Xilinx DS610 manual General DC Characteristics for I/O Pins, = Gnd

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DC and Switching Characteristics

General DC Characteristics for I/O Pins

Table 8: General DC Characteristics of User I/O, Dual-Purpose, and Dedicated Pins

Symbol	Description	Test Conditions		Min	Typ	Max	Units
IL	Leakage current at User I/O,	Driver is in a high-impedance state,		–10	-	+10	μA
	Input-only, Dual-Purpose, and	VIN = 0V or VCCO max, sample-tested
	Dedicated pins, FPGA powered
IHS	Leakage current on pins during	All pins except INIT_B, PROG_B, DONE, and JTAG pins		–10	-	+10	μA
	hot socketing, FPGA unpowered	when PUDC_B = 1.
		INIT_B, PROG_B, DONE, and JTAG pins or other pins		Add IHS + IRPU			μA
		when PUDC_B = 0.
IRPU(2)	Current through pull-up resistor	VIN = GND	VCCO or VCCAUX = 3.0V to 3.6V	–151	–315	–710	μA
	at User I/O, Dual-Purpose,
			VCCO or VCCAUX = 2.3V to 2.7V	–82	–182	–437	μA
	Input-only, and Dedicated pins.
	Dedicated pins are powered by
			VCCO = 1.7V to 1.9V	–36	–88	–226	μA
	VCCAUX.
			VCCO = 1.4V to 1.6V	–22	–56	–148	μA
			VCCO = 1.14V to 1.26V	–11	–31	–83	μA
RPU(2)	Equivalent pull-up resistor value	VIN = GND	VCCO = 3.0V to 3.6V	5.1	11.4	23.9	kΩ
	at User I/O, Dual-Purpose,
			VCCO = 2.3V to 2.7V	6.2	14.8	33.1	kΩ
	Input-only, and Dedicated pins
	(based on IRPU per Note 2)
			VCCO = 1.7V to 1.9V	8.4	21.6	52.6	kΩ
			VCCO = 1.4V to 1.6V	10.8	28.4	74.0	kΩ
			VCCO = 1.14V to 1.26V	15.3	41.1	119.4	kΩ
IRPD(2)	Current through pull-down	VIN = VCCO	VCCAUX = 3.0V to 3.6V	167	346	659	μA
	resistor at User I/O,
			VCCAUX = 2.25V to 2.75V
	Dual-Purpose, Input-only, and			100	225	457	μA
	Dedicated pins
RPD(2)	Equivalent pull-down resistor	VCCAUX = 3.0V to 3.6V	VIN = 3.0V to 3.6V	5.5	10.4	20.8	kΩ
	value at User I/O, Dual-Purpose,
			VIN = 2.3V to 2.7V	4.1	7.8	15.7	kΩ
	Input-only, and Dedicated pins
	(based on IRPD per Note 2)
			VIN = 1.7V to 1.9V	3.0	5.7	11.1	kΩ
			VIN = 1.4V to 1.6V	2.7	5.1	9.6	kΩ
			VIN = 1.14V to 1.26V	2.4	4.5	8.1	kΩ
		VCCAUX = 2.25V to 2.75V	VIN = 3.0V to 3.6V	7.9	16.0	35.0	kΩ
			VIN = 2.3V to 2.7V	5.9	12.0	26.3	kΩ
			VIN = 1.7V to 1.9V	4.2	8.5	18.6	kΩ
			VIN = 1.4V to 1.6V	3.6	7.2	15.7	kΩ
			VIN = 1.14V to 1.26V	3.0	6.0	12.5	kΩ
IREF	VREF current per pin	All VCCO levels		–10	-	+10	μA
CIN	Input capacitance		-	3	-	10	pF
RDT	Resistance of optional differential	VCCO = 3.3V ± 10%	LVDS_33, MINI_LVDS_33,	90	100	115	Ω
	termination circuit within a		RSDS_33
	differential I/O pair. Not available
	on Input-only pairs.	VCCO = 2.5V ± 10%	LVDS_25, MINI_LVDS_25,	90	110	–	Ω
			RSDS_25

Notes:

1.The numbers in this table are based on the conditions set forth in Table 7.

2.This parameter is based on characterization. The pull-up resistance RPU = VCCO/IRPU. The pull-down resistance RPD = VIN / IRPD.

DS610-3 (v2.0) July 16, 2007 www.xilinx.com 13

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