Rainbow-electronics DS2152 Manual do Utilizador descarregar pdf (Página 58)

DS2152

031897 58/79

DS2152 EXTERNAL ANALOG CONNECTIONS Figure 14–1

1:1

1.15:1 (Rt = 0 Ohms) or

1.36:1 (Rt = 4.7 Ohms)

(larger winding toward

0.47 uF

(non–

polarized)

0. 1uF

+5V

50 50

0.1 uF

0. 01uF

1.544 MHz

–or–

C1/C2

DS2152

T1 TRANSMIT

LINE

T1 RECEIVE

LINE

TTIP

TRING

RTIP

RRING

DVDD

DVSS

RVDD

RVSS

TVDD

TVSS

XTALD

MCLK

XTALD

the network)

1.544 MHz

NOTES:

1. Resistor values are ± 1%.

2. The Rt resistors are used to protect the device from over–voltage.

3. See the Separate Application Note for details on how to construct a protected interface.

4. Either a crystal can be applied across the MCLK and XTALD pins or a TTL level clock can be applied to just

MCLK.

5. C1 and C2 should be 5 pF lower than two times the nominal loading capacitance of the crystal to adjust for

the input capacitance of the DS2152.

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 78 79

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