LTC6409 datasheet(14/34 Pages) LINER

14 / 34 page

LTC2157-14/

LTC2156-14/LTC2155-14

21576514fa

PIN FUNCTIONS

LVDS Outputs

The following pins are differential LVDS outputs. The

output current level is programmable. There is an optional

internal 100Ω termination resistor between the pins of

each LVDS output pair.

OF–/OF+ (Pins 22/23):

Over/Underflow Digital Output.

OF+ is high when an overflow or underflow has occurred.

The overflows for channel A and channel B are multiplexed

together.

DB0_1–/DB0_1+ to DB12_13–/DB12_13+ (Pins 24/25, 26/27,

28/29, 30/31, 34/35, 36/37, 38/39): Channel B Double

Data Rate Digital Outputs. Two data bits are multiplexed

onto each differential output pair. The even data bits (DB0,

DB2, DB4, DB6, DB8, DB10, DB12) appear when CLKOUT+

is low. The odd data bits (DB1, DB3, DB5, DB7, DB9, DB11,

DB13) appear when CLKOUT+ is high.

CLKOUT–/CLKOUT+ (Pins 40/41):

Data Output Clock.

The digital outputs normally transition at the same time

as the falling and rising edges of CLKOUT+. The phase of

CLKOUT+ can also be delayed relative to the digital outputs

by programming the mode control registers.

DA0_1–/DA0_1+ to DA12_13–/DA12_13+ (Pins 42/43, 44/45,

46/47, 50/51, 52/53, 54/55, 56/57): Channel A Double

Data Rate Digital Outputs. Two data bits are multiplexed

onto each differential output pair. The even data bits (DA0,

DA2, DA4, DA6, DA8, DA10, DA12) appear when CLKOUT+

is low. The odd data bits (DA1, DA3, DA5, DA7, DA9, DA11,

DA13) appear when CLKOUT+ is high.

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