89 13.97 14.05 E 0.447 0.450 0.453 11.35 11.43 11.51 e 0.044 0.050 0.056 1.12 1.27 1.42 13.46 GD 0.490 0.510 0.530 12.45 12.95 GE 0.390 0.410 0.430 9.91 10.41 10.92 HD 0.585 0.590 0.595 14.86 14.99 15.11 12.57 HE 0.485 0.490 0.495 12.32 12.45 L 0.075 0.090 0.095 1.91 2.29 2.41 y - - 0.003 - - 0.075 θ 0° - 10° 0° - 10° Notes: 1. Dimensions D and E do not include resin fins. 2. Dimensions GD & GE are for PC Board surface mount pad pitch design reference only. (October, 2003, Version 1.0) 13 AMIC Technology, Corp.