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| Features * Fast Read Access Time - 45 ns * Low-Power CMOS Operation * - 100 A max. Standby - 20 mA max. Active at 5 MHz JEDEC Standard Packages - 28-Lead 600-mil PDIP - 32-Lead PLCC - 28-Lead TSOP and SOIC 5V 10% Supply High Reliability CMOS Technology - 2,000V ESD Protection - 200 mA Latchup Immunity RapidTM Programming Algorithm - 100 s/byte (typical) CMOS and TTL Compatible Inputs and Outputs Integrated Product Identification Code Commercial, Industrial and Automotive Temperature Ranges * * * * * * 256K (32K x 8) OTP EPROM AT27C256R Description The AT27C256R is a low-power, high-performance 262,144-bit one-time programmable read only memory (OTP EPROM) organized 32K by 8 bits. It requires only one 5V power supply in normal read mode operation. Any byte can be accessed in less than 45 ns, eliminating the need for speed reducing WAIT states on high-performance microprocessor systems. Atmel's scaled CMOS technology provides low-active power consumption, and fast programming. Power consumption is typically only 8 mA in Active Mode and less than 10 A in Standby. (continued) Pin Configurations Pin Name A0 to A14 O0 - O7 CE OE NC Function Addresses Outputs Chip Enable Output Enable No Connect PDIP SOIC Top View , VPP A12 A7 A6 A5 A4 A3 A2 A1 A0 O0 O1 O2 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VCC A14 A13 A8 A9 A11 OE A10 CE O7 O6 O5 O4 O3 256K EPROM PLCC Top View TSOP Top View Type 1 A8 A9 A11 NC OE A10 CE O7 O6 OE A11 A9 A8 A13 A14 VCC VPP A12 A7 A6 A5 A4 A3 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 A10 CE O7 O6 O5 O4 O3 GND O2 O1 O0 A0 A1 A2 A7 A12 VPP NC VCC A14 A13 O1 O2 GND NC O3 O4 O5 14 15 16 17 18 19 20 A6 A5 A4 A3 A2 A1 A0 NC O0 5 6 7 8 9 10 11 12 13 4 3 2 1 32 31 30 29 28 27 26 25 24 23 22 21 Note: PLCC Package Pins 1 and 17 are DON'T CONNECT. Rev. 0014H-07/98 1 The AT27C256R is available in a choice of industry standard JEDEC-approved one time programmable (OTP) plastic DIP, PLCC, SOIC, and TSOP packages. All devices feature two-line control (CE, OE) to give designers the flexibility to prevent bus contention. With 32K byte storage capability, the AT27C256R allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media. Atmel's 27C256R has additional features to ensure high quality and efficient production use. The RapidTM Programming Algorithm reduces the time required to program the part and guarantees reliable programming. Programming time is typically only 100 s/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 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 data sheet limits, resulting in device non-conformance. At a minimum, a 0.1 F 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 4.7 F 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. 2 AT27C256R AT27C256R Block Diagram Absolute Maximum Ratings* Temperature Under Bias ................................ -55C to +125C Storage Temperature ..................................... -65C to +150C 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 +7.0 volts for pulses of less than 20 ns. Operating Modes Mode\Pin Read Output Disable Standby Rapid Program PGM Verify(2) Optional PGM Verify(2) PGM Inhibit (2) (2) CE VIL VIL VIH VIL X(1) VIL VIH VIL OE VIL VIH X (1) Ai Ai X(1) X (1) VPP VCC VCC VCC VPP VPP VCC VPP (3) Outputs DOUT High Z High Z DIN DOUT DOUT High Z Identification Code VIH VIL VIL VIH VIL Ai Ai Ai X (1) Product Identification(4) Notes: 1. X can be VIL or VIH. A9 = VH A0 = VIH or VIL A1 - A14 = VIL VCC 2. Refer to Programming Characteristics. 3. VH = 12.0 0.5V. 4. Two identifier bytes 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 byte and high (VIH) to select the Device Code byte. 3 DC and AC Operating Conditions for Read Operation AT27C256R -45 Com. Operating Temp. (Case) VCC Supply Ind. Auto. 5V 10% 5V 10% 0C - 70C -40C - 85C -55 0C - 70C -40C - 85C -70 0C - 70C -40C - 85C -40C - 125C 5V 10% -90 0C - 70C -40C - 85C -40C - 125C 5V 10% -12 0C - 70C -40C - 85C -40C - 125C 5V 10% -15 0C - 70C -40C - 85C -40C - 125C 5V 10% DC and Operating Characteristics for Read Operation Symbol ILI Parameter Input Load Current Condition Com., Ind. VIN = 0V to VCC Auto. Com., Ind. ILO IPP1 ISB ICC VIL VIH VOL VOH Notes: (2) Min Max 1 5 5 10 10 100 1 20 Units A A A A A A mA mA V V V V Output Leakage Current VPP (1) VOUT = 0V to VCC VPP = VCC ISB1 (CMOS), CE = VCC 0.3V ISB2 (TTL), CE = 2.0 to VCC + 0.5V f = 5 MHz, IOUT = 0 mA, E = VIL Auto. Read/Standby Current VCC(1) Standby Current VCC Active Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage -0.6 2.0 IOL = 2.1 mA IOH = -400 A 2.4 0.8 VCC + 0.5 0.4 1. VCC must be applied simultaneously with or before VPP, and removed simultaneously with 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 AT27C256R -45 Symbol Parameter tACC tCE (3) -55 -70 -90 -12 -15 Condition Min Max Min Max Min Max Min Max Min Max Min Max Units 45 45 20 20 7 7 55 55 25 20 7 70 70 30 25 0 90 90 30 25 0 120 120 35 30 0 150 150 40 35 ns ns ns ns ns Address to Output Delay CE = OE = VIL CE to Output Delay OE to Output Delay OE = VIL CE = VIL (2) tOE(2)(3) tDF(4)(5) tOH Note: OE or CE High to Output Float, whichever occurred first Output Hold from Address, CE or OE, whichever occurred first 2, 3, 4, 5. - see AC Waveforms for Read Operation. 4 AT27C256R AT27C256R AC Waveforms for Read Operation(1) Notes: 1. Timing measurement reference level is 1.5V for -45 and -55 devices. Input AC drive levels are VIL = 0.0V and VIH = 3.0V. Timing measurement reference levels for all other speed grades are V OL = 0.8V and VOH = 2.0V. Input AC drive levels are VIL = 0.45V and VIH = 2.4V. OE may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE. OE 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. 2. 3. 4. 5. Input Test Waveforms and Measurement Levels For -45 and -55 devices only: Output Test Load tR, tF < 5 ns (10% to 90%) For -70, -90, -12, and -15 devices: Note: CL = 100 pF including jig capacitance, except for the -45 and -55 devices, where CL = 30 pF. tR, tF < 20 ns (10% to 90%) Pin Capacitance (f = 1MHz, T = 25C)(1) Typ CIN COUT Note: 4 8 Max 6 12 Units pF pF Conditions VIN = 0V VOUT = 0V 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested. 5 Programming Waveforms(1) Notes: 1. 2. 3. 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. When programming the AT27C256R a 0.1 F capacitor is required across VPP and ground to suppress spurious voltage transients. DC Programming Characteristics TA = 25 5C, VCC = 6.5 0.25V, VPP = 13.0 0.25V Limits Symbol ILI VIL VIH VOL VOH ICC2 IPP2 VID Parameter Input Load Current Input Low Level Input High Level Output Low Volt Output High Volt VCC Supply Current (Program and Verify) VPP Current A9 Product Identification Voltage CE = VIL 11.5 IOL = 2.1 mA IOH = -400 A 2.4 25 25 12.5 Test Conditions VIN = VIL,VIH -0.6 2.0 Min Max 10 0.8 VCC + 1 0.4 Units A V V V V mA mA V 6 AT27C256R AT27C256R AC Programming Characteristics TA = 25 5C, VCC = 6.5 0.25V, VPP = 13.0 0.25V Limits Symbol tAS tOES tDS tAH tDH tDFP tVPS tVCS tPW tOE tPRT Notes: Parameter Address Setup Time OE Setup Time Data Setup Time Address Hold Time Data Hold Time OE High to Output Float Delay(2) VPP Setup Time VCC Setup Time CE Program Pulse Width Data Valid from OE (2) (3) Test Conditions (1) Min 2 2 Max Units s s s s s 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 0 2 0 2 2 95 105 150 50 130 ns s s s ns ns VPP Pulse Rise Time During Programming 1. VCC 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 sec 5%. Atmel's 27C256R Integrated Product Identification Code Pins Codes Manufacturer Device Type A0 0 1 O7 0 1 O6 0 0 O5 0 0 O4 1 0 O3 1 1 O2 1 1 O1 1 0 O0 0 0 Hex Data 1E 8C 7 Rapid Programming Algorithm A 100 s CE 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 s CE 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 100 s 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. VPP 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. 8 AT27C256R AT27C256R Ordering Information tACC (ns) 45 ICC (mA) Active 20 Standby 0.1 Ordering Code AT27C256R-45JC AT27C256R-45PC AT27C256R-45RC AT27C256R-45TC AT27C256R-45JI AT27C256R-45PI AT27C256R-45RI AT27C256R-45TI AT27C256R-55JC AT27C256R-55PC AT27C256R-55RC AT27C256R-55TC AT27C256R-55JI AT27C256R-55PI AT27C256R-55RI AT27C256R-55TI AT27C256R-70JC AT27C256R-70PC AT27C256R-70RC AT27C256R-70TC AT27C256R-70JI AT27C256R-70PI AT27C256R-70RI AT27C256R-70TI AT27C256R-70JA AT27C256R-70PA AT27C256R-70RA Package 32J 28P6 28R 28T 32J 28P6 28R 28T 32J 28P6 28R 28T 32J 28P6 28R 28T 32J 28P6 28R 28T 32J 28P6 28R 28T 32J 28P6 28R Operation Range Commercial (0C to 70C) 20 0.1 Industrial (-40C to 85C) 55 20 0.1 Commercial (0C to 70C) 20 0.1 Industrial (-40C to 85C) 70 20 0.1 Commercial (0C to 70C) 20 0.1 Industrial (-40C to 85C) 20 0.1 Automotive (-40C to 125C) (continued) Package Type 32J 28P6 28R 28T 32-Lead, Plastic J-Leaded Chip Carrier (PLCC) 28-Lead, 0.600" Wide, Plastic Dual Inline Package (PDIP) 28-Lead, 0.330" Wide, Plastic Gull Wing Small Outline (SOIC) 28-Lead, Thin Small Outline Package (TSOP) 9 Ordering Information (Continued) tACC (ns) 90 ICC (mA) Active 20 Standby 0.1 Ordering Code AT27C256R-90JC AT27C256R-90PC AT27C256R-90RC AT27C256R-90TC AT27C256R-90JI AT27C256R-90PI AT27C256R-90RI AT27C256R-90TI AT27C256R-90JA AT27C256R-90PA AT27C256R-90RA AT27C256R-12JC AT27C256R-12PC AT27C256R-12RC AT27C256R-12TC AT27C256R-12JI AT27C256R-12PI AT27C256R-12RI AT27C256R-12TI AT27C256R-12JA AT27C256R-12PA AT27C256R-12RA AT27C256R-15JC AT27C256R-15PC AT27C256R-15RC AT27C256R-15TC AT27C256R-15JI AT27C256R-15PI AT27C256R-15RI AT27C256R-15TI AT27C256R-15JA AT27C256R-15PA AT27C256R-15RA Package 32J 28P6 28R 28T 32J 28P6 28R 28T 32J 28P6 28R 32J 28P6 28R 28T 32J 28P6 28R 28T 32J 28P6 28R 32J 28P6 28R 28T 32J 28P6 28R 28T 32J 28P6 28R Operation Range Commercial (0C to 70C) 20 0.1 Industrial (-40C to 85C) 20 0.1 Automotive (-40C to 125C) Commercial (0C to 70C) 120 20 0.1 20 0.1 Industrial (-40C to 85C) 20 0.1 Automotive (-40C to 125C) Commercial (0C to 70C) 150 20 0.1 20 0.1 Industrial (-40C to 85C) 20 0.1 Automotive (-40C to 125C) Package Type 32J 28P6 28R 28T 32-Lead, Plastic J-Leaded Chip Carrier (PLCC) 28-Lead, 0.600" Wide, Plastic Dual Inline Package (PDIP) 28-Lead, 0.330" Wide, Plastic Gull Wing Small Outline (SOIC) 28-Lead, Thin Small Outline Package (TSOP) 10 AT27C256R AT27C256R Packaging Information 32J, 32-Lead, Plastic J-Leaded Chip Carrier (PLCC) Dimensions in Inches and (Millimeters) JEDEC STANDARD MS-016 AE 28P6, 28-Lead, 0.600" Wide, Plastic Dual Inline Package (PDIP) Dimensions in Inches and (Millimeters) JEDEC STANDARD MS-011 AB 1.47(37.3) 1.44(36.6) .045(1.14) X 45 PIN NO. 1 IDENTIFY .025(.635) X 30 - 45 .012(.305) .008(.203) .530(13.5) .490(12.4) .021(.533) .013(.330) PIN 1 .032(.813) .026(.660) .553(14.0) .547(13.9) .595(15.1) .585(14.9) .566(14.4) .530(13.5) 1.300(33.02) REF .090(2.29) MAX .005(.127) MIN .050(1.27) TYP .300(7.62) REF .430(10.9) .390(9.90) AT CONTACT POINTS .030(.762) .015(3.81) .095(2.41) .060(1.52) .140(3.56) .120(3.05) .220(5.59) MAX SEATING PLANE .161(4.09) .125(3.18) .110(2.79) .090(2.29) .065(1.65) .041(1.04) .630(16.0) .590(15.0) 0 REF 15 .690(17.5) .610(15.5) .065(1.65) .015(.381) .022(.559) .014(.356) .022(.559) X 45 MAX (3X) .453(11.5) .447(11.4) .495(12.6) .485(12.3) .012(.305) .008(.203) 28R, 28-Lead, 0.330" Wide, Plastic Gull Wing Small Outline (SOIC) Dimensions in Inches and (Millimeters) 28T, 28-Lead, Plastic Thin Small Outline Package (TSOP) Dimensions in Millimeters and (Inches)* INDEX MARK AREA 11.9 (0.469) 11.7 (0.461) 13.7 (0.539) 13.1 (0.516) 0.55 (0.022) BSC 7.15 (0.281) REF 8.10 (0.319) 7.90 (0.311) 0.27 (0.011) 0.18 (0.007) 1.25 (0.049) 1.05 (0.041) 0.20 (0.008) 0.10 (0.004) 0 5 REF 0.20 (0.008) 0.15 (0.006) 0.70 (0.028) 0.30 (0.012) *Controlling dimension: millimeters 11 Atmel Headquarters Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL (408) 441-0311 FAX (408) 487-2600 Atmel Operations Atmel Colorado Springs 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL (719) 576-3300 FAX (719) 540-1759 Europe Atmel U.K., Ltd. Coliseum Business Centre Riverside Way Camberley, Surrey GU15 3YL England TEL (44) 1276-686677 FAX (44) 1276-686697 Atmel Rousset Zone Industrielle 13106 Rousset Cedex, France TEL (33) 4 42 53 60 00 FAX (33) 4 42 53 60 01 Asia Atmel Asia, Ltd. Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon, Hong Kong TEL (852) 27219778 FAX (852) 27221369 Japan Atmel Japan K.K. Tonetsu Shinkawa Bldg., 9F 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL (81) 3-3523-3551 FAX (81) 3-3523-7581 Fax-on-Demand North America: 1-(800) 292-8635 International: 1-(408) 441-0732 literature@atmel.com Web Site http://www.atmel.com BBS 1-(408) 436-4309 (c) Atmel Corporation 1998. Atmel Cor poration makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in Atmel's Terms and Conditions located on the Company's website. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual proper ty of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel's products are not authorized for use as critical components in life suppor t devices or systems. Marks bearing (R) and/or TM are registered trademarks and trademarks of Atmel Corporation. Printed on recycled paper. 0014H-07/98/xM Terms and product names in this document may be trademarks of others. |
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