stcd2400 STMicroelectronics, stcd2400 Datasheet - Page 5

• Manufacturer Part Number: stcd2400
• Description: Multichannel Clock Distribution Circuit
• Manufacturer: STMicroelectronics

STCD22x0, STCD23x0, STCD24x0
1
Description
The STCD22x0, STCD23x0 and STCD24x0 are 2, 3 or 4 output clock distribution circuits
which accept external square wave or sine wave signals and output rail-to-rail (0 V to
VTCXO) square wave signals. They are used to provide a common frequency clock to
multimode mobile RF applications. They can also be used for those baseband peripheral
applications in mobile phones such as WLAN, Bluetooth, GPS and DVB-H as the clock
reference. The STCD22x0, STCD23x0 and STCD24x0 isolate each device driven by their
clock outputs and minimize interference between the devices. Each of the clock buffers can
be disabled to lower the power consumption whenever the connected device does not need
the clock. The STCD22x0, STCD23x0 and STCD24x0 accept commonly used mobile
master clock frequencies ranging from 10 MHz to 52 MHz.
The STCD22x0, STCD23x0 and STCD24x0 have a common clock request (open drain
output, active low) controlling the external clock source. A 1.8 V, high PSRR LDO is also
integrated in the STCD22x0, STCD23x0 and STCD24x0 to supply power to the external
clock source (for example, TCXO). STMicroelectronics offers different versions for the
enable polarities. The STCD22x0, STCD23x0 and STCD24x0 are available in, respectively,
1.2 mm x 1.6 mm (12-bump), 1.2 mm x 1.6 mm (12-bump) and 1.6 mm x 1.6 mm (16-bump)
chip scale packages and can be operated with a battery supply voltage ranging from 2.5 V
to 5.1 V. The operating temperature is –20 to +85 °C.
Doc ID 15400 Rev 2
Description
5/39