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VersaClock™ products allow designers to save board space and cost by replacing crystals, oscillators and buffers with a single timing device. Exceptional versatility and configurability allow for maximum freedom in the design process. There are four internal PLLs, each individually programmable, allowing for up to seven unique frequencies. These frequencies are generated from a single reference clock, which can come from one of two redundant clock inputs. A glitchless automatic or manual switchover function allows the redundant clock to be selected during normal operation.
VersaClock III Software optimizes configurations and provides:
- Automatic analysis and adjustment of spread spectrum, loop bandwidths and outputs
- Clock-to-pin locking and multi-register configuration
- Bit-level manipulation
- Direct software interface with VersaClock III evaluation board
- Free software downloads
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| Features |
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Four internal PLLs
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Optional integrated VCXO
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| Internal non-volatile EEPROM |
Each PLL has a 7-bit reference divider and a 12-bit feedback divider
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Fast (400 kHz) mode I2C serial interface for device configuration
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8-bit output divider clocks
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Output frequency range: 4.9 kHz to 500 MHz
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Programmable loop bandwidth settings
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Input clock frequency range: 1 MHz to 200 MHz
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-40 to +85C industrial temperature operation
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Reference crystal input with programmable linear load capacitance
Crystal frequency range: 8 to 50 MHz
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I/O Standards:
Outputs: 1.8/2.5/3.3 V LVTTL / LVCMOS (device dependent)
Outputs: LVPECL, LVDS and HCSL
Inputs: LVTTL / LVCMOS
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Two PLLs support spread spectrum generation
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Redundant clock input with glitch-less auto switchover
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| VersaClock III Product Selection Table |
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XO
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Package
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Output No.
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Output Type
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VDDO *
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| 5V49EE901 |
TSSOP28
QFN32 (5 x 5 mm) |
9
9 |
LVTTL, LVPECL, LVDS, HCSL
LVTTL, LVPECL, LVDS, HCSL |
No
No |
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5V49EE902
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QFN32 (5 x 5 mm)
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9
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LVTTL, LVPECL, LVDS, HCSL
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Yes - 4
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| 5V49EE903 |
TSSOP28
QFN32 (5 x 5 mm) |
9
9 |
LVTTL
LVTTL |
No
No |
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5V49EE904
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QFN32 (5 x 5 mm)
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9
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LVTTL
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Yes - 4
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5V49EE701
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QFN28 (4 x 4 mm)
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7
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LVTTL, LVPECL, LVDS, HCSL
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No
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5V49EE702
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QFN28 (4 x 4 mm)
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7
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LVTTL, LVPECL, LVDS, HCSL
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Yes - 3
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5V49EE703
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QFN28 (4 x 4 mm)
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7
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LVTTL
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No
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5V49EE704
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QFN28 (4 x 4 mm)
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7
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LVTTL
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Yes - 3
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5V49EE501
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QFN24 (4 x 4 mm)
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5
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LVTTL, LVPECL, LVDS, HCSL
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No
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5V49EE502
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QFN24 (4 x 4 mm)
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5
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LVTTL, LVPECL, LVDS, HCSL
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Yes - 2
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5V49EE503
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QFN24 (4 x 4 mm)
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5
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LVTTL
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No
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5V49EE504
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QFN24 (4 x 4 mm)
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5
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LVTTL
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Yes - 2 |
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VCXO
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Package
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Output No.
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Output Type
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VDDO *
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5V19EE901
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TSSOP28
QFN32 (5 x 5 mm) |
9
9
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LVTTL, LVPECL, LVDS, HCSL
LVTTL, LVPECL, LVDS, HCSL |
No
No
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5V19EE902
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QFN28 (4 x 4 mm)
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9
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LVTTL, LVPECL, LVDS, HCSL
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Yes - 4
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5V19EE903
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TSSOP28
QFN32 (5 x 5 mm)
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9
9
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LVTTL
LVTTL
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No
No
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5V19EE904
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QFN28 (4 x 4 mm)
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9
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LVTTL
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Yes - 4
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5V19EE603
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QFN28 (4 x 4 mm)
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6
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LVTTL
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No
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5V19EE604
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QFN28 (4 x 4 mm)
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6
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LVTTL
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Yes - 3
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5V19EE403
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QFN24 (4 x 4 mm)
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4
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LVTTL
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No
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5V19EE404
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QFN24 (4 x 4 mm)
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4
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LVTTL
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Yes - 2 |
| * VDDO capability allows 1.8 - 3.3V output operation |
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| This software calculates solutions for the VersaClock™ III family of programmable clocks. The configuration code generated by this software may be programmed through the I2C device port, enabling users to try out a variety of solutions with minimal turnaround time. |
| The VersaClock III devices do not need or have a programmer like the one used for the earlier parts. The parts may be programmed on the board through the I2C port in production. |
| Supported Platforms: 400 MHz Pentium II or later running Windows Vista, XP, 2000 and NT 4.0 |
| Installation requires Microsoft Installer (MSI) Version 2.0. This is included with Windows Vista, XP and Windows 2000 SP3. |
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Current Software Version: 4.00 (Aug. 23, 2010)
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| Additional VersaClock Product Information and Links |
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