FINAL Am27C020 2 Megabit (262,144 x 8-Bit) CMOS EPROM DISTINCTIVE CHARACTERISTICS ■ Fast access time — 55 ns maximum access time ■ Low power consumption — 100 µA typical CMOS standby current ■ JEDEC-approved pinout — Plug in upgrade of 1 Mbit EPROM — Easy upgrade from 28-pin JEDEC EPROMs ■ Single +5 V power supply ■ ±10% power supply tolerance available ■ 100% Flashrite programming — Typical programming time of 32 seconds ■ Latch-up protected to 100 mA from –1 V to VCC + 1 V ■ High noise immunity ■ Versatile features for simple interfacing — Both CMOS and TTL input/output compatibility — Two line control functions ■ Compact 32-pin DIP, PDIP, TSOP, and PLCC packages GENERAL DESCRIPTION The Am27C020 is a 2 Mbit, ultraviolet erasable programmable read-only memory. It is organized as 256K words by 8 bits per word, operates from a single +5 V supply, has a static standby mode, and features fast single address location programming. Products are available in windowed ceramic DIP packages, as well as plastic one-time programmable (OTP) including TSOP, PLCC, and PDIP. Typically, any byte can be accessed in less than 70 ns, allowing operation with high-performance microprocessors without any WAIT states. The Am27C020 offers separate Output Enable (OE) and Chip Enable (CE) controls, thus eliminating bus contention in a multiple bus microprocessor system. AMD’s CMOS process technology provides high speed, low power, and high noise immunity. Typical power consumption is only 100 mW in active mode, and 100 µW in standby mode. All signals are TTL levels, including programming signals. Bit locations may be programmed singly, in blocks, or at random. The Am27C020 supports AMD’s Flashrite programming algorithm (100 µs pulses) resulting in typical programming times of 32 seconds. BLOCK DIAGRAM VPP VCC VSS OE CE PGM A0–A17 Address Inputs Data Outputs DQ0–DQ7 Output Enable Chip Enable and Prog Logic Output Buffers Y Decoder Y Gating X Decoder 2,097,152-Bit Cell Matrix 11507H-1 Publication# 11507 Rev: H Amendment/0 Issue Date: August 1997 PRODUCT SELECTOR GUIDE Family Part No. Am27C020 Ordering Part No: -55 -75 -55 -70 -90 -120 -150 -200 Max Access Time (ns) 55 70 90 120 150 200 250 CE (E) Access (ns) 55 70 90 120 150 200 250 OE (G) Access (ns) 35 40 40 50 65 75 75 VCC = 5.0 V ± 5% VCC = 5.0 V ±10% -255 CONNECTION DIAGRAMS Top View 32 VCC A16 2 31 PGM (P) A15 3 30 A17 A12 4 29 A14 A7 5 28 A13 A6 6 27 A5 7 A4 VPP VCC 1 A16 VPP PGM (P) A17 PLCC A12 A15 DIP 4 3 2 1 32 31 30 A7 5 29 A14 A6 6 28 A13 A8 A5 26 A9 27 26 A8 A9 8 25 A11 A4 A3 7 8 9 25 A11 A3 9 24 OE (G) A2 10 24 A2 10 23 A10 A1 11 23 OE (G) A10 A1 11 22 CE (E) A0 12 22 CE (E) DQ0 13 21 DQ7 DQ0 13 20 DQ6 DQ1 14 19 DQ5 DQ2 15 18 DQ4 VSS 16 17 DQ3 14 15 16 17 18 19 20 DQ4 DQ5 DQ6 DQ7 VSS 21 DQ3 12 DQ1 DQ2 A0 11507H-3 11507H-2 Notes: 1. JEDEC nomenclature is in parenthesis. 2. The 32-pin DIP to 32-pin PLCC configuration varies from the JEDEC 28-pin DIP to 32-pin PLCC configuration. 2 Am27C020 TSOP A11 A9 A8 A13 A14 A17 PGM VCC VPP A16 A15 A12 A7 A6 A5 A4 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 OE A10 CE DQ7 DQ6 DQ5 DQ4 DQ3 VSS DQ2 DQ1 DQ0 A0 A1 A2 A3 Standard Pinout 11507H-4 PIN DESIGNATIONS A0–A17 = Address Inputs CE (E) = Chip Enable Input DQ0–DQ7 = Data Input/Outputs OE (G) = Output Enable Input PGM (P) = Program Enable Input VCC = VCC Supply Voltage VPP = Program Voltage Input VSS = Ground LOGIC SYMBOL 18 A0–A17 DQ0–DQ7 8 CE (E) PGM (P) OE (G) 11507H-5 Am27C020 3 ORDERING INFORMATION UV EPROM Products AMD standard products are available in several packages and operating ranges. The order number (Valid Combination) is formed by a combination of: AM27C020 -55 D C 5 B OPTIONAL PROCESSING Blank = Standard Processing B = Burn-In VOLTAGE TOLERANCE 5 = VCC ± 5%, 55 ns only See Product Selector Guide and Valid Combinations TEMPERATURE RANGE C = Commercial (0°C to +70°C) I = Industrial (–40°C to +85°C) E = Extended (–55°C to +125°C) PACKAGE TYPE D = 32-Pin Ceramic DIP (CDV032) SPEED OPTION See Product Selector Guide and Valid Combinations DEVICE NUMBER/DESCRIPTION Am27C020 2 Megabit (262,144 x 8-Bit) CMOS UV EPROM Valid Combinations Valid Combinations AM27C020-55 VCC = 5.0 V ± 5% Valid Combinations list configurations planned to be supported in volume for this device. Consult the local AMD sales office to confirm availability of specific valid combinations and to check on newly released combinations. DC5, DC5B, DI5, DI5B AM27C020-55 VCC = 5.0 V ± 10% AM27C020-70 DC, DCB, DI, DIB AM27C020-90 AM27C020-120 AM27C020-150 DC, DCB, DE, DEB, DI, DIB AM27C020-200 AM27C020-255 VCC = 5.0 V ± 5% 4 DC, DCB, DI, DIB Am27C020 ORDERING INFORMATION OTP EPROM Products AMD standard products are available in several packages and operating ranges. The order number (Valid Combination) is formed by a combination of: AM27C020 -55 J 5 C OPTIONAL PROCESSING Blank = Standard Processing VOLTAGE TOLERANCE 5 = VCC ± 5%, -55 ns only See Product Selector Guide and Valid Combinations TEMPERATURE RANGE C = Commercial (0°C to +70°C) I = Industrial (–40°C to +85°C) PACKAGE TYPE P = 32-Pin Plastic DIP (PD 032) J = 32-Pin Rectangular Plastic Leaded Chip Carrier (PL 032) E = 32-Pin Thin Small Outline Package (TSOP) Standard Pinout (TS 032) SPEED OPTION See Product Selector Guide and Valid Combinations DEVICE NUMBER/DESCRIPTION Am27C020 2 Megabit (262,144 x 8-Bit) CMOS OTP EPROM Valid Combinations Valid Combinations AM27C020-55 VCC = 5.0 V ± 5% PC5, PI5, JC5, JI5, EC5, EI5 AM27C020-55 VCC = 5.0 V ± 10% Valid Combinations list configurations planned to be supported in volume for this device. Consult the local AMD sales office to confirm availability of specific valid combinations and to check on newly released combinations. AM27C020-75 AM27C020-70 AM27C020-90 PC, PI, JC, JI, EC, EI AM27C020-120 AM27C020-150 AM27C020-200 AM27C020-255 VCC = 5.0 V ± 5% Am27C020 5 Am27C020 CE input with VPP = 12.75 V ± 0.25 V, PGM LOW, and OE HIGH will program that Am27C020. FUNCTIONAL DESCRIPTION Erasing the Am27C020 In order to clear all locations of their programmed contents, it is necessary to expose the Am27C020 to an ultraviolet light source. A dosage of 15 W seconds/cm2 is required to completely erase an Am27C020. This dosage can be obtained by exposure to an ultraviolet lamp — wavelength of 2537 Å — with intensity of 12,000 µW/ cm2 for 15 to 20 minutes. The Am27C020 should be directly under and about one inch from the source and all filters should be removed from the UV light source prior to erasure. It is important to note that the Am27C020, and similar devices, will erase with light sources having wavelengths shorter than 4000 Å. Although erasure times will be much longer than with UV sources at 2537Å, nevertheless the exposure to fluorescent light and sunlight will eventually erase the Am27C020 and exposure to them should be prevented to realize maximum system reliability. If used in such an environment, the package window should be covered by an opaque label or substance. Programming the Am27C020 Upon delivery, or after each erasure, the Am27C020 has all 2,097,152 bits in the “ONE”, or HIGH state. “ZEROs” are loaded into the Am27C020 through the procedure of programming. A high-level CE input inhibits the other Am27C020s from being programmed. Program Verify A verify should be performed on the programmed bits to determine that they were correctly programmed. The verify should be performed with OE and CE at VIL, PGM at VIH, and VPP between 12.5 V and 13.0 V. Auto Select Mode The auto select mode allows the reading out of a binary code from an 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. This mode is functional in the 25°C ± 5°C ambient temperature range that is required when programming the Am27C020. To activate this mode, the programming equipment must force 12.0 V ± 0.5 V on address line A9 of the Am27C020. Two identifier bytes may then be sequenced from the device outputs by toggling address line A0 from VIL to VIH. All other address lines must be held at VIL during auto select mode. The programming mode is entered when 12.75 V ± 0.25V is applied to the VPP pin, CE and PGM are at VIL and OE is at VIH. Byte 0 (A0 = VIL) represents the manufacturer code, and Byte 1 (A0 = VIH), the device identifier code. For the Am27C020, these two identifier bytes are given in the Mode Select table. All identifiers for manufacturer and device codes will possess odd parity, with the MSB (DQ7) defined as the parity bit. For programming, the data to be programmed is applied 8 bits in parallel to the data output pins. Read Mode The Flashrite algorithm reduces programming time by using 100 µs programming pulse and by giving each address only as many pulses as are necessary in order to reliably program the data. After each pulse is applied to a given address, the data in that address is verified. If the data does not verify, additional pulses are given until it verifies or the maximum is reached. This process is repeated while sequencing through each address of the Am27C020. This part of the algorithm is done at VCC = 6.25 V to assure that each EPROM bit is programmed to a sufficiently high threshold voltage. After the final address is completed, the entire EPROM memory is verified at VCC = VPP = 5.25 V. Program Inhibit Programming of multiple Am27C020s in parallel with different data is also easily accomplished. Except for CE, all like inputs of the parallel Am27C020 may be common. A TTL low-level program pulse applied to an 6 The Am27C020 has two control functions, both of which must be logically satisfied in order to obtain data at the outputs. Chip Enable (CE) is the power control and should be used for device selection. Output Enable (OE) is the output control and should be used to gate data to the output pins, independent of device selection. Assuming that addresses are stable, address access time (tACC) is equal to the delay from CE to output (tCE). Data is available at the outputs tOE after the falling edge of OE, assuming that CE has been LOW and addresses have been stable for at least tACC - tOE. Standby Mode The Am27C020 has a CMOS standby mode which reduces the maximum VCC current to 100 mA. It is placed in CMOS-standby when CE is at V CC ± 0.3 V. The Am27C020 also has a TTL-standby mode which reduces the maximum VCC current to 1.0 mA. It is placed in TTL-standby when CE is at VIH. When in standby mode, the outputs are in a high-impedance state, independent of the OE input. Am27C020 Output OR-Tieing System Applications To accommodate multiple memory connections, a two-line control function is provided to allow for: During the switch between active and standby conditions, transient current peaks are produced on the rising and falling edges of Chip Enable. The magnitude of these transient current peaks is dependent on the output capacitance loading of the device. At a minimum, a 0.1 µF ceramic capacitor (high frequency, low inherent inductance) should be used on each device between VCC and VSS to minimize transient effects. In addition, to overcome the voltage drop caused by the inductive effects of the printed circuit board traces on EPROM arrays, a 4.7 µF bulk electrolytic capacitor should be used between VCC and VSS for each eight devices. The location of the capacitor should be close to where the power supply is connected to the array. ■ Low memory power dissipation, and ■ Assurance that output bus contention will not occur It is recommended that CE be decoded and used as the primary device-selecting function, while OE be made a common connection to all devices in the array and connected to the READ line from the system control bus. This assures that all deselected memory devices are in their low-power standby mode and that the outut pins are only active when data is desired from a particular memory device. MODE SELECT TABLE Pins CE OE PGM A0 A9 VPP Outputs VIL VIL X X X X DOUT Output Disable X VIH X X X X High Z Standby (TTL) VIH X X X X X High Z VCC ± 0.3 V X X X X X High Z Program VIL VIH VIL X X VPP DIN Program Verify VIL VIL VIH X X VPP DOUT Program Inhibit VIH X X X X VPP High Z Manufacturer Code VIL VIL X VIL VH X 01H Device Code VIL VIL X VIH VH X 97H Mode Read Standby (CMOS) Auto Select (Note 3) Notes: 1. VH = 12.0 V ± 0.5 V. 2. X = Either VIH or VIL. 3. A1–A8 = A10–A17 = VIL. 4. See DC Programming Characteristics for VPP voltage during programming. Am27C020 7 ABSOLUTE MAXIMUM RATINGS OPERATING RANGES Storage Temperature: Commercial (C) Devices OTP Products. . . . . . . . . . . . . . . –65°C to +125°C Ambient Temperature (TA) . . . . . . . . . . .0°C to +70°C All Other Products . . . . . . . . . . . –65°C to +150°C Industrial (I) Devices Ambient Temperature with Power Applied. . . . . . . . . . . . . . –55°C to +125°C Ambient Temperature (TA) . . . . . . . . .–40°C to +85°C Voltage with Respect to VSS: All pins except A9, VPP, VCC . . . .–0.6 V to VCC + 0.6 V Ambient Temperature (TA) . . . . . . . .–55°C to +125°C A9 and VPP (Note 2). . . . . . . . . . . . . . –0.6 V to 13.5 V VCC (Note 1) . . . . . . . . . . . . . . . . . . . . –0.6 V to 7.0 V Notes: 1. Minimum DC voltage on input or I/O pins is –0.5 V. During voltage transitions, the input may overshoot VSS to –2.0 V for periods of up to 20 ns. Maximum DC voltage on input and I/O pins is VCC + 0.5 V. During voltage transitions, input and I/O pins may overshoot to VCC + 2.0 V for periods of up to 20 ns. Extended (E) Devices Supply Read Voltages: VCC for Am27C020-55, 75, 255 . . +4.75 V to +5.25 V VCC for Am27C020-55, 70, 90, 120, 150, 200 . . . . . . . . . . . . . +4.50 V to +5.50 V Operating ranges define those limits between which the functionality of the device is guaranteed. 2. Minimum DC input voltage on A9 pin is –0.5 V. During voltage transitions, A9 and VPP may overshoot VSS to –2.0 V for periods of up to 20 ns. A9 and VCC must not exceed +13.5 V for any period of time. Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliability. 8 Am27C020 DC CHARACTERISTICS over operating ranges unless otherwise specified (Notes 1, 2, and 4) PRELIMINARY Parameter Symbol Parameter Description Test Conditions VOH Output HIGH Voltage IOH = –400 µA VOL Output LOW Voltage IOL = 2.1 mA VIH Input HIGH Voltage VIL Input LOW Voltage ILI Input Load Current ILO ICC1 Min Max 2.4 Unit V 0.45 V 2.0 VCC + 0.5 V –0.5 +0.8 V VIN = 0 V to VCC 1.0 µA Output Leakage Current VOUT = 0 V to VCC 5.0 µA VCC Active Current (Note 3) CE = VIL, f = 10 MHz, IOUT = 0 mA C/I Devices 30 E Devices 60 mA ICC2 VCC TTL Standby Current CE = VIH 1.0 mA ICC3 VCC CMOS Standby Current CE = VCC + 0.3 V 100 µA IPP1 VPP Supply Current (Read) CE = OE = VIL, VPP = VCC 100 µA Notes: 1. VCC must be applied simultaneously or before VPP, and removed simultaneously or after VPP. 2. Caution: The Am27C020 must not be removed from (or inserted into) a socket when VCC or VPP is applied. 3. ICC1 is tested with OE = VIH to simulate open outputs. 30 30 25 25 Supply Current in mA Supply Current in mA 4. Minimum DC Input Voltage is –0.5 V. During transitions, the inputs may overshoot to –2.0 V for periods less than 20 ns. Maximum DC Voltage on output pins is VCC + 0.5 V, which may overshoot to VCC + 2.0 V for periods less than 20 ns. 20 15 10 1 2 3 4 5 6 7 Frequency in MHz 8 9 10 20 15 10 –75 –50 –25 0 25 50 75 100 125 150 Temperature in °C 11507H-7 11507H-6 Figure 2. Typical Supply Current vs. Temperature VCC = 5.5 V, f = 10 MHz Figure 1. Typical Supply Current vs. Frequency VCC = 5.5 V, T = 25°C Am27C020 9 CAPACITANCE Parameter Symbol Parameter Description Test Conditions CDV032 PD 032 PL 032 TS 032 Typ Max Typ Max Typ Max Typ Max Unit CIN Input Capacitance VIN = 0 10 12 10 12 8 10 10 12 pF COUT Output Capacitance VOUT = 0 12 15 12 15 9 12 12 14 pF Notes: 1. This parameter is only sampled and not 100% tested. 2. TA = +25°C, f = 1 MHz. AC CHARACTERISTICS Parameter Symbols Am27C020 -55 -75 -70 -90 -120 -150 -200 -255 Unit Max 55 70 90 120 150 200 250 ns OE = VIL Max 55 70 90 120 150 200 250 ns CE = VIL Max 40 40 40 50 65 75 100 ns Chip Enable High or Output Enable High to Output Float, Whichever Occurs First Max 25 25 25 30 30 40 60 ns Output Hold Time from Addresses, CE or OE, Whichever Occurs First Min 0 0 0 0 0 0 0 ns JEDEC Standard Description Test Setup tAVQV tACC Address to Output Delay CE, OE = VIL tELQV tCE Chip Enable to Output Delay tGLQV tOE Output Enable to Output Delay tEHQZ tGHQZ tDF (Note 3) tAXQX tOH Notes: 1. Caution: Do not remove the Am27C020 from (or insert it into) a socket or board that has VPP or VCC applied. 2. VCC must be applied simultaneously or before VPP, and removed simultaneously or after VPP. 3. This parameter is sampled and not 100% tested. 4. Switching characteristics are over operating range, unless otherwise specified. 5. Test Conditions for Am27C020-55: Output Load: 1 TTL gate and CL = 30 pF Input rise and fall times: 20 ns Input pulse levels: 0.0 V to 3.0 V Timing measurement reference level Inputs and Outputs: 1.5 V Test Conditions for all others: Output Load: 1 TTL gate and CL = 100 pF Input rise and fall times: 20 ns Input pulse levels: 0.45 V to 2.4 V Timing measurement reference level Inputs and Outputs: 0.8 and 2.0 V 10 Am27C020 SWITCHING TEST CIRCUIT 5.0 V IN3064 or Equivalent Device Under Test CL 2.7 kΩ 6.2 kΩ Diodes = IN3064 or Equivalent Notes: For -55: CL = 30 pF including jig capacitance For all others: CL = 100 pF including jig capacitance 11507H-8 Test Conditions SWITCHING TEST WAVEFORM 3V 2.4 V 2.0 V 2.0 V Test Points 1.5 V Test Points 1.5 V 0.8 V 0V 0.8 V 0.45 V Input Output Input AC Testing for -55 devices: Inputs are driven at 3.0 V for a logic “1” and 0 V for a logic “0”. Input pulse rise and fall times are ≤20 ns. Output AC Testing (except for -55 devices): Inputs are driven at 2.4 V for a logic “1” and 0.45 V for a logic “0”. Input pulse rise and fall times are ≤20 ns. 11507H-9 Am27C020 11 KEY TO SWITCHING WAVEFORMS WAVEFORM INPUTS OUTPUTS Must Be Steady Will Be Steady May Change from H to L Will Be Changing from H to L May Change from L to H Will Be Changing from L to H Don’t Care, Any Change Permitted Changing, State Unknown Does Not Apply Center Line is High-Impedance “Off” State KS000010 SWITCHING WAVEFORM 2.4 Addresses 0.45 2.0 0.8 2.0 0.8 Addresses Valid CE tCE OE tOE Output High Z tACC (Note 1) tOH Valid Output tDF (Note 2) High Z 11507H-10 Notes: 1. OE may be delayed up to tACC - tOE after the falling edge of the addresses without impact on tACC. 2. tDF is specified from OE or CE, whichever occurs first. Trademarks Copyright © 1997 Advanced Micro Devices, Inc. All rights reserved. AMD, the AMD logo, and combinations thereof are trademarks of Advanced Micro Devices, Inc. Flashrite is a trademark of Advanced Micro Devices, Inc. Product names used in this publication are for identification purposes only and may be trademarks of their respective companies. 12 Am27C020 REVISION SUMMARY FOR AM27C020 Operating Ranges: Distinctive Characteristics: Changed Supply Read Voltages listings to match those in the Product Selector Guide. The fastest speed grade available is now 55 ns. AC Characteristics: Product Selector Guide: Added 55 ns column. Added column for 55 ns speed grade, rearranged notes, moved text from table title to Note 4, renamed table. Connection Diagrams Switching Test Circuit: PLCC Package: Corrected pin 30 to A17. Added 55 ns to the CL note on 30 pF test condition. Ordering Information, UV EPROM Products: Switching Test Waveform: The 55 ns part number is now listed in the example. The nomenclature now has a method of clearly designating the voltage operating range and speed grade. Added the 3 V test waveform. Corrected family part number. Valid Combinations: The 55 ns speed grade is now also available in the industrial temperature range, and can be burned in. Ordering Information, OTP EPROM Products: Changed the part number example from -75 to -55. The nomenclature now has a method of clearly designating the voltage operating range and speed grade. Valid Combinations: Added the 55 ns speed grade to the table. Am27C020 13