AT27C1024 ATMEL | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 9

Technical content

Features

  • Fast Read Access Time - 45 ns
  • Low Power CMOS Operation – 100 µA max. Standby – 30 mA max. Active at 5 MHz
  • JEDEC Standard Packages – 40-Lead 600-mil PDIP – 44-Lead PLCC – 40-Lead TSOP (10 mm x 14 mm)
  • Direct Upgrade from 512K (AT27C516) EPROM
  • 5V ± 10% Power Supply
  • High Reliability CMOS Technology – 2000V ESD Protection – 200 mA Latchup Immunity
  • Rapid™ Programming Algorithm - 100 µs/word (typical)
  • CMOS and TTL Compatible Inputs and Outputs
  • Integrated Product Identification Code
  • Commercial and Industrial Temperature Ranges

Description

The AT27C1024 is a low-power, high-performance 1,048,576 bit one-time program- mable read only memory (OTP EPROM) organized 64K by 16 bits. It requires only one 5V power supply in normal read mode operation. Any word can be accessed in less than 45 ns, eliminating the need for speed reducing WAIT states. The by-16 organization make this part ideal for high-performance 16- and 32-bit microprocessor systems. 0019I-A–7/97 AT27C1024 1-Megabit (64K x 16) OTP EPROM AT27C1024 Pin Configurations Note: Both GND pins must be connected. Pin Name Function A0 - A15 Addresses O0 - O15 Outputs CE Chip Enable OE Output Enable PGM Program Strobe NC No Connect (continued)

In read mode, the AT27C1024 typically consumes 15 mA. Standby mode supply current is typically less than 10 µA. The AT27C1024 is available in industry standard JEDEC- approved one-time programmable (OTP) plastic PDIP, PLCC, and TSOP packages. The device features two-line control (CE , OE) to eliminate bus contention in high-speed systems. With high density 64K word storage capability, the AT27C1024 allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media. Atmel’s 27C1024 have additional features to ensure high quality and efficient production use. The Rapid ™ Program- ming Algorithm reduces the time required to program the part and guarantees reliable programming. Programming time is typically only 100 µs/word. 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 between active and standby conditions via the Chip Enable pin may produce transient voltage excursions. Unless accommodated by the system design, these tran- sients may exceed data sheet limits, resulting in device non-conformance. At a minimum, a 0.1 µF high frequency, low inherent inductance, ceramic capacitor should be uti- lized 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 4.7 µF 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.

Absolute Maximum Ratings* mum 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 condi- tions beyond those indicated in the operational sec- tions of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Note: Minimum voltage is -0.6V DC which may undershoot to -2.0V for pulses of less than 20 ns. Maximum output pin voltage is V CC + 0.75V DC which may overshoot to +7.0V for pulses of less than 20 ns. Voltage on Any Pin with Voltage on A9 with (1) VPP Supply Voltage with Operating Modes Notes: 1. X can be VIL or VIH. 2. Refer to Programming Characteristics. 3. V H = 12.0 ± 0.5V. 4. Two identifier words may be selected. All Ai inputs are held low (VIL), except A9 which is set to VH and A0 which is toggled low (VIL) to select the Manufacturer’s Identification word and high (VIH) to select the Device Code word. 5. Standby VCC current (ISB ) is specified with VPP = VCC . VCC > VPP will cause a slight increase in ISB . Mode/Pin CE OE PGM Ai V PP Outputs Read V IL VIL X(1) Ai X D OUT Output Disable X V IH XXX H i g h Z Standby V IH XX X X (5) High Z Rapid Program(2) VIL VIH VIL Ai V PP D IN PGM Verify V IL VIL VIH Ai V PP D OUT PGM Inhibit V IH XX X V PP High Z Product Identification(4) VIL VIL X A9 = VH (3) A0 = VIH or VIL A1 - A15 = VIL VCC Identification Code

DC and AC Operating Conditions for Read Operation DC and Operating Characteristics for Read Operation Note: 1. V CC must be applied simultaneously or before VPP, and removed simultaneously or after VPP. 2. VPP may be connected directly to VCC , except during programming. The supply current would then be the sum of ICC and IPP. AC Characteristics for Read Operation Notes: 2, 3, 4, 5. - see AC Waveforms for Read Operation. AT27C1024 - 4 5- 5 5- 7 0- 9 0- 1 2- 1 5 Operating Temperature (Case) V CC Power Supply 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10% Symbol Parameter Condition Min Max Units ILI Input Load Current V IN = 0V to VCC ± 1 µA ILO Output Leakage Current V OUT = 0V to VCC ± 5 µA 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 = 5 MHz, I OUT = 0 mA, CE = VIL 30 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 = 2.1 mA 0.4 V VOH Output High Voltage I OH = -400 µA2 . 4 V AT27C1024 Units Symbol Parameter Condition Min Max Min Max Min Max Min Max Min Max Min Max tACC (3) Address to Output Delay CE = OE = VIL 45 55 70 90 120 150 ns tCE (2) CE to Output Delay OE = VIL 45 55 70 90 120 150 ns tOE (2)(3) OE to Output Delay CE = VIL 20 25 25 30 35 50 ns tDF (4)(5) OE or CE High to Output Float, whichever occurred first 20 25 25 30 30 40 ns tOH Output Hold from Address, CE or OE, whichever occurred first 777000 n s

AC Waveforms for Read Operation(1) Timing measurement reference levels for all other speed grades are VOL = 0.8V and VOH = 2.0V . Input AC drive levels are VIL = 0.45V and VIH = 2.4V . 2. OE may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE . 3. OE may be delayed up to tACC - tOE after the address is valid without impact on tACC . 4. This parameter is only sampled and is not 100% tested. 5. Output float is defined as the point when data is no longer driven. Pin Capacitance (f = 1 MHz T = 25°C)(1) Note: 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested. Typ Max Units Conditions C IN 41 0 p F V IN = 0V C OUT 81 2 p F V OUT = 0V Input Test Waveforms and Measurement Levels For -45 and -55 Devices Only For -70 and slower Devices Only Output Test Load Note: C L = 100 pF including jig capacitance except -45 and -55 devices, where C L = 30 pF .

Programming Waveforms (1) Notes: 1. The Input Timing Reference is 0.8V for VIL and 2.0V for VIH. 2. tOE and tDFP are characteristics of the device but must be accommodated by the programmer. 3. When programming the AT27C1024 a 0.1 µF capacitor is reqired across VPP and ground to suppress sputious voltage tran- sients. DC Programming Characteristics 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 + 0.1 V VOL Output Low Voltage I OL = 2.1 mA 0.4 V VOH Output High Voltage I OH = -400 µA2 . 4 V ICC2 VCC Supply Current (Program and Verify) 50 mA IPP2 VPP Supply Current CE = PGM = VIL 30 mA VID A9 Product Identification Voltage 11.5 12.5 V

AC Programming Characteristics TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V Notes: 1. V CC must be applied simultaneously or before VPP and removed simultaneously 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 100 µsec ± 5%. 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 2 µs 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 Out- put Float Delay(2) 0 130 ns tVPS VPP Setup Time 2 µs tVCS VCC Setup Time 2 µs tPW PGM Program Pulse Width(3) 95 105 µs tOE Data Valid from OE 150 ns tPRT VPP Pulse Rise Time During Programming 50 ns Atmel’s 27C1024 Integrated Product Identification Code Codes Pins Hex DataA 0 0 1 5 - 0 8 O 7O 6O 5O 4O 3O 2O 1O 0 M a n u f a c t u r e r 0 0 000111100 0 1 E D e v i c e T y p e 1 0 111100010 0 F 1

Rapid Programming Algorithm A 100 µ s 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 100 µs PGM pulse without verification. Then a ver- ification / reprogramming loop is executed for each address. In the event a word fails to pass verification, up to 10 successive 100 µs pulses are applied with a verification after each pulse. If the word fails to verify after 10 pulses have been applied, the part is considered failed. After the word verifies properly, the next address is selected until all have been checked. VPP is then lowered to 5.0V and VCC to 5.0V. All words are read again and compared with the original data to determine if the device passes or fails.

Ordering Information

(ns) ICC (mA) Ordering Code Package Operation RangeActive Standby 45 30 0.1 AT27C1024-45JC AT27C1024-45PC AT27C1024-45VC 44J 40P6 40V Commercial (0°C to 70°C) 30 0.1 AT27C1024-45JI AT27C1024-45PI AT27C1024-45VI 44J 40P6 40V Industrial (-40°C to 85°C) 55 30 0.1 AT27C1024-55JC AT27C1024-55PC AT27C1024-55VC 44J 40P6 40V Commercial (0°C to 70°C) 30 0.1 AT27C1024-55JI AT27C1024-55PI AT27C1024-55VI 44J 40P6 40V Industrial (-40°C to 85°C) 70 30 0.1 AT27C1024-70JC AT27C1024-70PC AT27C1024-70VC 44J 40P6 40V Commercial (0°C to 70°C) 30 0.1 AT27C1024-70JI AT27C1024-70PI AT27C1024-70VI 44J 40P6 40V Industrial (-40°C to 85°C) 90 30 0.1 AT27C1024-90JC AT27C1024-90PC AT27C1024-90VC 44J 40P6 40V Commercial (0°C to 70°C) 30 0.1 AT27C1024-90JI AT27C1024-90PI AT27C1024-90VI 44J 40P6 40V Industrial (-40°C to 85°C) 120 30 0.1 AT27C1024-12JC AT27C1024-12PC AT27C1024-12VC 44J 40P6 40V Commercial (0°C to 70°C) 30 0.1 AT27C1024-12JI AT27C1024-12PI AT27C1024-12VI 44J 40P6 40V Industrial (-40°C to 85°C) 150 30 0.1 AT27C1024-15JC AT27C1024-15PC AT27C1024-15VC 44J 40P6 40V Commercial (0°C to 70°C) 30 0.1 AT27C1024-15JI AT27C1024-15PI AT27C1024-15VI 44J 40P6 40V Industrial (-40°C to 85°C) Package Type 44J 44-Lead, Plastic J-Leaded Chip Carrier (PLCC) 40P6 40-Lead, 0.600" Wide, Plastic Dual Inline Package (PDIP) 40V 40-Lead, Plastic Thin Small Outline Package (TSOP) 10 x 14 mm