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Part Number: B9946
Description: The B9946 is a low-voltage clock distribution buffer with the capability to select one of two LVCMOS/LVTTL compatible i...
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B9946
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DataSheet
General Description
B9946 General Description
The B9946 is a low-voltage clock distribution buffer with the capability to select one of two LVCMOS/LVTTL compatible in-put clocks. These clock sources can be used to provide for test clocks as well as the primary system clocks. All other control inputs are LVCMOS/LVTTL compatible. The 10 outputs are 3.3V LVCMOS or LVTTL compatible and can drive two series terminated 50Ω transmission lines. With this capability the B9946 has an effective fanout of 1:20.
The B9946 is capable of generating 1X and 1/2X signals from a 1X source. These signals are generated and retimed inter-nally to ensure minimal skew between the 1X and 1/2X sig-nals. SEL(A:C) inputs allow flexibility in selecting the ratio of 1X to1/2X outputs.
The B9946 outputs can also be three-stated via MR/OE# in-put. When MR/OE# is set HIGH, it resets the internal flip-flops and three-states the outputs.
B9946 Maximum Ratings
Maximum Input Voltage Relative to VSS: ........... VSS 0.3V
Maximum Input Voltage Relative to VDD: ............VDD + 0.3V
Storage Temperature: ...............................65to + 150
Operating Temperature: ..............................40 to +85
Maximum ESD Protection.............................................. 2 KV
Maximum Power Supply: ...............................................5.5V
Maximum Input Current:...........................................±20 mA
Maximum Input Voltage Relative to VDD: ............VDD + 0.3V
Storage Temperature: ...............................65to + 150
Operating Temperature: ..............................40 to +85
Maximum ESD Protection.............................................. 2 KV
Maximum Power Supply: ...............................................5.5V
Maximum Input Current:...........................................±20 mA
B9946 Features
• 160-MHz Clock Support
• LVCMOS/LVTTL Compatible Inputs
• 10 Clock Outputs: Drive up to 20 Clock Lines
• 1X or 1/2X Configurable Outputs
• Output Three-state Control
• 250 ps Maximum Output-to-Output Skew
• Pin Compatible with MPC946
• Industrial Temp. Range: 40°C to +85°C
• 32-Pin TQFP Package
• LVCMOS/LVTTL Compatible Inputs
• 10 Clock Outputs: Drive up to 20 Clock Lines
• 1X or 1/2X Configurable Outputs
• Output Three-state Control
• 250 ps Maximum Output-to-Output Skew
• Pin Compatible with MPC946
• Industrial Temp. Range: 40°C to +85°C
• 32-Pin TQFP Package
B9946 Connection Diagram
B9946
PDF/DataSheet Download
- Datasheet: B9946
- File Size: 58837 KB
- Manufacturer: CYPRESS [Cypress Semiconductor]
- Click here to Download
- ·B9946CA
- CYPRESS [Cypress Semiconductor]
- 3.3V, 160-MHz, 1:10 Clock Distribution Buffer
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- ·B9947CA
- CYPRESS [Cypress Semiconductor]
- 3.3V, 160-MHz, 1:9 Clock Distribution Buffer
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- ·B9948
- CYPRESS [Cypress Semiconductor]
- 3.3V, 160-MHz, 1:12 Clock Distribution Buffer
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- ·B9949
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