max. Active 20-Lead TSSOP Package 20-Lead SOIC Package 28-Lead TSOP Pa

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max. Active 20-Lead TSSOP Package 20-Lead SOIC Package 28-Lead TSOP Pa

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8-Bit Multiplexed Addresses/Outputs Fast Read Access Time Power CMOS Operation
max. Active 20-Lead TSSOP Package 20-Lead SOIC Package 28-Lead TSOP Package Supply High Reliability CMOS Technology 2,000V Protection Latchup Immunity RapidProgramming Algorithm µs/byte (typical) CMOS Compatible Inputs Outputs Integrated Product Identification Code Commercial Industrial Temperature Range
AT27C520 low-power, high performance 524,288 one-time programmable read only memory (OTP EPROM) organized bits. incorporates latches lower order address bits multiplex with data bits. This minimizes system chip count, reduces cost, simplifies design multiplexed systems. requires only power supply normal read mode operation. byte accessed less than eliminating need speed reducing WAIT states high performance microprocessor systems. Atmel's scaled CMOS technology provides high speed, lower active power consumption, significantly faster programming. Power consumption typically only Active Mode. AT27C520 available mil, 20-pin TSSOP; mil, 20-pin SOIC; 28pin TSOP, one-time programmable (OTP) plastic packages. (continued)
512K (64K Multiplexed Addresses/ Outputs EPROM AT27C520
Configurations
Name /VPP Function Addresses Addresses/Outputs Output Enable/VPP Address Latch Enable TSOP View
OE/VPP
TSSOP View
OE/VPP
SOIC View
OE/VPP
Rev. 0752C-C-01/98
With byte storage capability, AT27C520 allows firmware stored reliably accessed system without delays mass storage media. Atmel's 27C520 additional features ensure high quality efficient production use. RapidProgramming Algorithm reduces time required program part guarantees reliable programming. Programming time typically only µs/byte. Integrated Product Identification Code electronically identifies device manufacturer. This feature used industry standard programming equipment select proper programming algorithms voltages.
System Considerations
Switching under active conditions produce transient voltage excursions. Unless accommodated system design, these transients exceed data sheet limits, resulting device non-conformance. minimum, high frequency, inherent inductance, ceramic capacitor should utilized each device. This capacitor should connected between Ground terminals device, close device possible. Additionally, stabilize supply voltage level printed circuit boards with large EPROM arrays, bulk electrolytic capacitor should utilized, again connected between Ground terminals. This capacitor should positioned close possible point where power supply connected array.
Block Diagram
OE/VPP ALE, PROGRAM LOGIC OUTPUT BUFFERS
LATCHES
DECODER
Y-GATING
DECODER
CELL MATRIX
IDENTIFICATION
AT27C520
AT27C520
Absolute Maximum Ratings*
Temperature Under Bias -55°C +125°C Storage Temperature -65°C +150°C Voltage with Respect Ground .-2.0V +7.0V(1) Voltage with Respect Ground .-2.0V +14.0V(1) Note: Supply Voltage with Respect Ground .-2.0V +14.0V(1) *NOTICE: Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. This stress rating only functional operation device these other conditions beyond those indicated operational sections this specification implied. Exposure absolute maximum rating conditions extended periods affect device reliability. Minimum voltage -0.6V which undershoot -2.0V pulses less than Maximum output voltage 0.75V which overshoot +7.0V pulses less than
Operating Modes
Mode/Pin Read Output Disable Address Latch Enable Rapid Program
VIL/VIH
OE/VPP
DOUT High Z/A0 Identification Code
VH(4)
Product Identification
Notes:
VIH. Refer Programming Characteristics. 12.0 0.5V. identifier bytes selected. inputs held (VIL), except which which toggled (VIL) select Manufacturer's Identification byte high (VIH) select Device Code byte.
Operating Conditions Read Operation
AT27C520 Operating Temp.(Case) Supply Com. Ind. 70°C -40°C 85°C 70°C -40°C 85°C
Operating Characteristics Read Operation
Symbol ILI2
Note:
Parameter Input Load Current Input Load Current Output Leakage Current Active Current Input Voltage Input High Voltage Output Voltage Output High Voltage
Condition VOUT MHz, IOUT
±100
Units
-0.6 -400
address input only.
Characteristics Read Operation
AT27C520 Symbol tACC(2) tALE tOE(2) tDF(3)(4) Notes: Parameter Address Output Delay Address Setup Time Address Hold Time Address Latch Enable Width OE/VPP Output Delay OE/VPP High Output Float Output Hold from Address OE/VPP whichever occurred first Condition OE/VPP OE/VPP OE/VPP OE/VPP
Units
Waveforms Read Operation
AT27C520
AT27C520
Waveforms Read Operation(1)
tALE
OE/VPP ADDRESS tACC
Notes: Timing measurement reference levels speed grades 0.8V 2.0V. Input drive levels 0.45V 2.4V. OE/VPP delayed tACC after address valid without impact tACC. This parameter only sampled 100% tested. Output float defined point when data longer driven.
DATA
Input Test Waveforms Measurement Levels
devices:
Output Test Load
(10% 90%)
Note: including capacitance.
Capacitance MHz, 25°C)(1)
COUT
Note:
Units
Conditions VOUT
Typical values nominal supply voltage. This parameter only sampled 100% tested.
Programming Waveforms
PROGRAM 6.5V 5.0V tVCS OE/VPP tPRT tALE tLAS ADDR ADDRESS STABLE tLAH DATA tALE tLAS ADDR tLAH DATA tDFP tOES tOEH READ (VERIFY)
Notes:
Input Timing Reference 0.8V 2.0V VIH. tDFP characteristics device must accommodated programmer.
Programming Characteristics
5°C, 0.25V, OE/VPP 13.0 0.25V Limits Symbol ILI2
Parameter Input Load Current Input Load Current Input Level Input High Level Output Voltage Output High Voltage Supply Current (Program Verify) OE/VPP Current
Test Conditions VIL, VIL,
±100
Units
ICC2 IPP2
Note:
-0.6 -400
address input only.
AT27C520
AT27C520
Programming Characteristics
5°C, 0.25V, OE/VPP 13.0 0.25V
Limits Symbol tALE tLAS tLAH tOES tOEH tVCS tDFP tPRT Notes: Parameter
Test Conditions
Units
Address Latch Enable Width Latched Address Setup Time Latched Address Hold Time OE/VPP High Voltage Delay OE/VPP Setup Time OE/VPP Hold Time Data Setup Time Data Hold Time Program Pulse Width(2) OE/VPP Recovery Time Setup Time Data Valid from OE/VPP OE/VPP High Output Float Delay(3) Address Setup Time Address Hold Time OE/VPP Pulse Rise Time During Programming
Input Rise Fall Times (10% 90%) Input Pulse Levels 0.45V 2.4V Input Timing Reference Level 0.8V 2.0V Output Timing Reference Level 0.8V 2.0V
47.5 52.5
must applied simultaneously before OE/VPP removed simultaneously after OE/VPP Program Pulse width tolerance µsec This parameter only sampled 100% tested. Output Float defined point where data longer driven timing diagram.
Atmel's 27C520 Integrated Product Identification Code
Pins Codes Manufacturer Device Type Data
RapidProgramming Algorithm
pulse width used program. address first location. raised 6.5V OE/VPP raised 13.0V. Each address first programmed with pulse without verification. Then verification/reprogramming loop executed each address. event byte fails pass verification, successive pulses applied with verification after each pulse. byte fails verify after pulses have been applied, part considered failed. After byte verifies properly, next address selected until have been checked. OE/VPP then lowered 5.0V. bytes read again compared with original data determine device passes fails.
START
ADDR FIRST LOCATION 6.5V 13.0V PROGRAM PULSE
INCREMENT ADDRESS
LAST ADDR.?
ADDR FIRST LOCATION INCREMENT ADDRESS LAST ADDR.? PROGRAM PULSE PASS VERIFY BYTE FAIL INCREMENT
5.0V 5.0V
COMPARE BYTES ORIGINAL DATA
FAIL
DEVICE FAILED
PASS DEVICE PASSED
AT27C520
AT27C520
Ordering Information
tACC (ns) (mA) Active Ordering Code AT27C520-70SC AT27C520-70TC AT27C520-70XC AT27C520-70SI AT27C520-70TI AT27C520-70XI AT27C520-90SC AT27C520-90TC AT27C520-90XC AT27C520-90SI AT27C520-90TI AT27C520-90XI Package Operation Range Commercial (0°C 70°C) Industrial (-40°C 85°C) Commercial (0°C 70°C) Industrial (-40°C 85°C)
Package Type 20-Lead, 0.300" Wide, Plastic Gull-Wing Small Outline (SOIC) 28-Lead, Thin Small Outline Package (TSOP) 20-Lead, 0.173" Wide, Thin Shrink Small Outline (TSSOP)
Packaging Information
20S, 20-Lead, 0.300" Wide, Plastic Gull Wing Small Outline Dimensions Inches (Millimeters) 28T, 28-Lead, Plastic Thin Small Outline Package (TSOP) Dimensions Millimeters (Inches)
.020(.508) .013(.330)
.299(7.60) .420(10.7) .291(7.39) .393(9.98)
.050(1.27) .513(13.0) .497(12.6)
.105(2.67) .092(2.34)
.012(.305) .003(.076)
.013(.330) .009(.229) .035(0.889) .015(.381)
20X, 20-Lead, 0.173" Wide, Thin Super Small Outline Package (TSSOP) Dimensions (Millimeters) Inches
0.30(0.012) 0.18(0.007)
4.48(.176) 6.50(.256) 4.30(.169) 6.25(.246)
0.65(.0256) 6.60(.260) 6.40(.252)
1.10(0.043)
0.15(.006) 0.05(.002)
0.18(.007) 0.09(.003) 0.70(.028) 0.50(.020)
AT27C520

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