Reference frequency input. This input supplies the frequency and timing against which all functional
variations are measured.
PLL feedback input (typically connected to one of the eight outputs).
Three level frequency range select. The ranges are described in the switching characteristics
tables.
Three level select. See
TEST MODE.
Clock outputs.
No connect.
Power supply for output drivers.
Power supply for internal circuitry.
Ground.
Test Mode
The TEST input is a three level input. In normal system operation, this pin is connected to ground, allowing the CY7B9910 and
CY7B9920 to operate as described in
Block Diagram Description on page 1.
For testing purposes, any of the three level inputs can
have a removable jumper to ground or be tied LOW through a 100
resistor. This enables an external tester to change the state of
these pins.
If the TEST input is forced to its MID or HIGH state, the device operates with its internal phase locked loop disconnected and input
levels supplied to REF directly control all outputs. Relative output-to-output functions are the same as in normal mode.
Notes
1. When the FS pin is selected HIGH, the REF input must not transition upon power up until V
CC
reached 4.3 V.
2. The level to be set on FS is determined by the “normal” operating frequency (f
NOM
) of the VCO (see
Logic Block Diagram).
The frequency appearing at the REF and
FB inputs are f
NOM
when the output connected to FB is undivided. The frequency of the REF and FB inputs are f
NOM
/ X when the device is configured for a frequency
multiplication by using external division in the feedback path of value X.
3. For all three state inputs, HIGH indicates a connection to V
CC
, LOW indicates a connection to GND, and MID indicates an open connection. Internal termination
circuitry holds an unconnected input to V
CC
/ 2.
Document Number: 38-07135 Rev. *F
Page 3 of 15
[+] Feedback
CY7B9910
CY7B9920
Maximum Ratings
Exceeding maximum ratings may shorten the useful life of the
device. User guidelines are not tested.
Storage temperature ................................ –65
C to +150
C
Ambient temperature with
power applied ........................................... –55
C to +125
C
Supply voltage to ground potential ...............–0.5 V to +7.0 V
DC input voltage ...........................................–0.5 V to +7.0 V
Output current into outputs (LOW) .............................. 64 mA
Static discharge voltage........................................... > 2001 V
(MIL-STD-883, method 3015)
Latch-up current ..................................................... > 200 mA
Operating Range
Range
Commercial
Industrial
Ambient
Temperature
0
C to +70
C
–40
C to +85
C
V
CC
5 V
10%
5 V
10%
Electrical Characteristics
Over the Operating Range
Parameter
V
OH
V
OL
V
IH
V
IL
V
IHH
V
IMM
V
ILL
I
IH
I
IL
I
IHH
I
IMM
I
ILL
I
OS
Description
Output HIGH voltage
Output LOW voltage
Input HIGH voltage
(REF and FB inputs only)
Input LOW voltage
(REF and FB inputs only)
Three level input HIGH
voltage (Test, FS)
[4]
Three level input MID
voltage (Test, FS)
[4]
Three level input LOW
voltage (Test, FS)
[4]
Min
V
CC
Max
Min
V
CC
Max
Min
V
CC
Max
Test Conditions
V
CC
= Min, I
OH
= –16 mA
V
CC
= Min, I
OH
= –40 mA
V
CC
= Min, I
OL
= 46 mA
V
CC
= Min, I
OL
= 46 mA
CY7B9910
Min
2.4
–
–
–
2.0
–0.5
V
CC
– 1 V
Max
–
–
0.45
–
V
CC
0.8
V
CC
CY7B9920
Min
–
V
CC
– 0.75
–
–
V
CC
– 1.35
–0.5
V
CC
– 1 V
V
CC
/ 2 –
500 mV
0.0
–
–500
–
–50
–
–
Max
–
–
–
0.45
V
CC
1.35
V
CC
V
CC
/ 2 +
500 mV
1.0
10
–
200
50
–200
N/A
V
V
V
V
V
µA
µA
µA
µA
µA
mA
V
Unit
V
V
CC
/ 2 – V
CC
/ 2 +
500 mV 500 mV
0.0
–
–500
–
–50
–
–
1.0
10
–
200
50
–200
–250
Input HIGH leakage current V
CC
= Max, V
IN
= Max
(REF and FB inputs only)
Input LOW leakage current
(REF and FB inputs only)
Input HIGH current
(Test, FS)
Input MID current
(Test, FS)
Input LOW current
(Test, FS)
Output short circuit
current
[5]
V
CC
= Max, V
IN
= 0.4 V
V
IN
= V
CC
V
IN
= V
CC
/ 2
V
IN
= GND
V
CC
= Max, V
OUT
= GND (25
C only)
Notes
4. 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 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
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