OR2C04A datasheet(153/192 Pages) ETC

153 / 192 page

Data Sheet

June 1999

ORCA Series 2 FPGAs

Lucent Technologies Inc.

153

Timing Characteristics (continued)

Notes:

The pin-to-pin timing information from

ORCA Foundry version 9.2 and later is more accurate than this table. For earlier versions of ORCA Foundry,

the pin-to-pin timing parameters in this table should be used instead of results reported by

ORCA Foundry.

This clock delay is for a fully routed clock tree that uses the primary clock network. It includes both the input buffer delay, the clock routing to the

PFU CLK input, the clock

→Q of the FF, and the delay through the output buffer. The delay will be reduced if any of the clock branches are not

used. The given timing requires that the input clock pin be located at one of the four center PICs on any side of the device and that the direct

→I/O routing be used.

If the clock pin is not located at one of the four center PICs, this delay must be increased by up to the following amounts:

OR2T15B = 5.7%, OR2T40B = 12.5%.

Figure 63. Global Clock to Output Delay

Table 44B. OR2TxxB Global Clock to Output Delay (Pin-to-Pin)—Output Not on Same Side of the Device as

the Clock Pin

OR2TxxB Commercial: VDD = 3.0 V to 3.6 V, 0 °C

≤ TA ≤ 70 °C;

Industrial: VDD = 3.0 V to 3.6 V, –40 °C

≤ TA ≤ +85 °C; CL = 50 pF.

Description

(TJ = 85 °C, VDD = min)

Device

Speed

Unit

-7

-8

MinMax

CLK Input Pin

→ OUTPUT Pin

(Fast)

OR2T15B

OR2T40B

—

7.6

8.1

—

6.9

7.4

CLK Input Pin

→ OUTPUT Pin

(Slewlim)

OR2T15B

OR2T40B

—

8.4

9.0

—

7.7

8.2

CLK Input Pin

→ OUTPUT Pin

(Sinklim)

OR2T15B

OR2T40B

—

13.2

13.7

—

12.4

12.8

OUTPUT (50 pF LOAD)

CLK

5-4846(F)

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