STCD2400 Datasheet, PDF (11/39 Pages) STMicroelectronics – Multichannel clock distribution circuit

STCD22x0, STCD23x0, STCD24x0
Device overview
Table 4. Pin functions (STCD24x0, 4-channel)
Pin
Pin
number name
Description
A1
V_CC Supply voltage (decouple with a 1 µF capacitor to GND)
B1 VTCXO LDO output for external clock source (decouple with a 1 µF capacitor to GND)
C1 MCLK Master clock input
Optional pin 2. Connect to V_CC or GND on PC board to field configure EN3 and
D1 OPT2 EN4 active high/low. Refer to Section 3.2: Enable polarity for detailed
information.
A2
BYP
Bypass capacitor input pin (10 nF capacitor should be connected to GND in
order to improve thermal noise performance)
B2
GND Supply ground
C2 MC_REQ Master clock request signal (open drain, active low)
Optional pin 1. Connect to V_CC or GND on PC board to field configure EN1 and
D2 OPT1 EN2 active high/low. Refer to Section 3.2: Enable polarity for detailed
information.
A3
CLK1 Clock output channel - output 1
B3
EN1 Clock output channel enable-1 (active high/low OPT1 field programmable)
C3
EN4 Clock output channel enable-4 (active high/low OPT2 field programmable)
D3
CLK4 Clock output channel - output 4
A4
CLK2 Clock output channel - output 2
B4
EN2 Clock output channel enable-2 (active high/low OPT1 field programmable)
C4
EN3 Clock output channel enable-3 (active high/low OPT2 field programmable)
D4
CLK3 Clock output channel - output 3
Doc ID 15400 Rev 2
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