參數資料
型號： DS21Q50LN
廠商： Maxim Integrated Products
文件頁數： 28/87頁
文件大?。?/td> 0K
描述： IC TRANSCEIVER E1 QD IND 100LQFP
產品培訓模塊： Lead (SnPb) Finish for COTS
產品變化通告： Product Discontinuation 20/Feb/2012
標準包裝： 90
功能： 收發(fā)器
接口： E1
電路數： 4
電源電壓： 3.14 V ~ 3.47 V
電流 - 電源： 230mA
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 100-LQFP
供應商設備封裝： 100-LQFP（14x14）
包裝： 托盤
包括： AIS 警報檢測器和發(fā)生器，回送功能，PRBS 發(fā)生器 / 檢測器，遠程檢測器和發(fā)生器
DS21Q50
34 of 87
Register Name:
SSR
Register Description:
Synchronizer Status Register
Register Address:
09 Hex
Bit
7
6
5
4
3
2
1
0
Name
CSC5
CSC4
CSC3
CSC2
CSC0
FASSA
CASSA
CRC4SA
NAME
BIT
FUNCTION
CSC5
7
CRC4 Sync Counter Bit 5. MSB of the 6-bit counter.
CSC4
6
CRC4 Sync Counter Bit 4
CSC3
5
CRC4 Sync Counter Bit 3
CSC2
4
CRC4 Sync Counter Bit 2
CSC0
3
CRC4 Sync Counter Bit 0. LSB of the 6-bit counter. Counter Bit 1 is not accessible.
FASSA
2
FAS Sync Active. Set while the synchronizer is searching for alignment at the FAS level.
CASSA
1
CAS MF Sync Active. Set while the synchronizer is searching for the CAS MF alignment
word.
CRC4SA
0
CRC4 MF Sync Active. Set while the synchronizer is searching for the CRC4 MF
alignment word.
5.1 CRC4 Sync Counter
The CRC4 sync counter increments each time the 8ms CRC4 multiframe search times out. The counter is
cleared when the framer has successfully obtained synchronization at the CRC4 level. Disabling the
CRC4 mode (CCR1.0 = 0) can also clear the counter. This counter determines the time the framer has
been searching for synchronization at the CRC4 level. ITU G.706 suggests that if synchronization at the
CRC4 level cannot be obtained within 400ms, the search should be abandoned and proper action taken.
The CRC4 sync counter rolls over.
Table 5-1. Alarm Criteria
ALARM
SET CRITERIA
CLEAR CRITERIA
ITU SPEC
RSA1
(receive signaling
all ones)
Over 16 consecutive frames (one
full MF) time slot 16 contains
fewer than three 0s
Over 16 consecutive frames (one full
MF) time slot 16 contains three or
more 0s
G.732
4.2
RSA0
(receive signaling
all zeros)
Over 16 consecutive frames (one
full MF) time slot 16 contains all
0s
Over 16 consecutive frames (one full
MF) time slot 16 contains at least a
single 1
G.732
5.2
RDMA
(receive distant
multiframe alarm)
Bit 6 in time slot 16 of frame 0 set
to one for two consecutive MF
Bit 6 in time slot 16 of frame 0 set to 0
for two consecutive MF
O.162
2.1.5
RUA1
(receive unframed
all ones)
Fewer than three 0s in two frames
(512 bits)
More than two 0s in two frames (512
bits)
O.162
1.6.1.2
RRA
(receive remote
alarm)
Bit 3 of nonalign frame set to 1 for
three consecutive occasions
Bit 3 of nonalign frame set to 0 for
three consecutive occasions
O.162
2.1.4
RCL
(receive carrier loss)
255 (or 2048) consecutive 0s
received
In 255-bit times, at least 32 1s are
received
G.775/
G.962
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參數描述
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DS21Q50L-W+ 功能描述:網絡控制器與處理器 IC Quad E1 Transceiver RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21Q50N 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC
DS21Q55 功能描述:IC TXRX QUAD T1/E1/J1 SCT 256BGA RoHS:否 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS 產品變化通告:Product Discontinuation 06/Feb/2012 標準包裝:750 系列:*
DS21Q552 功能描述:網絡控制器與處理器 IC 5V Quad T1 Transceiver RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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