ATF1502AS Просмотр технического описания (PDF) - Atmel Corporation

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ATF1502AS

High Performance E2PROM CPLD

Atmel Corporation 

Power-down

Mode

The ATF1502AS includes an optional pin-controlled power-down feature. When this mode is

enabled, the PD pin acts as the power-down pin. When the PD pin is high, the device supply

current is reduced to less than 5 mA. During power-down, all output data and internal logic

states are latched and held. Therefore, all registered and combinatorial output data remain

valid. Any outputs that were in a high-Z state at the onset will remain at high-Z. During

power-down, all input signals except the power-down pin are blocked. Input and I/O hold

latches remain active to ensure that pins do not float to indeterminate levels, further reducing

system power. The power-down pin feature is enabled in the logic design file. Designs using

the power-down pin may not use the PD pin logic array input. However, all other PD pin mac-

rocell resources may still be used, including the buried feedback and foldback product term

array inputs.

Power-down AC Characteristics(1)(2)

Symbol Parameter

tIVDH

Valid I, I/O before PD High

tGVDH

Valid OE(2) before PD High

tCVDH

Valid Clock(2) before PD High

tDHIX

I, I/O Don’t Care after PD High

tDHGX

OE(2) Don’t Care after PD High

tDHCX

Clock(2) Don’t Care after PD High

tDLIV

PD Low to Valid I, I/O

tDLGV

PD Low to Valid OE (Pin or Term)

tDLCV

PD Low to Valid Clock (Pin or Term)

tDLOV

PD Low to Valid Output

Notes: 1. For slow slew outputs, add tSSO.

2. Pin or product term.

-7

Min Max

7

7

7

12

12

12

1

1

1

1

-10

Min Max

10

10

10

15

15

15

1

1

1

1

-15

Min Max

15

15

15

25

25

25

1

1

1

1

-25

Min Max

25

25

25

35

35

35

1

1

1

1

Units

ns

ns

ns

ns

ns

ns

µs

µs

µs

µs

Absolute Maximum Ratings*

Temperature Under Bias.................................. -40°C to +85°C

Storage Temperature ..................................... -65°C to +150°C

Voltage on Any Pin with

Respect to Ground .........................................-2.0V to +7.0V(1)

Voltage on Input Pins

with Respect to Ground

During Programming.....................................-2.0V to +14.0V(1)

Programming Voltage with

Respect to Ground .......................................-2.0V to +14.0V(1)

*NOTICE:

Stresses beyond those listed under “Absolute

Maximum Ratings” may cause permanent dam-

age 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.

Note:

1. Minimum voltage is -0.6V DC, which may under-

shoot to -2.0V for pulses of less than 20 ns.

Maximum output pin voltage is VCC + 0.75V DC,

which may overshoot to 7.0V for pulses of less

than 20 ns.

12 ATF1502AS(L)

0995K–PLD–6/05

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