Digi NS7520 manual Sram timing parameters, Num Description Min Max Unit

E l e c t r i c a l C h a r a c t e r i s t i c s

SRAM timing

BCLK max frequency: 55.296 MHz

Operating conditions:

Temperature:	-15.00 (min)	110.00 (max)
Voltage:	1.60 (min)	1.40 (max)
Output load:	25.0pf
Input drive:	CMOS buffer

SRAM timing parameters

Num	Description	Min	Max	Unit
36	BCLK high to BE* valid		15.5	ns
6	BCLK high to address valid	5	13.5	ns
9	BCLK high to data out valid		14	ns
13	BCLK high to data out high impedance		13	ns
10	Data in valid to BCLK high (setup)	5		ns
11	BCLK high to data in invalid (hold)	3		ns
14	TA* valid to BCLK high (setup)	5		ns
15	BCLK high to TA* invalid (hold)	3		ns
27	BCLK high to CS* valid		12.5	ns
28	BCLK low to OE* valid		12.5	ns
29	BCLK low to WE* valid		13	ns
30	BCLK high to TA* valid		13.5	ns
31	BCLK high to TEA* valid		16	ns
18	BCLK low to A27 (CS0OE*) valid		13.5	ns
19	BCLK low A26 (CS0WE*) valid		13.5	ns
12	BCLK high to RW* valid		13.5	ns

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