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STCD1020, STCD1030, STCD1040
Multi-channel clock distribution circuit
Features
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2, 3 or 4 outputs buffered clock distribution Single-ended sine wave or square wave clock input and output Individual clock enable for each output Lower fan-out on clock source No AC coupling capacitor needed at the input Ultra-low phase noise and standby current 2.5 V to 3.6 V supply voltage(a) 10 pF typical load driving capability Available in TDFN packages – STCD1020 - 8-lead (2 mm x 2 mm) – STCD1030 - 10-lead (2 mm x 2.5 mm) – STCD1040 - 12-lead (2 mm x 3 mm) Operational temperature : –40°C to 85°C
TDFN (8, 10 or 12 lead)
Description
The STCD1020, STCD1030 and STCD1040 are 2, 3 or 4 outputs unity gain clock distribution circuits, which are used to provide a common frequency clock to multi-mode mobile RF applications. It can also be used for those baseband peripheral applications in a mobile phone such as WLAN, Bluetooth, GPS and DVBH as a clock reference. The STCD1020, STCD1030 and STCD1040 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 if the connected device does not need the clock. The STCD1020, STCD1030 and STCD1040 accept commonly used mobile master clock frequencies ranging from 10 MHz to 52 MHz. The STCD1020, STCD1030 and STCD1040 are available in 2 mm x 2 mm 8-lead, 2 mm x 2.5 mm 10-lead and 2 mm x 3 mm 12-lead TDFN packages and can be operated with a single 2.8 V (or 1.8 V) supply. The operational temperature is –40°C to +85°C.
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Applications
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Multi-mode RF clock reference Baseband peripheral devices clock reference
a. For the 1.65 to 2.75 V version, please contact local ST sales office
Table 1.
Device summary
Operating temperature range Channel 2 3 4 Supply 2.8 V 2.8 V 2.8 V Package TDFN8 TDFN10 TDFN12
Order code STCD1020RDG6E STCD1030RDH6E STCD1040RDM6F
–40°C to 85°C –40°C to 85°C –40°C to 85°C
May 2008
Rev 4
1/40
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Contents
STCD1020, STCD1030, STCD1040
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Contents
1 2 3 Device overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Device operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 3.2 Typical applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Connection of the source clock to MCLK . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 5 6 7 8 9
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
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STCD1020, STCD1030, STCD1040
List of tables
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List of tables
Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Table 14. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Pin names and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Truth table for enable signals (EN 1-4) and output clocks (CLK1-4) . . . . . . . . . . . . . . . . . 10 Absolute maximum ratings (1.8 V supply) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Absolute maximum ratings (2.8 V supply) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Operating and AC measurement conditions (1.8 V supply) . . . . . . . . . . . . . . . . . . . . . . . . 15 DC and AC characteristics (1.8 V supply) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Operating and AC measurement conditions (2.8 V supply) . . . . . . . . . . . . . . . . . . . . . . . . 16 DC and AC characteristics (2.8 V supply) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 TDFN - 8-lead (2 x 2 mm) package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 TDFN - 10-lead (2 x 2.5 mm) package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . 35 TDFN - 12-lead (2 x 3 mm) package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Document revision history . . . ..