Xilinx DS610 manual QuietIO 27.67

DC and Switching Characteristics

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Table 24: Output Timing Adjustments for IOB

			Add the
			Adjustment
Convert Output Time from			Below
LVCMOS25 with 12mA Drive and
			Speed Grade
Fast Slew Rate to the Following
Signal Standard (IOSTANDARD)			-5	-4	Units
Single-Ended Standards
LVTTL	Slow	2 mA	5.58	5.58	ns
		4 mA	3.16	3.16	ns
		6 mA	3.17	3.17	ns
		8 mA	2.09	2.09	ns
		12 mA	1.62	1.62	ns
		16 mA	1.24	1.24	ns
		24 mA	2.74	2.74	ns
	Fast	2 mA	3.03	3.03	ns
		4 mA	1.71	1.71	ns
		6 mA	1.71	1.71	ns
		8 mA	0.53	0.53	ns
		12 mA	0.53	0.53	ns
		16 mA	0.59	0.59	ns
		24 mA	0.60	0.60	ns
	QuietIO	2 mA	27.67	27.67	ns
		4 mA	27.67	27.67	ns
		6 mA	27.67	27.67	ns
		8 mA	16.71	16.71	ns
		12 mA	16.67	16.67	ns
		16 mA	16.22	16.22	ns
		24 mA	12.11	12.11	ns

Table 24: Output Timing Adjustments for IOB (Continued)

			Add the
			Adjustment
Convert Output Time from			Below
LVCMOS25 with 12mA Drive and
			Speed Grade
Fast Slew Rate to the Following
Signal Standard (IOSTANDARD)			-5	-4	Units
LVCMOS33	Slow	2 mA	5.58	5.58	ns
		4 mA	3.17	3.17	ns
		6 mA	3.17	3.17	ns
		8 mA	2.09	2.09	ns
		12 mA	1.24	1.24	ns
		16 mA	1.15	1.15	ns
		24 mA	2.55	2.55	ns
	Fast	2 mA	3.02	3.02	ns
		4 mA	1.71	1.71	ns
		6 mA	1.72	1.72	ns
		8 mA	0.53	0.53	ns
		12 mA	0.59	0.59	ns
		16 mA	0.59	0.59	ns
		24 mA	0.51	0.51	ns
	QuietIO	2 mA	27.67	27.67	ns
		4 mA	27.67	27.67	ns
		6 mA	27.67	27.67	ns
		8 mA	16.71	16.71	ns
		12 mA	16.29	16.29	ns
		16 mA	16.18	16.18	ns
		24 mA	12.11	12.11	ns

28	www.xilinx.com	DS610-3 (v2.0) July 16, 2007
		Product Specification