AT27C520-70SI

Features • 8-Bit Multiplexed Addresses/Outputs • Fast Read Access Time - 70 ns • Low Power CMOS Operation • • • • • • • • • – 20 mA max. Active at 5 MHz 20-Lead TSSOP Package 20-Lead SOIC Package 28-Lead TSOP Package 5V ± 10% Supply High Reliability CMOS Technology – 2,000V ESD Protection – 200 mA Latchup Immunity Rapid™ Programming Algorithm - 50 µs/byte (typical) CMOS and TTL Compatible Inputs and Outputs Integrated Product Identification Code Commercial and Industrial Temperature Range Description The AT27C520 is a low-power, high performance 524,288 bit one-time programmable read only memory (OTP EPROM) organized 64K by 8 bits. It incorporates latches for the 8 lower order address bits to multiplex with the 8 data bits. This minimizes system chip count, reduces cost, and simplifies the design of multiplexed bus systems. It requires only one 5V power supply in normal read mode operation. Any byte can be accessed in less than 70 ns, eliminating the need for speed reducing WAIT states on high performance microprocessor systems. Atmel’s scaled CMOS technology provides high speed, lower active power consumption, and significantly faster programming. Power consumption is typically only 8 mA in Active Mode. The AT27C520 is available in 173 mil, 20-pin TSSOP; 300 mil, 20-pin SOIC; and 28pin TSOP, one-time programmable (OTP) plastic packages. (continued) 512K (64K x 8) Multiplexed Addresses/ Outputs OTP EPROM AT27C520 Pin Configurations Pin Name A8 - A15 AD0 - AD7 OE /VPP ALE Function Addresses Addresses/Outputs Output Enable/VPP Address Latch Enable TSOP Top View A10 NC NC A12 A14 ALE VCC OE/VPP A15 A13 A11 NC NC A9 22 23 24 25 26 27 28 1 2 3 4 5 6 7 21 20 19 18 17 16 15 14 13 12 11 10 9 8 A8 NC NC AD1 AD3 AD5 AD7 GND AD6 AD4 AD2 NC NC AD0 TSSOP Top View A10 A12 A14 ALE VCC OE/VPP A15 A13 A11 A9 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 A8 AD1 AD3 AD5 AD7 GND AD6 AD4 AD2 AD0 SOIC Top View OE/VPP A15 A13 A11 A9 AD0 AD2 AD4 AD6 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC ALE A14 A12 A10 A8 AD1 AD3 AD5 AD7 Rev. 0752C-C–01/98 1 With 64K byte storage capability, the AT27C520 allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media. Atmel's 27C520 has additional features to ensure high quality and efficient production use. The Rapid™ Programming Algorithm reduces the time required to program the part and guarantees reliable programming. Programming time is typically only 50 µs/byte. The Integrated Product Identification Code electronically identifies the device and manufacturer. This feature is used by industry standard programming equipment to select the proper programming algorithms and voltages. System Considerations Switching under active conditions may produce transient voltage excursions. Unless accommodated by the system design, these transients may exceed data sheet limits, resulting in device non-conformance. At a minimum, a 0.1 µ F high frequency, low inherent inductance, ceramic capacitor should be utilized for each device. This capacitor should be connected between the VCC and Ground terminals of the device, as close to the device as possible. Additionally, to stabilize the supply voltage level on printed circuit boards with large EPROM arrays, a 4.7 µF bulk electrolytic capacitor should be utilized, again connected between the V CC a nd Ground terminals. This capacitor should be positioned as close as possible to the point where the power supply is connected to the array. Block Diagram VCC GND OE/VPP ALE OE, ALE, AND PROGRAM LOGIC OUTPUT BUFFERS 8 LATCHES Y DECODER Y-GATING AD7 - AD0 A15 - A8 8 X DECODER CELL MATRIX IDENTIFICATION 2 AT27C520 AT27C520 Absolute Maximum Ratings* Temperature Under Bias ................................ -55°C to +125°C Storage Temperature ..................................... -65°C to +150°C Voltage on Any Pin with Respect to Ground .........................................-2.0V to +7.0V(1) Voltage on A9 with Respect to Ground ......................................-2.0V to +14.0V(1) Note: VPP Supply Voltage with Respect to Ground .......................................-2.0V to +14.0V(1) 1. *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. Minimum voltage is -0.6V DC which may undershoot to -2.0V for pulses of less than 20 ns. Maximum output pin voltage is VCC + 0.75V DC which may overshoot to +7.0V for pulses of less than 20 ns. Operating Modes Mode/Pin Read Output Disable Address Latch Enable Rapid Program (2) ALE VIL VIL/VIH VIH VIH (3) OE/VPP VIL VIH VIH VPP VIL A8 - A15 Ai X (1) AD0 - AD7 DOUT High Z/A0 - A7 A0 - A7 DIN Identification Code X Ai A9 = VH(4) A8 = VIH or VIL A10 - A15 = VIL Product Identification Notes: VIL 1. X can be VIL or VIH. 2. Refer to Programming Characteristics. 3. VH = 12.0 ± 0.5V. 4. Two identifier bytes may be selected. All A8 - A15 inputs are held low (VIL), except A9 which is set to VH and A8 which is toggled low (VIL) to select the Manufacturer’s Identification byte and high (VIH) to select the Device Code byte. 3 DC and AC Operating Conditions for Read Operation AT27C520 -70 Operating Temp.(Case) VCC Supply Com. Ind. 0°C - 70°C -40°C - 85°C 5V ± 10% -90 0°C - 70°C -40°C - 85°C 5V ± 10% DC and Operating Characteristics for Read Operation Symbol ILI ILI2 ILO ICC VIL VIH VOL VOH Note: (1) Parameter Input Load Current Input Load Current A13 Output Leakage Current VCC Active Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage Condition VIN = 0V to VCC VIN = 0V to VCC VOUT = 0V to VCC f = 5 MHz, IOUT = 0 mA Min Max ±1 ±100 ±5 20 Units µA µA µA mA V V V V -0.6 2.0 IOL = 2.1 mA IOH = -400 µA 2.4 0.8 VCC + 0.5 0.4 1. For address input A13 only. AC Characteristics for Read Operation AT27C520 -70 Symbol tACC(2) tAS tAH tALE tOE(2) tDF(3)(4) tOH Notes: Parameter Address to Output Delay Address Setup Time Address Hold Time Address Latch Enable Width OE/VPP to Output Delay OE/VPP High to Output Float Output Hold from Address or OE/VPP , whichever occurred first Condition ALE = OE/VPP = VIL OE/VPP = VIH OE/VPP = VIH OE/VPP = VIH ALE = VIL ALE = VIL ALE = VIL 7 12 12 40 30 25 0 Min Max Min -90 Max Units ns ns ns ns 70 15 15 45 90 35 25 ns ns ns 1. 2, 3, 4 — see AC Waveforms for Read Operation 4 AT27C520 AT27C520 AC Waveforms for Read Operation(1) tALE ALE OE/VPP tDF tAS AD7 - AD0 ADDRESS IN tACC A15 - A8 Notes: 1. 2. 3. 4. Timing measurement reference levels for all speed grades are VOL = 0.8V and VOH = 2.0V. Input AC drive levels are VIL = 0.45V and VIH = 2.4V. OE/VPP may be delayed up to tACC - tOE after the address is valid without impact on tACC. This parameter is only sampled and is not 100% tested. Output float is defined as the point when data is no longer driven. tAH tOE tOH DATA OUT Input Test Waveforms and Measurement Levels For -70 and -90 devices: Output Test Load tR, tF < 20 ns (10% to 90%) Note: CL = 100 pF including jig capacitance. Pin Capacitance (f = 1 MHz, T = 25°C)(1) Typ CIN COUT Note: Max 6 12 Units pF pF Conditions VIN = 0V VOUT = 0V 4 8 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested. 5 Programming Waveforms PROGRAM VCC 6.5V 5.0V tVCS 13V OE/VPP VIH VIL tPRT ALE VIH VIL tLP tALE tLAS ADDR tAS A15 - A8 VIH VIL ADDRESS STABLE tLAH tPW tDS DATA IN tDH tALE tOE AD7 - AD0 VIH VIL tLAS ADDR tLAH DATA OUT tAH tDFP tOES tOEH tVR READ (VERIFY) Notes: 1. 2. The Input Timing Reference is 0.8V for VIL and 2.0V for VIH. tOE and tDFP are characteristics of the device but must be accommodated by the programmer. DC Programming Characteristics TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, OE/VPP = 13.0 ± 0.25V Limits Symbol ILI ILI2 (1) Parameter Input Load Current Input Load Current A13 Input Low Level Input High Level Output Low Voltage Output High Voltage VCC Supply Current (Program and Verify) OE/VPP Current Test Conditions VIN = VIL, VIH VIN = VIL, VIH Min Max ±10 ±100 Units µA µA V V V V VIL VIH VOL VOH ICC2 IPP2 Note: -0.6 2.0 IOL = 2.1 mA IOH = -400 µA 2.4 0.8 VCC + 1.0 0.4 25 ALE = VIH 25 mA mA 1. For address input A13 only. 6 AT27C520 AT27C520 AC Programming Characteristics TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, OE/VPP = 13.0 ± 0.25V Limits Symbol tALE tLAS tLAH tLP tOES tOEH tDS tDH tPW tVR tVCS tOE tDFP tAS tAH tPRT Notes: Parameter (1) Test Conditions Min 500 100 100 2 Max Units ns ns ns µs µs µs µs µs µs µs µs Address Latch Enable Width Latched Address Setup Time Latched Address Hold Time ALE Low to OE/VPP High Voltage Delay OE/VPP Setup Time OE/VPP Hold Time Data Setup Time Data Hold Time ALE Program Pulse Width(2) OE/VPP Recovery Time VCC Setup Time Data Valid from OE/VPP OE/VPP High to Output Float Delay(3) Address Setup Time Address Hold Time OE/VPP Pulse Rise Time During Programming Input Rise and Fall Times (10% to 90%) 20 ns Input Pulse Levels 0.45V to 2.4V Input Timing Reference Level 0.8V to 2.0V Output Timing Reference Level 0.8V to 2.0V 2 2 2 2 47.5 2 2 150 0 2 0 50 130 52.5 ns ns µs µs ns 1. VCC must be applied simultaneously or before OE/VPP and removed simultaneously or after OE/VPP . 2. Program Pulse width tolerance is 50 µsec ± 5%. 3. This parameter is only sampled and is not 100% tested. Output Float is defined as the point where data is no longer driven — see timing diagram. Atmel’s 27C520 Integrated Product Identification Code Pins Codes Manufacturer Device Type A8 0 1 AD7 0 1 AD6 0 0 AD5 0 0 AD4 1 1 AD3 1 1 AD2 1 1 AD1 1 0 AD0 0 1 Hex Data 1E 9D 7 Rapid™ Programming Algorithm A 50 µs ALE pulse width is used to program. The address is set to the first location. VCC is raised to 6.5V and OE/VPP is raised to 13.0V. Each address is first programmed with one 50 µs ALE pulse without verification. Then a verification/reprogramming loop is executed for each address. In the event a byte fails to pass verification, up to 10 successive 50 µs pulses are applied with a verification after each pulse. If the byte fails to verify after 10 pulses have been applied, the part is considered failed. After the byte verifies properly, the next address is selected until all have been checked. OE/VPP is then lowered to VIH and VCC to 5.0V. All bytes are read again and compared with the original data to determine if the device passes or fails. START ADDR = FIRST LOCATION VCC = 6.5V VPP = 13.0V PROGRAM ONE 50 µS PULSE INCREMENT ADDRESS NO LAST ADDR.? YES ADDR = FIRST LOCATION INCREMENT ADDRESS NO LAST ADDR.? YES PROGRAM ONE 100 µS PULSE NO X = 10? PASS VERIFY BYTE FAIL INCREMENT X X=0 YES VCC = 5.0V VPP = 5.0V COMPARE ALL BYTES TO ORIGINAL DATA FAIL DEVICE FAILED PASS DEVICE PASSED 8 AT27C520 AT27C520 Ordering Information tACC (ns) 70 ICC (mA) Active 20 Ordering Code AT27C520-70SC AT27C520-70TC AT27C520-70XC AT27C520-70SI AT27C520-70TI AT27C520-70XI 90 20 AT27C520-90SC AT27C520-90TC AT27C520-90XC AT27C520-90SI AT27C520-90TI AT27C520-90XI Package 20S 28T 20X 20S 28T 20X 20S 28T 20X 20S 28T 20X Operation Range Commercial (0°C to 70°C) Industrial (-40°C to 85°C) Commercial (0°C to 70°C) Industrial (-40°C to 85°C) Package Type 20S 28T 20X 20-Lead, 0.300” Wide, Plastic Gull-Wing Small Outline (SOIC) 28-Lead, Thin Small Outline Package (TSOP) 20-Lead, 0.173” Wide, Thin Shrink Small Outline (TSSOP) 9 Packaging Information 20S, 20-Lead, 0.300” Wide, Plastic Gull Wing Small Outline Dimensions in Inches and (Millimeters) 28T, 28-Lead, Plastic Thin Small Outline Package (TSOP) Dimensions in Millimeters and (Inches) .020(.508) .013(.330) .299(7.60) .420(10.7) .291(7.39) .393(9.98) PIN 1 ID .050(1.27) BSC .513(13.0) .497(12.6) .105(2.67) .092(2.34) .012(.305) .003(.076) .013(.330) .009(.229) 0 REF 8 .035(0.889) .015(.381) 20X, 20-Lead, 0.173” Wide, Thin Super Small Outline Package (TSSOP) Dimensions in (Millimeters) and Inches 0.30(0.012) 0.18(0.007) 4.48(.176) 6.50(.256) 4.30(.169) 6.25(.246) PIN 1 ID 0.65(.0256) BSC 6.60(.260) 6.40(.252) 1.10(0.043) MAX 0.15(.006) 0.05(.002) 0.18(.007) 0.09(.003) 0 REF 8 0.70(.028) 0.50(.020) 10 AT27C520