參數(shù)資料
型號: DS26303LN-75+A3
廠商: Maxim Integrated Products
文件頁數(shù): 15/101頁
文件大?。?/td> 0K
描述: IC LIU E1/T1/J1 3.3V 144-ELQFP
產品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 1
類型: 線路接口裝置(LIU)
驅動器/接收器數(shù): 8/8
規(guī)程: T1/E1/J1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 144-LQFP 裸露焊盤
供應商設備封裝: 144-LQFP 裸露焊盤
包裝: 托盤
其它名稱: 90-26303+7N3
DS26303: 3.3V, T1/E1/J1, Short-Haul, Octal Line Interface Unit
20 of 101
4.1
Hardware and Host Port Operation
4.1.1
Hardware Mode
The DS26303 supports a hardware configuration mode that allows the user to configure the device through setting
levels on the device’s pins. This mode allows the configuration of the DS26303 without the use of a
microprocessor. Not all of the device features are supported in the hardware mode. To see all available options for
this hardware mode, see the pin descriptions in Table 4-1.
Table 4-2 provides two basic examples of configurations available in hardware mode by setting pins.
Table 4-2. Hardware Mode Configuration Examples
STANDARD MODE CONFIGURATION
PIN NAME,
HARDWARE
MODE
T1
E1
NOTES
TTIP[8:1]
Output
TRING[8:1]
Output
RTIP[8:1]
Input
RRING[8:1]
Input
TPOS[8:1]
Input
TNEG[8:1]
Input
TCLK[8:1]
Input: 1.544MHz
Input: 2.048MHz
RPOS[8:1]
Output
RNEG[8:1]
Output
RCLK[8:1]
Output: 1.544MHz
Output: 2.048MHz
MCLK
Input: 1.544MHz
Input: 2.048MHz
Used as recovery clock.
RLOS[8:1]
Output
Meets T1.231 and ITU-T G.775.
MODESEL
0
Low for hardware mode.
TIMPRM
0
(Part number ends in -75)
100
Ω for T1 mode/75Ω E1 mode.
CODE
1
AMI encoding/decoding.
JAS
N.C.: Pulled to VDDIO/2
Jitter attenuator is not used.
TS[2:0]
111
000
Set template T1 (655ft)-100
Ω/E1-75Ω.
RIMPOFF
0
Receive impedance should default to
on.
INTB
N.C.
Not used in hardware mode.
LP[8:1]
N.C.: Pulled to VDDIO/2
Internally pulled to VDDIO/2.
RIMPMS
0
Internal impedance mode selected.
GMC[3:0]
0000
No monitoring enabled.
OE
1
All TTIPn and TRINGn outputs are
enabled.
CLKE
0
RPOSn/RNEGn are clocked on rising
edge.
JTRSTB
Input, Pulled Up
JTAG.
JTMS
Input
JTCLK
Input
JTDO
Output, High-Z
JTDI
Input, Pulled Up
RSTB
Input, Pullup
Reset.
CLKA
N.C.
Not available in hardware node.
PIN 94
N.C.
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