CY7B9910
CY7B9920
Electrical Characteristics
Over the Operating Range
CY7B9910
CY7B9920
Parameter
Description
Test Conditions
VCC = Min, IOH = –16 mA
VCC = Min, IOH =–40 mA
VCC = Min, IOL = 46 mA
VCC = Min, IOL = 46 mA
Min
Max
Min
Max
Unit
VOH
Output HIGH Voltage
2.4
V
VCC–0.75
VOL
Output LOW Voltage
0.45
V
0.45
VCC
VIH
VIL
Input HIGH Voltage
(REF and FB inputs only)
2.0
–0.5
VCC
0.8
VCC
–
V
V
1.35
Input LOW Voltage
(REF and FB inputs only)
–0.5
1.35
VCC
VIHH
VIMM
VILL
IIH
Three Level Input HIGH
Voltage (Test, FS)[4]
Min ≤ VCC ≤ Max
Min ≤ VCC ≤ Max
Min ≤ VCC ≤ Max
VCC – 1V
VCC
VCC – 1V
V
Three Level Input MID
Voltage (Test, FS)[4]
VCC/2 – VCC/2 +
500 mV
VCC/2 –
500 mV
VCC/2 +
500 mV
V
500 mV
Three Level Input LOW
Voltage (Test, FS)[4]
0.0
1.0
0.0
–500
–50
1.0
V
Input HIGH Leakage Current VCC = Max, VIN = Max
(REF and FB inputs only)
10
10
μA
μA
μA
μA
μA
mA
mA
IIL
Input LOW Leakage Current VCC = Max, VIN = 0.4V
(REF and FB inputs only)
–500
–50
IIHH
IIMM
IILL
Input HIGH Current
(Test, FS)
VIN = VCC
VIN = VCC/2
VIN = GND
200
50
200
50
Input MID Current
(Test, FS)
Input LOW Current
(Test, FS)
–200
–250
–200
N/A
IOS
Output Short Circuit
Current[5]
VCC = Max, VOUT
= GND (25°C only)
VCCN = VCCQ = Max All Com’l
ICCQ
Operating Current Used by
Internal Circuitry
85
90
85
90
Input
Selects Open
Mil/Ind
ICCN
Output Buffer Current per
Output Pair[6]
VCCN = VCCQ = Max
14
19
mA
IOUT = 0 mA
Input Selects Open, fMAX
PD
Power Dissipation per
Output Pair[7]
VCCN = VCCQ = Max
78
104[5]
mW
IOUT = 0 mA
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 datasheet 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. *D
Page 4 of 11
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