ees A | 2 7 C()4() Features Fast Read Access Time - 80 ns Low Power CMOS Operation 100 LA max. Standby 25 mA max. Active at 5 MHz @ Wide Selection of JEDEC Standard Packages 32-Lead 600-mil PDIP and Cerdip 32-Pad PLCC and LCC 32-Lead 450-mil SOIC (SOP) 32-Lead TSOP @ 5V+ 10% Supply High Reliability CMOS Technology 2000 V ESD Protection 200 mA Latchup Immunity Rapid Programming - 100 us/byte (typical) Two-line Control CMOS and TTL Compatible Inputs and Outputs Integrated Product Identification Code Full Military, Industrial and Commercial Temperature Ranges Description The AT27C040 chip is a low-power, high-performance 4,194,304 bit ultraviolet erasable and electrically programmable read only memory (EPROM) organized as 512K x 8 bits. The AT27C040 requires only one 5-V power supply in normal read mode operation. Any byte can be accessed in less than 80 ns, eliminating the need for speed reducing WAIT states on high- performance microprocessor systems. Atmel's 0.7-micron scaled CMOS technology provides for significantly lower active power consumption than competing designs. Power consumption is typically 8 mA in active mode and less than 10 pA in standby mode. (continued) Pin Configurations CDIP, PDIP, SOIC, Top View PinName Function AO0-A18 Addresses 00-07 Outputs CE Chip Enable OE Output Enable LCC, PLCC Top View Type 1 A12 A16 VCC A17 cE A15VPP A18 CE 06 04 GND 01 AO A2 315.17. 19 21 14-16 1B 20 02 03 O05 O01 GND O04 06 4 Megabit (512K x 8) UV Erasable CMOS EPROM 3-123AIMEL Description (Continued) The AT27C040 comes in a choice of industry standard JEDEC- approved packages including: one-time programmable (OTP) plastic PDIP, PLCC, SOIC and TSOP, as well as windowed ce- ramic Cerdip and LCC. All devices feature two line control (CE, OE) to give designers the flexibility to avoid bus contention. Atmels AT27C040 has additional features to ensure high qual- ity and efficient production use. The Rapid Programming Algo- rithm reduces the time required to program the part and guaran- tees reliable programming. Programming time is typically only 100 js/byte. The Integrated Product Identification Code elec- tronically identifies the device and manufacturer. This feature is used by industry standard programming equipment to select the proper programming algorithms and voltages. Erasure Characteristics The entire memory array of the AT27C040 is erased (all outputs read as Von) after exposure to ultraviolet light at a wavelength of 2537A. Complete erasure is assured after a minimum of 20 minutes exposure using 12,000 pW/cm* intensity lamps spaced one inch away from the chip. Minimum erase time for lamps at other intensity ratings can be calculated from the minimum in- tegrated erasure dose of 15 W-sec/cm. To prevent unintentional erasure, an opaque label is recommended to cover the clear win- dow on any UV erasable EPROM which will be subjected to continuous fluorescent indoor lighting or sunlight. Block Diagram vec DATA OUTPUTS ND 00-07 VPP - > haa phepeest OE OE, CE AND OUTPUT CE PROGRAM LOGIC BUFFERS 31 YDECODER | "8 Y-GATING AO-A18 a ADDRESS = - CELL MATRIX INPUTS X DECODER - 4 IDENTIFICATION Absolute Maximum Ratings* Temperature Under Bias .............-.. -55C to +125C Storage Temperature... -65C to +150C Voltage on Any Pin with Respect to Ground... -2.0Vto +7.0 VO) Voltage on A with Respect to Ground .....ccsscceseen -2.0 V to +14.0 Vi) Vpp Supply Voltage with Respect to Ground... eee -2.0 V to +14.0 Vi") Integrated UV Erase Dose.............. 7258 Wesec/cm? *NOTICE: Stresses beyond those listed under Absolute Maxi- mum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the de- vice 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. Notes: 1. Minimum voltage is -0.6 V de which may undershoot to -2.0 V for pulses of less than 20 ns. Maximum output pin volt- age is Vcc + 0.75 V de which may overshoot to +7.0 V for pulses of less than 20 ns. Operating Modes Mode \ Pin CE OE Ai VPP Voc Outputs Read Vit VIL Ai x!) Vcc Dout Output Disable xX Vin xX Vec High Z Standby VIH xX X Vcc High Z Rapid Program?! Vit VIH Ai Vpp Veco DIN PGM Verify X Vit Ai VpP Voc DouT PGM Inhibit Vin VIH Vpp Vec High Z =-V,, (3) Product Identification) Vit VIL Aon or VIL Xx Vec Code A1-A18=ViL Notes: 1. X can be Vit or Vin. 4. Two identifier bytes may be selected. All Ai inputs 2. Refer to Programming characteristics. 3. Vo = 12.0405 V. 3-124 are held low (VL), except A9 which is set to Vy and AO which is toggled low (Viz) to select the Manufacturers Identi- fication byte and high (Vix) to select the Device Code byte. AT27CO40 nemnne T ~ce Ordering Information [|= Advance Information tacc lec (mA) . : Ordering Code Package Operation Range (ns) Active Standby 9 9 P 9 | Commercial Spare (OPC to 70C) ma a> Commercial. - | (08S to. 70C) 2 _ Industrial (-40C to:85C) 120 25 0.1 AT27C040-12DC Commercial AT27C040-12JC (0C to 70C) AT27C040-12LC 32LW AT27C040-12PC 32P6 AT27C040-12RC 32R AT27C040-12TC 32T 120 30 0.1 AT27C040-12D1 32DW6 Industrial AT27C040-12 32u (-40C to 85C) AT27C040-12L! 32LW AT27C040-12P1 32P6 AT27C040-12Rl 32R AT27C040-12TI 32T 120 30 0.1 AT27C040-12DM 32DW6 Military AT27C040-12LM 32LW (-55C to 125C) 150 25 0.1 AT27C040-15DC 32DW6E Commercial AT27C040-155C 32J (0C to 70C) AT27C040-15LC 32LW AT27C040-15PC 32P6 AT27C040-15RC 32R AT27C040-15TC 32T 3-128 AT27CO40 nummmOrdering Information tacc lec (mA) . Ordering Code Package Operation Range (ns) Active Standby 9 9 P 9 150 30 0.1 AT27C040-15D1 32DW6 Industrial AT27C040-15uJl 32d (-40C to 85C) AT27C040-15LI 32LW AT27C040-15P! 32P6 AT27C040-15Rl 32R AT27C040-15T| 32T AT27C040-15DM 32DW6 Military AT27C040-15LM 32LW (-55C to 125C) AT27C040-15DM/883 32DW6 Military/883D AT27C040-15LM/883 32LW Class B, Fully Compliant (-55C to 125C) 200 25 0.1 AT27C040-20DC 32DWE Commercial AT27C040-205C 32J (OC to 70C) AT27C040-20LC 32LW AT27C040-20PC 32P6 AT27C040-20RC 32R AT27C040-20TC 32T 200 30 0.1 AT27C040-20DI 32DW6 Industrial AT27C040-20JI 32J (-40C to 85C) AT27C040-20L! 32LW AT27C040-20PI 32P6 AT27C040-20RI 32R AT27C040-20Ti 32T 200 30 0.1 AT27C040-20DM 32DW6 Military AT27C040-20LM 32LW (-55C to 125C) AT27C040-20DM/883 32DW6 Military/883D AT27C040-20LM/883 32LW Class B, Fully Compliant (-55C to 125C) Package Type 32DW6 32 Lead, 0.600" Wide, Windowed, Ceramic Dual Inline Package (Cerdip) 320 32 Lead, Plastic J-Leaded Chip Carrier OTP (PLCC) 32LW 32 Pad, Windowed, Ceramic Leadiess Chip Carrier (LCC) 32P6 32 Lead, 0.600" Wide, Plastic Dual inline Package OTP (PDIP) 32R 32 Lead, 0.450" Wide, Plastic Gull Wing Small Outline OTP (SOIC) 32T 32 Lead, Plastic Thin Small Outline Package OTP (TSOP) AIMEL 3-129