Programmable Fanout Buffer
Description
Programmable Fanout Buffer
5P1105
DATASHEET
Description
The 5P1105 is a programmable fanout buffer intended for high performance consumer, networking, industrial, computing, and data-communications applications.
Configurations may be stored in on-chip One-Time Programmable (OTP) memory or changed using I2C interface.
The outputs are generated from a single reference clock.
The reference clock can come from one of the two redundant clock inputs.
A glitchless manual switchover function allows one of the redundant clocks to be selected during normal operation.
Two select pins allow up to 4 different configurations to be programmed and accessible using processor GPIOs or bootstrapping.
The different selections may be used for different operating modes (full function, partial function, partial power-down), regional standards (US, Japan, Europe) or system production margin testing.
The device may be configured to use one of two I2C addresses to allow multiple devices to be used in a system.
Pin Assignment
OUT0_SEL_I2CB VDDO0 VDDD VDDO1 OUT1 OUT1B
CLKIN CLKINB
XOUT XIN/REF
VDDA
CLKSEL
1 24 23
22
21
20
19 18
2 17
3 16 EPAD
4 15
5 14
6 13 7 8 9 10 11 12
VDDO2 OUT2 OUT2B VDDO3 OUT3 OUT3B
Features
• Up to four high performance universal differential output
pairs – Low RMS additive phase jitter: 0.
2ps
• Four banks of internal non-volatile in-system
programmable or factory programmable OTP memory
• I2C serial programming interface • One additional LVCMOS output clock • Four universal output pairs:
– Each configurable as one differential output pair or two LVCMOS outputs
• I/O Standards:
– Single-ended I/Os: 1.
8V to 3.
3V LVCMOS
– Differential I/Os - LVPECL, LVDS and HCSL
• Input frequency ranges:
– LVCMOS Reference Clock Input (XIN/REF) – 1MHz to 200MHz
– LVDS, LVPECL, HCSL Differential Clock Input (CLKIN, CLKINB) – 1MHz to 350MHz
– Crystal frequency range: 8MHz to 40MHz
• Individually selectable output voltage (1.
8V, 2.
5V, 3.
3V) for
each output pair
• Redundant c...
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