ATT3042 查看數據表（PDF） - Unspecified

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ATT3042

Field-Programmable Gate Arrays

Unspecified 

Data Sheet

February 1997

ATT3000 Series Field-Programmable Gate Arrays

Electrical Characteristics (continued)

Table 24. Buffer (Internal) Switching Characteristics

Commercial: VCC = 5.0 V ± 5%; 0 °C ≤ TA ≤ 70 °C; Industrial: VCC = 5.0 ± 10%, –40 °C ≤ TA ≤ +85 °C.

Description

Global and Alternate Clock Distribution*:

Either Normal IOB Input Pad to

Clock Buffer Input or

Fast (CMOS only) Input Pad to

Clock Buffer Input

TBUF Driving a Horizontal Long Line (LL)*:

I to LL While T Is Low (buffer active)

T↓ to LL Active and Valid with

Single Pull-up Resistor

T↓ to LL Active and Valid with

Pair of Pull-up Resistors

T↑ to LL High with Single Pull-up

Resistor

T↑ to LL High with Pair of Pull-up

Resistors

Bidirectional Buffer Delay

-50 -70 -100 -125

Symbol

Max Max Max Max

TPID 10.0 8.0 7.5 7.0

TPIDC 8.0 6.5 6.0 5.7

TIO 8.0 5.0 4.7 4.5

TON 12.0 11.0 10.0 9.0

TON 14.0 12.0 11.0 10.0

TPUS 42.0 24.0 22.0 17.0

TPUF 22.0 17.0 15.0 12.0

TBIDI 6.0 2.0 1.8 1.7

* Timing is based on the ATT3042; for other devices, see timing calculator in ORCA Foundry.

-5

Max

6.8

5.4

4.1

5.6

7.1

15.6

12.0

1.4

-4

Max

6.5

5.1

3.7

5.0

6.5

13.5

10.5

1.2

-3

Unit

Max

5.6 ns

4.3 ns

3.1 ns

4.2 ns

5.7 ns

11.4 ns

8.8 ns

1.0 ns

Lucent Technologies Inc.

61

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