參數(shù)資料
型號: XRT79L74
廠商: Exar Corporation
英文描述: 4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
中文描述: 4 -通道DS3/E3自動柜員機用戶到網(wǎng)絡(luò)接口/ Combo IC對購買力平價
文件頁數(shù): 52/70頁
文件大?。?/td> 547K
代理商: XRT79L74
XRT79L74
REV. P1.0.0
PRELIMINARY
4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
50
DS3/E3 LIU INTERFACE - LINE SIDE ELECTRICAL CHARACTERISTIC INFORMATION
E3 LINE SIDE PARAMETERS
The XRT79L74 line output at the Transmit Output complies with the pulse template requirements as specified
in ITU-T G.703 for 34.368Mbps operation. The pulse mask as specified in ITU-T G.703 for 34.368Mbps is
shown below in Figure 8.
t11
Clock high to pOE_L low
11
-
-
t12
Clock high to pOE_L high
1.5
-
4.1
F
IGURE
8. P
ULSE
M
ASK
FOR
E3 (34.368M
BPS
) I
NTERFACE
AS
PER
ITU-T G.703
T
ABLE
5: E3 T
RANSMITTER
LINE
SIDE
OUTPUT
AND
RECEIVER
LINE
SIDE
INPUT
SPECIFICATIONS
PARAMETER
MIN
TYP
MAX
UNITS
T
RANSMITTER
LINE
SIDE
OUTPUT
CHARACTERISTICS
Transmit Output Pulse Amplitude
(Measured at secondary of the transformer)
0.9
1.0
1.1
V
pk
Transmit Output Pulse Amplitude Ratio
0.95
1.00
1.05
Transmit Output Pulse Width
12.5
14.55
16.5
ns
Transmit Intrinsic Jitter (without Jitter Attenuator in theTransmit path)
0.01
0.015
UI
PP
T
ABLE
4: T
IMING
I
NFORMATION
FOR
THE
M
ICROPROCESSOR
I
NTERFACE
,
WHEN
CONFIGURED
TO
OPERATE
IN
THE
IBM P
OWER
PC403 M
ODE
Test Conditions: TA = 25°C, VCC = 3.3V±5% and 2.5V±5%, unless otherwise specified.
T
IMING
D
ESCRIPTION
M
IN
.
T
YP
.
M
AX
.
0%
50%
V = 100%
14.55ns
Nominal Pulse
12.1ns
(14.55 - 2.45)
17 ns
(14.55 + 2.45)
8.65 ns
10%
10%
20%
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