SY89837UMI TR Micrel Inc, SY89837UMI TR Datasheet - Page 5

• Manufacturer Part Number: SY89837UMI TR
• Manufacturer: Micrel Inc
• Type: Clock Driverr

Specifications of SY89837UMI TR

• Number Of Clock Inputs: 2
• Mode Of Operation: Differential
• Output Frequency: 2000MHz
• Output Logic Level: LVPECL
• Operating Supply Voltage (min): 2.375V
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.6V
• Package Type: MLF
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Signal Type: CML/LVDS/PECL
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / RoHS Status: Not Compliant

M9999-060410
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Micrel, Inc.
Case #2 Input Clock Failure: Switching from a selected clock
stuck HIGH to a valid clock (RPE enabled).
(using the SEL pin), the switchover will occur in three
stages:
Note:
1. Output shows extended clock cycle during switchover. Pulse width for both high and low of this cycle will always be greater than 50% of the CLK2
Case #3 Input Clock Failure: Switching from a selected clock
stuck LOW to a valid clock (RPE enabled).
(using the SEL pin), the switchover will occur in two stages.
If CLK1 fails HIGH before the RPE MUX selects CLK2
If CLK1 fails LOW before the RPE MUX selects CLK2
period.
Figure 3. Timing Diagram 2
Figure 4. Timing Diagram 3
5
• Stage 1: The output will remain HIGH for a limited
• Stage 2: The output will switch to LOW and then
• Stage 3: The output will follow CLK2.
• Stage 1: The output will remain LOW for a lim-
• Stage 2: The output will follow CLK2.
number of pulses of CLK2.
remain LOW for a limited number of falling edges
of CLK2.
ited number of falling edges of CLK2.
(1)
Precision Edge
SY89837U
®