AT27C256R-90JC Ver la hoja de datos (PDF) - Atmel Corporation

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AT27C256R-90JC

256K (32K x 8) OTP CMOS EPROM

Atmel Corporation 

DC and AC Operating Conditions for Read Operation

Operating

Temp. (Case)

VCC Supply

-45

Com. 0°C - 70°C

Ind. -40°C - 85°C

5V ± 10%

-55

0°C - 70°C

-40°C - 85°C

5V ± 10%

AT27C256R

-70

-90

0°C - 70°C 0°C - 70°C

-40°C - 85°C -40°C - 85°C

5V ± 10%

5V ± 10%

-12

0°C - 70°C

-40°C - 85°C

5V ± 10%

-15

0°C - 70°C

-40°C - 85°C

5V ± 10%

DC and Operating Characteristics for Read Operation

Symbol Parameter

Condition

Min

Max Units

ILI

ILO

IPP1 (2)

Input Load Current

VIN = 0V to VCC

Output Leakage Current

VOUT = 0V to VCC

VPP (1) Read/Standby Current VPP = VCC

±1

µA

±5

µA

10

µA

ISB

VCC (1) Standby Current

ISB1 (CMOS), CE = VCC ± 0.3V

ISB2 (TTL), CE = 2.0 to VCC + 0.5V

100

µA

1

mA

ICC

VCC Active Current

VIL

Input Low Voltage

VIH

Input High Voltage

VOL

Output Low Voltage

VOH

Output High Voltage

f = 5 MHz, IOUT = 0 mA,

CE = VIL

IOL = 2.1 mA

IOH = -400 µA

20

mA

-0.6

0.8

V

2.0 VCC + 0.5 V

0.4

V

2.4

V

Notes: 1. VCC must be applied simultaneously or before VPP, 2. VPP may be connected directly to VCC, except during program-

and removed simultaneously or after VPP.

ming. The supply current would then be the sum of ICC and IPP.

AC Characteristics for Read Operation

AT27C256R

-45

-55

-70

-90

-12

-15

Symbol Parameter

Condition

Min Max Min Max Min Max Min Max Min Max Min Max Units

tACC (3)

tCE (2)

tOE (2, 3)

tDF (4, 5)

tOH

Address to

Output Delay

CE = OE

= VIL

CE to Output Delay OE = VIL

OE to Output Delay CE = VIL

OE or CE High to

Output Float, whichever occurred first

Output Hold from

Address, CE or OE,

whichever occurred first

45

55

45

55

20

25

20

20

70

90

120

150 ns

70

90

120

150 ns

30

30

35

40 ns

25

25

30

35 ns

7

7

7

0

0

0

ns

Notes: 2, 3, 4, 5. - see AC Waveforms for Read Operation.

3-128

AT27C256R

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