GAL22V10D-25LS datasheet(13/23 Pages) LATTICE

Part #	GAL22V10D-25LS

Description	All Devices Discontinued

PDF	23 Pages

Scroll/Zoom	100%

Manufacturer	LATTICE [Lattice Semiconductor]

Direct Link	http://www.latticesemi.com

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13 / 23 page

Specifications GAL22V10

fmax with Internal Feedback 1/(tsu+tcf)

Note: f

max with external feedback is cal-

culated from measured tsu and tco.

fmax with External Feedback 1/(tsu+tco)

Note: t

cf is a calculated value, derived by sub-

tracting tsu from the period of fmax w/internal

feedback (tcf = 1/fmax - tsu). The value of tcf is

used primarily when calculating the delay from

clocking a register to a combinatorial output

(through registered feedback), as shown above.

For example, the timing from clock to a combi-

natorial output is equal to tcf + tpd.

fmax with No Feedback

Note: f

max with no feedback may be less

than 1/(twh + twl). This is to allow for a

clock duty cycle of other than 50%.

R EGI ST ER

L OGIC

AR R AY

tco

tsu

CL K

LOGIC

ARRAY

CLK

tsu + th

CLK

LOGIC

ARRAY

tcf

tpd

fmax Descriptions

GAL22V10D-25LS Datasheet(PDF) 13 Page - Lattice Semiconductor