Cypress CY7B9910 User Manual
CY7B9910
CY7B9920
CY7B9920
Document Number: 38-07135 Rev. *B
Page 4 of 11
Electrical Characteristics
Over the Operating Range
CY7B9910
CY7B9920
Parameter
Description
Test Conditions
Min
Max
Min
Max
Unit
V
OH
Output HIGH Voltage
V
CC
= Min, I
OH
= –16 mA
2.4
V
V
CC
= Min, I
OH
=–40 mA
V
CC
–0.75
V
OL
Output LOW Voltage
V
CC
= Min, I
OL
= 46 mA
0.45
V
V
CC
= Min, I
OL
= 46 mA
0.45
V
IH
Input HIGH Voltage
(REF and FB inputs only)
(REF and FB inputs only)
2.0
V
CC
V
CC
–
1.35
V
CC
V
V
IL
Input LOW Voltage
(REF and FB inputs only)
(REF and FB inputs only)
–0.5
0.8
–0.5
1.35
V
V
IHH
Three Level Input HIGH
Voltage (Test, FS)
Voltage (Test, FS)
Min
≤ V
CC
≤ Max
V
CC
– 1V
V
CC
V
CC
– 1V
V
CC
V
V
IMM
Three Level Input MID
Voltage (Test, FS)
Voltage (Test, FS)
Min
≤ V
CC
≤ Max
V
CC
/2 –
500 mV
V
CC
/2 +
500 mV
V
CC
/2 –
500 mV
V
CC
/2 +
500 mV
V
V
ILL
Three Level Input LOW
Voltage (Test, FS)
Voltage (Test, FS)
Min
≤ V
CC
≤ Max
0.0
1.0
0.0
1.0
V
I
IH
Input HIGH Leakage Current
(REF and FB inputs only)
(REF and FB inputs only)
V
CC
= Max, V
IN
= Max
10
10
μA
I
IL
Input LOW Leakage Current
(REF and FB inputs only)
(REF and FB inputs only)
V
CC
= Max, V
IN
= 0.4V
–500
–500
μA
I
IHH
Input HIGH Current
(Test, FS)
(Test, FS)
V
IN
= V
CC
200
200
μA
I
IMM
Input MID Current
(Test, FS)
(Test, FS)
V
IN
= V
CC
/2
–50
50
–50
50
μA
I
ILL
Input LOW Current
(Test, FS)
(Test, FS)
V
IN
= GND
–200
–200
μA
I
OS
Output Short Circuit
Current
Current
V
CC
= Max, V
OUT
= GND (25
°
C only)
–250
N/A
mA
I
CCQ
Operating Current Used by
Internal Circuitry
Internal Circuitry
V
CCN
= V
CCQ
= Max All
Input
Selects Open
Selects Open
Com’l
85
85
mA
Mil/Ind
90
90
I
CCN
Output Buffer Current per
Output Pair
Output Pair
V
CCN
= V
CCQ
= Max
I
OUT
= 0 mA
Input Selects Open, f
MAX
14
19
mA
PD
Power Dissipation per
Output Pair
Output Pair
V
CCN
= V
CCQ
= Max
I
OUT
= 0 mA
Input Selects Open, f
MAX
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.
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.
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
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