DS3181 Maxim Integrated Products, DS3181 Datasheet - Page 110
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DS3181
Manufacturer Part Number
DS3181
Description
Network Controller & Processor ICs DS3-E3 ATM-Packet PH Y with Built-in Line
Manufacturer
Maxim Integrated Products
Datasheet
1.DS3184DK.pdf
(400 pages)
Specifications of DS3181
Product
Framer
Number Of Transceivers
1
Data Rate
44.736 Mbps
Supply Voltage (max)
3.465 V
Supply Voltage (min)
3.135 V
Supply Current (max)
280 mA
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Package / Case
TEBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Manufacturer
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Figure 10-6. CLAD Block
The clock rate adapter can also be disabled and all three clocks supplied externally using the CLKA, CLKB and
CLKC pins as clock inputs. When the CLAD is disabled, the three reference clocks DS3, E3 and STS-1 will need to
be applied to the CLKA, CLKB and CLKC pins, respectively. If any of the three frequencies is not required, it does
not need to be applied to the CLAD CLK pins.
The CLAD MODE inputs to the clock rate adapter are composed of CLAD[3:0] control bits (located in the
Register) which determines which pins are input and output and which clock rate is on which pin. When
CLAD[3:0]=00XX, the PLL circuits are disabled and the signals on the input clock pins are used as the internal LIU
reference clocks. When CLAD[3:0]=(01XX or 10XX or 11XX), none, one or two PLL circuits are enabled to
generate the required clocks as determined by the CLAD[3:0] bits and the framing mode (FM[5:0]) and the line
mode (LM[2:0]) control bits. If a clock rate is not required on the CLAD output clock pins or for a reference clock for
any of the LIU, then the PLL used to generate that clock is disabled and powered down.
For example, in a design that only has the ports running at DS3 rates, then CLAD[3:0] can be set = 0100 and the
DS3 clock signal on the CLKA pin will be used as the DS3 LIU reference clock and no PLL circuit will be disabled.
CLKC
CLKA
CLKB
CLAD MODE
CLAD
110
DS3 clock
E3 clock
CC52 clock
GL.CR2
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