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