Cypress CY7B9910, CY7B9920 manual Electrical Characteristics Over the Operating Range

CY7B9910

CY7B9920

Electrical Characteristics Over the Operating Range

					CY7B9910		CY7B9920
Parameter	Description		Test Conditions						Unit
					Min	Max	Min	Max
VOH	Output HIGH Voltage	VCC = Min, IOH = –16 mA			2.4				V
		VCC = Min, IOH =–40 mA					VCC–0.75
VOL	Output LOW Voltage	VCC = Min, IOL = 46 mA				0.45			V
		VCC = Min, IOL = 46 mA						0.45
VIH	Input HIGH Voltage				2.0	VCC	VCC –	VCC	V
	(REF and FB inputs only)						1.35
VIL	Input LOW Voltage				–0.5	0.8	–0.5	1.35	V
	(REF and FB inputs only)
VIHH	Three Level Input HIGH	Min ≤ VCC ≤ Max			VCC – 1V	VCC	VCC – 1V	VCC	V
	Voltage (Test, FS)[4]
VIMM	Three Level Input MID	Min ≤ VCC ≤ Max			VCC/2 –	VCC/2 +	VCC/2 –	VCC/2 +	V
	Voltage (Test, FS)[4]				500 mV	500 mV	500 mV	500 mV
VILL	Three Level Input LOW	Min ≤ VCC ≤ Max			0.0	1.0	0.0	1.0	V
	Voltage (Test, FS)[4]
IIH	Input HIGH Leakage Current	VCC = Max, VIN = Max				10		10	μA
	(REF and FB inputs only)
IIL	Input LOW Leakage Current	VCC = Max, VIN = 0.4V			–500		–500		μA
	(REF and FB inputs only)
IIHH	Input HIGH Current	VIN = VCC				200		200	μA
	(Test, FS)
IIMM	Input MID Current	VIN = VCC/2			–50	50	–50	50	μA
	(Test, FS)
IILL	Input LOW Current	VIN = GND				–200		–200	μA
	(Test, FS)
IOS	Output Short Circuit	VCC	= Max, VOUT			–250		N/A	mA
	Current[5]	= GND (25°C only)
ICCQ	Operating Current Used by	VCCN = VCCQ = Max All		Com’l		85		85	mA
	Internal Circuitry	Input
				Mil/Ind		90		90
		Selects Open
ICCN	Output Buffer Current per	VCCN = VCCQ = Max				14		19	mA
	Output Pair[6]	I	= 0 mA
		OUT
		Input Selects Open, fMAX						104[5]
PD	Power Dissipation per	VCCN = VCCQ = Max				78			mW
	Output Pair[7]	I	= 0 mA
		OUT
		Input Selects Open, fMAX
Notes

4.These inputs are normally wired to VCC, GND, or left unconnected (actual threshold voltages vary as a percentage of VCC). Internal termination resistors hold unconnected inputs at VCC/2. If these inputs are switched, the function and timing of the outputs may glitch and the PLL may require an additional tLOCK time before all data sheet limits are achieved.

5.Tested one output at a time, output shorted for less than one second, less than 10% duty cycle. Room temperature only. CY7B9920 outputs are not short circuit protected.

6.Total output current per output pair is approximated by the following expression that includes device current plus load current: CY7B9910:

ICCN = [(4 + 0.11F) + [((835 – 3F)/Z) + (.0022FC)]N] x 1.1 CY7B9920:

ICCN = [(3.5+.17F) + [((1160 – 2.8F)/Z) + (.0025FC)]N] x 1.1 Where

F = frequency in MHz

C = capacitive load in pF

Z = line impedance in ohms

N = number of loaded outputs; 0, 1, or 2 FC = F < C.

7.Total power dissipation per output pair is approximated by the following expression that includes device power dissipation plus power dissipation due to the load circuit: CY7B9910:

PD = [(22 + 0.61F) + [((1550 – 2.7F)/Z) + (.0125FC)]N] x 1.1 CY7B9920:

PD = [(19.25+ 0.94F) + [((700 + 6F)/Z) + (.017FC)]N] x 1.1.See note 3 for variable definition.

Document Number: 38-07135 Rev. *B Page 4 of 11

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