ZL40255
3-Output Programmable Fanout Buffer with Multi-Format I/O and Dividers
Overview
The ZL40255 SmartBuffer™ is a flexible, programmable fanout buffer IC. The ZL40255 can select from 1 of 4 input clocks and provide as many as 3 differential or 6 CMOS outputs. Each output can provide format conversion, integer frequency division, and skew adjustment. Flexible any-format outputs simplify design. Automatic self-configuration after power-up or reset.
Applications/Uses
- Crystal based frequency synthesis up to 60MHz
- Fanout up to 1035MHz
- Format conversion, frequency division, and skew adjustment in a wide variety of equipment types.
Key Features
- Four Input Clocks
- One crystal/CMOS input
- Two differential/CMOS inputs
- One single-ended/CMOS input
- Any input frequency up to 1035MHz (up to 300MHz for CMOS)
- Clock selection by pin or register control
- Up to Three Differential Outputs (Up to Six CMOS)
- Output frequencies are any integer divisor up to 232 of the input frequency (CMOS 250MHz max)
- Each output has independent dividers
- Low additive jitter <200fs RMS (12kHz-20MHz, for input frequencies ≥100MHz)
- Outputs are CML or 2xCMOS, can interface to LVDS, LVPECL, HSTL, SSTL and HCSL
- In 2xCMOS mode, the P and N pins can be different frequencies (e.g. 125MHz and 25MHz)
- Per-output supply pin with CMOS output voltages from 1.5V to 3.3V
- Precise output alignment circuitry and per-output phase adjustment
- Per-output enable/disable and glitchless start/stop (stop high or low)
General Features
- Automatic self-configuration at power-up from internal EEPROM; up to four configurations, pin-selectable
- Crystal interface for frequency synthesis up to 60MHz
- Four general-purpose I/O pins, each with many status and control options
- SPI or I2C processor Interface
- Tiny 5mm x 5mm QFN package
- ZL40255 can be ordered with up to four user-defined, factory-programmed device configurations
Resources
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Ordering
Clock Fanout Buffer 3-OUT 32-Pin QFN T/R
| Distributor | SKU | Stock | MOQ | Pkg | |
|---|---|---|---|---|---|
| Microchip Technology Inc. | .. | .. | .. | .. | Buy Now |
| DigiKey | ZL40255LDF1-ND | 4000 | Tray | No Stock |
Clock Fanout Buffer 3-OUT 32-Pin QFN Tray
| Distributor | SKU | Stock | MOQ | Pkg | |
|---|---|---|---|---|---|
| Microchip Technology Inc. | .. | .. | .. | .. | Buy Now |
| DigiKey | ZL40255LDG1-ND | 457 | 1 | Tray | Buy Now |
