Additional Package Parameter Guidelines

Spartan-7 FPGAs Data Sheet: DC and AC Switching Characteristics (DS189)

Document ID

DS189

Release Date

2022-10-31

Revision

1.10 English

The parameters in this section provide the necessary values for calculating timing budgets for Spartan-7 FPGA clock transmitter and receiver data-valid windows.

Table 49: Package Skew⁽¹⁾
Symbol	Description	Device	Package	Value	Units
T_PKGSKEW	Package skew.⁽²⁾	XC7S6	CPGA196	44	ps
			CSGA225	83	ps
			FTGB196	65	ps
		XC7S15	CPGA196	44	ps
			CSGA225	83	ps
			FTGB196	65	ps
		XC7S25	CSGA225	93	ps
			CSGA324	62	ps
			FTGB196	83	ps
		XC7S50	CSGA324	80	ps
			FGGA484	110	ps
			FTGB196	103	ps
		XC7S75	FGGA484	117	ps
		XC7S75	FGGA676	110	ps
		XC7S100	FGGA484	117	ps
		XC7S100	FGGA676	110	ps
		XA7S6	CPGA196	44	ps
		XA7S6	CSGA225	83	ps
		XA7S15	CPGA196	44	ps
		XA7S15	CSGA225	83	ps
		XA7S25	CSGA225	93	ps
		XA7S25	CSGA324	62	ps
		XA7S50	CSGA324	80	ps
		XA7S50	FGGA484	110	ps
		XA7S75	FGGA484	117	ps
		XA7S75	FGGA676	110	ps
		XC7S100	FGGA484	117	ps
		XC7S100	FGGA676	110	ps
Notes: 1.Package delay information is available for these device/package combinations. This information can be used to deskew the package. 2.These values represent the worst-case skew between any two SelectIO resources in the package: shortest delay to longest delay from die pad to ball.