CY7B9945V-2AXIT Cypress Semiconductor Corp, CY7B9945V-2AXIT Datasheet - Page 6

• Manufacturer Part Number: CY7B9945V-2AXIT
• Description: CY7B9945V-2AXIT
• Manufacturer: Cypress Semiconductor Corp
• Series: RoboClock™r
• Type: Clock Buffer, Fanout Distributionr

Specifications of CY7B9945V-2AXIT

• Pll: Yes
• Input: LVPECL, LVTTL
• Output: LVTTL
• Number Of Circuits: 1
• Ratio - Input:output: 4:10
• Differential - Input:output: Yes/No
• Frequency - Max: 200MHz
• Divider/multiplier: Yes/Yes
• Voltage - Supply: 2.97 V ~ 3.63 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 52-LQFP
• Frequency-max: 200MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Document Number: 38-07336 Rev. *J
Output Disable Description
The output of each output bank can be independently put into a
HOLD OFF or high impedance state. The combination of the
MODE and DIS[1:2] inputs determines the clock outputs’ state
for each bank. When the DIS[1:2] is LOW, the outputs of the
corresponding banks are enabled. When DIS[1:2] is HIGH, the
outputs for that bank are disabled to a high impedance (HI-Z) or
HOLD OFF state.
The HOLD OFF state is a power saving feature. An output bank
is disabled to the HOLD OFF state in a maximum of six output
clock cycles from the time the disable input is HIGH. When
disabled to the HOLD OFF state, outputs are driven to a logic
LOW state on their falling edges. This makes certain that the
Notes
1. FB connected to an output selected for “Zero” skew (i.e., FBF0 = MID or XF[1:0] = MID).
2. The level set on FS is determined by the “nominal” operating frequency (f
3. BK1Q denotes following the skew setting of indicated Bank1 outputs.
4. These inputs are normally wired to V
5. This is for non-three level inputs.
is operating in the undivided mode. The REF and FB are at f
unconnected inputs at V
all data sheet limits are achieved.
Table 5
CC
/2. If these inputs are switched, the function and timing of the outputs may glitch and the PLL may require an additional t
defines the disabled outputs functions.
CC
, GND, or left unconnected (actual threshold voltages vary as a percentage of V
PRELIMINARY
NOM
when the output connected to FB is undivided.
NOM
) of the V
output clocks are stopped without a glitch. When a bank of
outputs is disabled to HI-Z state, the respective bank of outputs
go High-Z immediately.
Table 5. DIS[1:2] Functionality
HIGH/LOW
CO
MODE
and Phase Generator. f
HIGH
LOW
MID
DIS[1:2]
HIGH
HIGH
LOW
NOM
X
always appears on an output when the output
CC
). Internal termination resistors hold the
1Q[0:3], 2Q[0:5]
FACTORY TEST
HOLD-OFF
RoboClock
ENABLED
CY7B9945V
HI-Z
LOCK
Page 6 of 15
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