CY7B9910
CY7B9920
3
I
ILL
Input LOW Current
(Test, FS)
V
IN
= GND –200 –200
µA
I
OS
Output Short Circuit
Current
[2]
V
CC
= Max., V
OUT
= GND (25
°
C only)
–250 N/A mA
I
CCQ
Operating Current Used by
Internal Circuitry
V
CCN
= V
CCQ
= Max.,
All Input
Selects Open
Com’l 85 85 mA
Mil/Ind 90 90
I
CCN
Output Buffer Current per
Output Pair
[3]
V
CCN
= V
CCQ
= Max.,
I
OUT
= 0 mA
Input Selects Open, f
MAX
14 19 mA
PD Power Dissipation per
Output Pair
[4]
V
CCN
= V
CCQ
= Max.,
I
OUT
= 0 mA
Input Selects Open, f
MAX
78 104
[5]
mW
Electrical Characteristics
Over the Operating Range (continued)
CY7B9910 CY7B9920
Parameter Description Test Conditions Min. Max. Min. Max. Unit
Capacitance
[6]
Parameter Description Test Conditions Max. Unit
C
IN
Input Capacitance T
A
= 25
°
C, f = 1 MHz, V
CC
= 5.0V 10 pF
Notes:
1. These inputs are normally wired to V
CC
, GND, or left unconnected (actual threshold voltages vary as a percentage of V
CC
). Internal termination resistors hold unconnected
inputs at V
CC
/2. If these inputs are switched, the function and timing of the outputs may glitch and the PLL may require an additional t
LOCK
time before all data sheet limits are
achieved.
2. 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.
3. Total output current per output pair can be approximated by the following expression that includes device current plus load current:
CY7B9910:
I
CCN
= [(4 + 0.11F) + [((835 – 3F)/Z) + (.0022FC)]N] x 1.1
CY7B9920:
I
CCN
= [(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
4. Total power dissipation per output pair can be 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.
5. CMOS output buffer current and power dissipation specified at 50-MHz reference frequency.
6. Applies to REF and FB inputs only. Tested initially and after any design or process changes that may affect these parameters.
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