參數(shù)資料
型號: LXT318NE
英文描述: PCM TRANSCEIVER|SINGLE|CEPT PCM-30/E-1|CMOS|DIP|28PIN|PLASTIC
中文描述: 的PCM收發(fā)器|單|優(yōu)稅PCM-30/E-1 |的CMOS |雙酯| 28腳|塑料
文件頁數(shù): 15/26頁
文件大?。?/td> 402K
代理商: LXT318NE
T1 CSU/ISDN PRI Transceiver
LXT310
Datasheet
15
3.0
Application Information
3.1
LATN Decoding Circuits and External Components
To conserve pins, the line attenuation output is encoded as a simple serial bit stream.
Table 4
provides the decoded output for each equalizer setting.
Figure 6
is a typical decoding circuit for the
LATN output. It uses a 2-bit synchronous counter (half of a 4-bit counter) with synchronous reset,
and a pair of flip-flops.
Table 5
lists approved crystals and transformers.
Table 4. LATN Output Coding
L1
L2
Line Attenuation
0
0
1
1
0
1
0
1
0.0 dB
-7.5 dB
-15.0 dB
-22.5 dB
Figure 6. Typical LATN Decoding Circuit
Table 5. Approved Crystals and Transformers
Component
Manufacturer
Part Numbers
Crystal
(6.176 MHz)
M-Tron
MP-1 3808-010 / 4144-002
Monitor Products
MSC1311-01B
CTS Knights
6176-180
Valpey Fisher
1
VF49A16FN1
U.S. Crystal
U18-18-6176SP
1. The customer should always verify the specifications of the quartz crystal against Intel
s recommended specification
point-
by-point
to make certain that the crystal suits the desired application.
Vcc
RCLK
CI
CO
Q
R
Q
D
Q
D
L2
L1
LATN
CI
CO
Q
R
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