STCD2400 Datasheet, PDF (9/39 Pages) STMicroelectronics – Multichannel clock distribution circuit

STCD22x0, STCD23x0, STCD24x0
Device overview
Figure 6. Connections diagram Flip Chip 12-bump (STCD23x0, 3-channel)
3
CLK1
EN1
EN2
CLK2
3
CLK2
EN2
EN1
CLK1
2
BYP
GND
MCREQ
CLK3
2
CLK3
MCREQ
GND
BYP
1
VCC
VTCXO
MCLK
EN3
Top view
1
EN3
MCLK
VTCXO
VCC
Bottom view
A
B
C
D
D
C
B
A
ai14018
Note:
EN1~EN3 can be active high or active low. STMicroelectronics offers several polarity
options, refer to Section 3.2: Enable polarity for detailed information.
Figure 7. Connections diagram Flip Chip 16-bump (STCD24x0, 4-channel)
4
CLK2
EN2
EN3
CLK3
4
CLK3
EN3
EN2
CLK2
3
CLK1
EN1
EN4
CLK4
CLK4
3
EN4
EN1
CLK1
2
BYP
GND
MCREQ
OPT1
2
OPT1
MCREQ
GND
BYP
1
Note:
VCC
VTCXO
MCLK
OPT2
1
OPT2
MCLK
VTCXO
VCC
Top view
Bottom view
A
B
C
D
D
C
B
A
ai14019
OPT1 is used to configure EN1 and EN2 polarity. Connect OPT1 to V_CC to configure EN1
and EN2 active high or connect OPT1 to GND to configure EN1 and EN2 active low. In the
same way OPT2 is used to configure EN3 and EN4. STMicroelectronics offers different
control options, refer to Section 3.2: Enable polarity for detailed information.
Doc ID 15400 Rev 2
9/39