MAX9394 datasheet(5/14 Pages) MAXIM

5 / 14 page

2:1 Multiplexers and 1:2 Demultiplexers with

Loopback

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Pin Description

NAME

FUNCTION

1, 2, 3, 30,

31, 32

N.C.

No Connection. Not internally connected.

4, 9, 20, 25

GND

Ground

ENB

Channel B Output Enable. Drive ENB high to enable the LVDS outputs for channel B. An internal 435k

resistor to GND pulls ENB low when unconnected.

OUTB

Channel B LVDS Noninverting Output. Connect a 100

Ω termination resistor between OUTB and OUTB at

the receiver inputs to ensure proper operation.

OUTB

Channel B LVDS Inverting Output. Connect a 100

Ω termination resistor between OUTB and OUTB at the

receiver inputs to ensure proper operation.

8, 13, 24,

VCC

Power-Supply Input. Bypass each VCC to GND with a 0.1µF and 0.01µF ceramic capacitor. Install both

bypass capacitors as close to the device as possible, with the 0.01µF capacitor closest to the device.

INB0

LVDS/HSTL (MAX9394) or LVPECL/CML (MAX9395) Inverting Input. An internal 128k

Ω pullup resistor to

VCC pulls the input high when unconnected (MAX9394). An internal 68k

Ω resistor to GND pulls the input

low when unconnected (MAX9395).

INB0

LVDS/HSTL (MAX9394) or LVPECL/CML (MAX9395) Noninverting Input. An internal 128k

Ω pullup

resistor to VCC pulls the input high when unconnected (MAX9394). An internal 68k

Ω resistor to GND

pulls the input low when unconnected (MAX9395).

LB_SELB

Loopback Select for Channel B Output. Connect LB_SELB to GND or leave unconnected to reproduce

the INB_ (INB_) differential inputs at OUTB (OUTB). Connect LB_SELB to VCC to loop back the INA (INA)

differential inputs to OUTB (OUTB). An internal 435k

Ω resistor to GND pulls LB_SELB low when

unconnected.

INB1

LVDS/HSTL (MAX9394) or LVPECL/CML (MAX9395) Inverting Input. An internal 128k

Ω pullup resistor to

VCC pulls the input high when unconnected (MAX9394). An internal 68k

Ω resistor to GND pulls the input

low when unconnected (MAX9395).

INB1

LVDS/HSTL (MAX9394) or LVPECL/CML (MAX9395) Noninverting Input. An internal 128k

Ω pullup

resistor to VCC pulls the input high when unconnected (MAX9394). An internal 68k

Ω resistor to GND

pulls the input low when unconnected (MAX9395).

BSEL

Channel B Multiplexer Control Input. Selects the differential input to reproduce at the B channel

differential output. Connect BSEL to GND or leave unconnected to select the INB0 (INB0) set of inputs.

Connect BSEL to VCC to select the INB1 (INB1) set of inputs. An internal 435k

Ω resistor to GND pulls

BSEL low when unconnected.

ENA1

Channel A1 Output Enable. Drive ENA1 high to enable the A1 LVDS outputs. An internal 435k

Ω resistor

to GND pulls the ENA1 low when unconnected.

OUTA1

Channel A1 LVDS Inverting Output. Connect a 100

Ω termination resistor between OUTA1 and OUTA1 at

the receiver inputs to ensure proper operation.

OUTA1

Channel A1 LVDS Noninverting Output. Connect a 100

Ω termination resistor between OUTA1 and

OUTA1 at the receiver inputs to ensure proper operation.

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