DS3104 datasheet(13/136 Pages) MAXIM

13 / 136 page

________________________________________________________________________________________ DS3104-SE

19-4627; Rev 6; 5/09

13 of 136

Pin Descriptions

Table 6-1. Input Clock Pin Descriptions

PIN NAME

(1)

TYPE

(2)

PIN DESCRIPTION

REFCLK

Reference Clock. Connect to a 12.800MHz, high-accuracy, high-stability, low-noise local

oscillator (XO or TCXO). See Section 7.3.

IC1POS,

IC1NEG

IDIFF

Input Clock 1. LVDS/LVPECL or CMOS/TTL. Programmable frequency (default 8kHz).

LVDS/LVPECL:

See Table 10-4, Figure 10-1, and Figure 10-2.

CMOS/TTL:

Bias IC1NEG to 1.4V and connect the single-ended signal to IC1POS.

IC2POS,

IC2NEG

IDIFF

Input Clock 2. LVDS/LVPECL or CMOS/TTL. Programmable frequency (default 8kHz).

LVDS/LVPECL:

See Table 10-4, Figure 10-1, and Figure 10-2.

CMOS/TTL:

Bias IC2NEG to 1.4V and connect the single-ended signal to IC2POS.

This input can be associated with the SYNC3 pin.

IC3

IPD

Input Clock 3. CMOS/TTL. Programmable frequency (default 8kHz). This input can be

associated with the SYNC1 pin.

IC4

IPD

Input Clock 4. CMOS/TTL. Programmable frequency (default 8kHz). This input can be

associated with the SYNC2 pin.

IC5POS,

IC5NEG

IDIFF

Input Clock 5. LVDS/LVPECL or CMOS/TTL. Programmable frequency (default 19.44MHz).

LVDS/LVPECL:

See Table 10-4, Figure 10-1, and Figure 10-2.

CMOS/TTL:

Bias IC5NEG to 1.4V and connect the single-ended signal to IC5POS.

This input can be associated with the SYNC1 pin.

IC6POS,

IC6NEG

IDIFF

Input Clock 6. LVDS/LVPECL or CMOS/TTL. Programmable frequency (default 19.44MHz).

LVDS/LVPECL:

See Table 10-4, Figure 10-1, and Figure 10-2.

CMOS/TTL:

Bias IC6NEG to 1.4V and connect the single-ended signal to IC6POS.

This input can be associated with the SYNC2 pin.

IC8

IPD

Input Clock 8. CMOS/TTL. Programmable input reference (default 19.44MHz).

IC9

IPD

Input Clock 9. CMOS/TTL. Programmable frequency (default 19.44MHz). This input can be

associated with the SYNC3 pin.

SYNC1

IPD

Frame-Sync 1 Input. 2kHz, 4kHz, or 8kHz.

FSCR3:SOURCE ! = 11XX. This pin is the external frame-sync input associated with any input

pin using the FSCR3:SOURCE field.

FSCR3:SOURCE = 11XX. This pin is the external frame-sync signal associated with IC3 or

IC5, depending on which one is currently selected and the setting of FSCR1.SYNCSRC[1:0].

SYNC2

IPD

Frame-Sync 2 Input. 2kHz, 4kHz, or 8kHz.

FSCR3:SOURCE ! = 11XX. This pin is not used for the external frame-sync signal.

FSCR3:SOURCE = 11XX. This pin is the external frame-sync signal associated with IC4 or

IC6, depending on which one is currently selected and the setting of FSCR1.SYNCSRC[1:0].

SYNC3

IPU

Frame-Sync 3 Input. 2kHz, 4kHz, or 8kHz.

FSCR3:SOURCE ! = 11XX. This pin is not used for the external frame-sync signal.

FSCR3:SOURCE = 11XX. This pin is the external frame-sync signal associated with IC9 or

IC2, depending on which one is currently selected and the setting of FSCR1.SYNCSRC[1:0].

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