AT27BV020_14 ATMEL | Alldatasheet
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Fast read access time – 90ns Dual voltage range operation – Unregulated battery power supply range, 2.7V to 3.6V, or – Standard power supply range, 5V 10% Compatible with JEDEC standard Atmel® AT27C020 Low-power CMOS operation – 20µA max standby (less than 1µA, typical) for VCC = 3.6V – 29mW max active at 5MHz for VCC = 3.6V JEDEC standard packages – 32-lead PLCC – 32-lead TSOP High-reliability CMOS technology – 2,000V ESD protection – 200mA latchup Immunity Rapid programming algorithm – 100µs/byte (typical) CMOS- and TTL-compatible inputs and outputs – JEDEC standard for LVTTL and LVBO Integrated product identification code Industrial temperature range Green (Pb/halide-free) packaging option 1. Description The Atmel AT27BV020 is a high-performance, low-power, low-voltage, 2,097,152-bit, one-time programmable- read-only memory (OTP EPROM) organized as 256K by 8 bits. It requires only one supply in the range of 2.7 to 3.6V in normal read mode operation, making it ideal for fast, portable systems using either regulated or unregulated battery power. The Atmel innovative design techniques provide fast speeds that rival 5V parts, while keep- ing the low power consumption of a 3V supply. At V CC = 2.7V, any byte can be accessed in less than 90ns. With a typical power dissipation of only 18mW at 5MHz and VCC = 3V, the AT27BV020 consumes less than one-fifth the power of a standard, 5V EPROM. Standby mode supply current is typically less than 1µA at 3V. The AT27BV020 simplifies system design and stretches battery lifetime even further by eliminating the need for power supply regulation The AT27BV020 is available in industry-standard, JEDEC-approved, one-time programma- ble (OTP) PLCC and plastic TSOP packages. All devices feature two-line control ( CE, OE) to give designers the flexibility to prevent bus contention. The AT27BV020 operating with VCC at 3.0V produces TTL-level outputs that are compatible with standard TTL logic devices operating at VCC = 5.0V. At VCC = 2.7V, the part is compati- ble with JEDEC-approved, low-voltage battery operation (LVBO) interface specifications. The device is also capable of standard, 5V operation, making it ideally suited for dual supply range systems or card products that are pluggable in both 3V and 5V hosts. The Atmel AT27BV020 has additional features to ensure high quality and efficient produc- tion use. The rapid programming algorithm reduces the time required to program the part 2Mb (256K x 8) Unregulated Battery Voltage, High-speed, One-time Programmable, Read-only Memory Atmel AT27BV020 Not recommended for new designs 0902G–EPROM–4/11
0902G–EPROM–4/11 Atmel AT27BV020 and guarantees reliable programming. Programming time is typically only 100 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. The AT27BV020 programs in exactly the same way as a standard, 5V Atmel AT27C020, and uses the same programming equipment. 2. Pin configurations 3. System considerations Switching between active and standby conditions via the chip enable pin may produce transient voltage excursions. Unless accommodated by the system design, these transients may exceed datasheet limits, resulting in device nonconformance. At a minimum, a 0.1µF, high-frequency, low inherent inductance, ceramic capacitor should be utilized for each device. This capacitor should be connected between the V CC 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 4.7µF bulk electrolytic capacitor should be utilized, again connected between the VCC and ground terminals. This capacitor should be positioned as close as possible to the point where the power supply is connected to the array. Figure 3-1. Block diagram Pin name Function A0 - A17 Addresses O0 - O7 Outputs CE Chip enable OE Output enable PGM Program strobe NC No connect A A A C P VCC VPP A A A A A O C O O O O A A14 A13 A11 OE A10 CE GND A12 A15 A16 VPP VCC PGM NC 32-lead TSOP Top view 32-lead PLCC Top view
0902G–EPROM–4/11 Atmel AT27BV020 4. Absolute maximum ratings* Note: 1. Minimum voltage is -0.6V DC, which may undershoot to -2.0V for pulses of less than 20ns. Maximum output pin voltage is VCC + 0.75V DC, which may be exceeded if certain precautions are observed (consult application notes), and which may overshoot to +7.0V for pulses of less than 20ns. 5. AC and DC charcteristics Table 5-1. Operating modes Notes: 1. X Can be V IL or VIH. 3. Refer to programming characteristics. Programming modes requires V CC = 6.5V. 5. Two identifier bytes may be selected. All Ai inputs are held low (V IL) except A9, which is set to VH, and A0, which is tog- gled low (VIL) to select the manufacturer’s identification byte and high (VIH) to select the device code byte. Table 5-2. DC and AC operating conditions for read operation 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. Voltage on any pin with (1) Voltage on A9 with (1) VPP supply voltage with Mode/Pin CE OE PGM Ai V PP VCC Outputs Read(2) VIL VIL X(1) Ai X V CC DOUT Output disable(2) X V IH XXX V CC High-Z Standby(2) VIH XX X X V CC High-Z Rapid program(3) VIL VIH VIL Ai V PP VCC DIN PGM verify(3) VIL VIL VIH Ai V PP VCC DOUT PGM inhibit(3) VIH XX X V PP VCC High-Z Product identification(3)(5) VIL VIL X A9 = VH (4) A0 = VIH or VIL A1 - A17 = VIL XV CC Identification code Atmel AT27BV020-90 Industrial operating temperature (case) -40°C - 85°C VCC power supply 2.7V to 3.6V 5V ± 10%
0902G–EPROM–4/11 Atmel AT27BV020 Table 5-3. DC and operating charcteristics for read operation Notes: 1. V CC must be applied simultaneously with or before VPP, and removed simultaneously with or after VPP. 2. V PP may be connected directly to VCC, expect during programming. The supply current would then be the sum of ICC and IPP. Symbol Parameter Condition Min Max Units VCC = 2.7V to 3.6V ILI Input load current V IN = 0V to VCC 1µ A ILO Output leakage current V OUT = 0V to VCC 5µ A IPP1 (2) VPP (1) read/standby current V PP = VCC 10 µA ISB VCC (1) standby current ISB1 (CMOS), CE = VCC± 0.3V 20 µA ISB2 (TTL), CE = 2.0 to VCC + 0.5V 100 µA ICC VCC active current f = 5MHz, I OUT = 0mA, CE = VIL, VCC = 3.6V 8 mA VIL Input low voltage VCC = 3.0 to 3.6V -0.6 0.8 V VCC = 2.7 to 3.6V -0.6 0.2 x V CC V VIH Input high voltage VCC = 3.0 to 3.6V 2.0 V CC + 0.5 V VCC = 2.7 to 3.6V 0.7 x V CC VCC + 0.5 V VOL Output low voltage IOL = 2.0mA 0.4 V IOL = 100µA 0.2 V IOL = 20µA 0.1 V VOH Output high voltage IOH = -2.0mA 2.4 V IOH = -100µA V CC - 0.2 V IOH = -20µA V CC - 0.1 V VCC = 4.5V to 5.5V ILI Input load current V IN = 0V to VCC 1µ A ILO Output leakage current V OUT = 0V to VCC 5µ A IPP1 (2) VPP (1) read/standby current V PP = VCC 10 µA ISB VCC (1) standby current ISB1 (CMOS), CE = VCC 0.3V 100 µA ISB2 (TTL), CE = 2.0 to VCC + 0.5V 1 mA ICC VCC active current f = 5MHz, I OUT = 0mA, CE = VIL 25 mA VIL Input low voltage -0.6 0.8 V VIH Input high voltage 2.0 V CC + 0.5 V VOL Output low voltage I OL = 2.1mA 0.4 V VOH Output high voltage I OH = -400µA 2.4 V
0902G–EPROM–4/11 Atmel AT27BV020 Table 5-6. DC programming charcteristics Table 5-7. AC programming characteristics Notes: 1. V CC must be applied simultaneously with or before VPP and removed simultaneously with or after VPP. 2. 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. 3. Program pulse width tolerance is 100µsec ± 5%. Table 5-8. The Atmel AT27BV020 integrated product identification code (1) Note: 1. The Atmel AT27BV020 has the same product identification code as the Atmel AT27C020. Both are programming compatible. TA = 25 ± 5° C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V Symbol Parameter Test conditions Limits UnitsMin Max ILI Input load current V IN = VIL,VIH ±10 µA VIL Input low level -0.6 0.8 V VIH Input high level 2.0 V CC + 0.5 V VOL Output low voltage I OL = 2.1 mA 0.4 V VOH Output high voltage I OH = -400µA 2.4 V ICC2 VCC supply current (program and verify) 40 mA IPP2 VPP supply current CE = PGM = VIL 20 mA VID A9 product identification voltage 11.5 12.5 V TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V Symbol Parameter Test conditions (1) Limits UnitsMin Max tAS Address setup time Input rise and fall times: (10% to 90%) 20ns 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 2µ s tCES CE setup time 2 µs tOES OE setup time 2 µs tDS Data setup time 2 µs tAH Address hold time 0 µs tDH Data hold time 2 µs tDFP OE high to output float delay(3) 0 130 ns tVPS VPP setup time 2 µs tVCS VCC setup time 2 µs tPW PGM program pulse width(2) 95 105 µs tOE Data valid from OE 150 ns tPRT VPP pulse rise time during programming 50 ns Codes Pins Hex dataA0 O7 O6 O5 O4 O3 O2 O1 O0 Manufacturer 000011110 1 E Device type 110000110 8 6
0902G–EPROM–4/11 Atmel AT27BV020 6. Rapid programming algorithm A 100µs PGM pulse width is used to program. The address is set to the first location. VCC is raised to 6.5V and VPP is raised to 13.0V. Each address is first programmed with one 100µs PGM 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 100µs 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. V PP is then lowered to 5.0V and VCC to 5.0V. All bytes are read again and compared with the original data to determine if the device passes or fails. Figure 6-1. Rapid programming algorithm
0902G–EPROM–4/11 Atmel AT27BV020 7. Ordering Information Green package option (Pb/halide-free) tACC (ns) ICC (mA) VCC = 3.6V Atmel ordering code Package Operation rangeActive Standby 90 8 0.02 AT27BV020-90JU AT27BV020-90TU 32J 32T Industrial (-40C to 85C) Package type 32J 32-lead, plastic, J-leaded chip carrier (PLCC) 32T 32-lead, plastic, thin, small outline package (TSOP)
0902G–EPROM–4/11 Atmel AT27BV020 8. Packaging information 32J – PLCC DRAWING NO. REV. TITLE 32J, 32-lead, Plastic J-leaded Chip Carrier (PLCC) B32J 10/04/01 1.14(0.045) X 45° PIN NO. 1 IDENTIFIER 1.14(0.045) X 45° 0.51(0.020)MAX 0.318(0.0125) 0.191(0.0075) 45° MAX (3X) A B1 E2 B e E1 E D COMMON DIMENSIONS (Unit of measure = mm) SYMBOL MIN NOM MAX NOTE Package Drawing Contact: packagedrawings@atmel.com Notes: 1. This package conforms to JEDEC reference MS-016, Variation AE. 2. Dimensions D1 and E1 do not include mold protrusion. Allowable protrusion is .010"(0.254mm) per side. Dimension D1 and E1 include mold mismatch and are measured at the extreme material condition at the upper or lower parting line. 3. Lead coplanarity is 0.004" (0.10mm) maximum. A 3.175 – 3.556 A1 1.524 – 2.413 A2 0.381 – – D 12.319 – 12.573 D1 11.354 – 11.506 Note 2 D2 9.906 – 10.922 E 14.859 – 15.113 E1 13.894 – 14.046 Note 2 E2 12.471 – 13.487 B 0.660 – 0.813 B1 0.330 – 0.533 e 1.270 TYP
0902G–EPROM–4/11 Atmel AT27BV020 32T – TSOP TITLE DRAWING NO. REV. 32T, 32-lead (8 x 20mm package) Plastic Thin Small Outline Package, Type I (TSOP) B32T 10/18/01 PIN 1 D1 D Pin 1 Identifier be E A 0º ~ 8º c L GAGE PLANESEATING PLANE COMMON DIMENSIONS (Unit of measure = mm) SYMBOL MIN NOM MAX NOTE Notes: 1. This package conforms to JEDEC reference MO-142, Variation BD. 2. Dimensions D1 and E do not include mold protrusion. Allowable protrusion on E is 0.15mm per side and on D1 is 0.25mm per side. 3. Lead coplanarity is 0.10mm maximum. A – – 1.20 A1 0.05 – 0.15 A2 0.95 1.00 1.05 D 19.80 20.00 20.20 D1 18.30 18.40 18.50 Note 2 E 7.90 8.00 8.10 Note 2 L 0.50 0.60 0.70 L1 0.25 BASIC b 0.17 0.22 0.27 c 0.10 – 0.21 e 0.50 BASIC Package Drawing Contact: packagedrawings@atmel.com
0902G–EPROM–4/11 Atmel AT27BV020 9. Revision history Doc. rev. Date Comments 0902F 04/2011 Remove VSOP package Add “Not recommended for new designs” 0902E 12/2007
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