Cypress CY7C6431x, CY7C64345, CY7C6435x manual 160 175

CY7C6431x

CY7C64345, CY7C6435x

Table 15.AC Characteristics – USB Data Timings

Symbol		Description	Conditions	Min	Typ	Max	Units
Tdrate		Full speed data rate	Average bit rate	9	12	15	MHz
Tdjr1		Receiver data jitter tolerance	To next transition	-18.5	–	18.5	ns
Tdjr2		Receiver data jitter tolerance	To pair transition	-9	–	9	ns
Tudj1		Driver differential jitter	To next transition	-3.5	–	3.5	ns
Tudj2		Driver differential jitter	To pair transition	-4.0	–	4.0	ns
Tfdeop		Source jitter for differential transition	To SE0 transition	-2	–	5	ns
Tfeopt		Source SE0 interval of EOP		160	–	175	ns
Tfeopr		Receiver SE0 interval of EOP		82	–		ns
Tfst		Width of SE0 interval during differential			–	14	ns
		transition
Table 16.AC Characteristics – USB Driver
Symbol		Description	Conditions	Min	Typ	Max	Units
Tr	Transition rise time		50 pF	4	–	20	ns
Tf	Transition fall time		50 pF	4	–	20	ns
TR	Rise/fall time matching			90.00	–	111.1	%
Vcrs	Output signal crossover voltage			1.3	–	2.0	V

Document Number: 001-12394 Rev *G Page 19 of 28

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