STW81102ATR STMicroelectronics, STW81102ATR Datasheet - Page 18

• Manufacturer Part Number: STW81102ATR
• Description: IC SYNTHESIZER MULTI RF 28VFQFPN
• Manufacturer: STMicroelectronics
• Type: Frequency Synthesizerr

Specifications of STW81102ATR

• Pll: Yes
• Input: Clock, Crystal
• Output: Clock, Crystal
• Number Of Circuits: 1
• Ratio - Input:output: 3:2
• Differential - Input:output: No/No
• Frequency - Max: 4.65GHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-VFQFN, 28-VFQFPN
• Frequency-max: 4.65GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

General description
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General description
Figure 1: Block diagram
PLL frequency synthesizer.
The STW81102 consists of two internal low-noise VCOs with buffer blocks, a divider by 2, a
divider by 4, a low-noise PFD (phase frequency detector), a precise charge pump, a 10-bit
programmable reference divider, two programmable counters and a programmable dual-
modulus prescaler. The 5-bit A-counter and 12-bit B-counter, in conjunction with the dual-
modulus prescaler P/P+1 (16/17 or 19/20), implement an N integer divider, where N = B*P
+A. The division ratio of both reference and VCO dividers is controlled through the selected
digital interface (I
The digital interface type is selected by the proper hardware connection of the pin
DBUS_SEL (0 V for I
All devices operate with a power supply of 3.3 V and can be powered down when not in use.
2
C bus or SPI).
2
C bus, 3.3 V for SPI).
shows the separate blocks that, when integrated, form an Integer-N
STW81102