參數(shù)資料
型號(hào)： DS21Q44
元件分類(lèi)： 通信及網(wǎng)絡(luò)
英文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述： Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁(yè)數(shù)： 13/105頁(yè)
文件大?。?/td> 620K
代理商： DS21Q44
DS21Q44
13 of 105
PIN
89
115
125
31
65
91
15
79
111
14
78
110
63
SYMBOL
TSYNC2
TSYNC3
TSYSCLK0
TSYSCLK1
TSYSCLK2
TSYSCLK3
VDD
VDD
VDD
VSS
VSS
VSS
WR*/(R/W*)
TYPE
I/O
I/O
I
I
I
I
-
-
-
-
-
-
I
DESCRIPTION
Transmit Sync for Framer 2
Transmit Sync for Framer 3
Transmit System Clock for Elastic Store in Framer 0
Transmit System Clock for Elastic Store in Framer 1
Transmit System Clock for Elastic Store in Framer 2
Transmit System Clock for Elastic Store in Framer 3
Positive Supply Voltage
Positive Supply Voltage
Positive Supply Voltage
Signal Ground
Signal Ground
Signal Ground
Write Input (Read/Write)
3. DS21Q44 PIN FUNCTION DESCRIPTION
TRANSMIT SIDE PINS
Signal Name:
Signal Description:
Signal Type:
A 2.048 MHz primary clock. Used to clock data through the transmit side formatter.
TCLK
Transmit Clock
Input
Signal Name:
Signal Description:
Signal Type:
Transmit NRZ serial data. Sampled on the falling edge of TCLK when the transmit side elastic store is
disabled. Sampled on the falling edge of TSYSCLK when the transmit side elastic store is enabled.
TSER
Transmit Serial Data
Input
Signal Name:
Signal Description:
Signal Type:
A 256 KHz clock which pulses high during the LSB of each channel. Synchronous with TCLK when the
transmit side elastic store is disabled. Synchronous with TSYSCLK when the transmit side elastic store is
enabled. Useful for parallel to serial conversion of channel data. This function is available when FMS = 1
(DS21Q43 emulation).
TCHCLK
Transmit Channel Clock
Output
Signal Name:
Signal Description:
Signal Type:
A user programmable output that can be forced high or low during any of the 32 E1 channels.
Synchronous with TCLK when the transmit side elastic store is disabled. Synchronous with TSYSCLK
when the transmit side elastic store is enabled. Useful for blocking clocks to a serial UART or LAPD
controller in applications where not all E1 channels are used such as Fractional E1, 384 Kbps (H0), 768
Kbps, 1920 bps (H12) or ISDN–PRI . Also useful for locating individual channels in drop–and–insert
applications, for external per–channel loopback, and for per–channel conditioning. See Section 12 for
details.
TCHBLK
Transmit Channel Block
Output
相關(guān)PDF資料
PDF描述
DS21Q44T Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
DS21Q44TN MICROSWITCH, SPDT, SIM ROLLER LEVER; Current, contact AC:5A; Force, operating:91.75gf; Travel, pre:16.0mm; Centres, fixing LxW:22.2mm; Temp, op. max:120(degree C); Temp, op. min:-40(degree C); Length / Height, external:9.25mm; Width, RoHS Compliant: Yes
DS2251T-128-16 CONNECTOR ACCESSORY
DS2251T-32-16 128k Soft Microcontroller Module
DS2251T-64-16 CONNECTOR ACCESSORY
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS21Q44T 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Enhanced Quad E1 Framer RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21Q44T+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Enhanced Quad E1 Framer RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21Q44TN 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21Q48 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V Quad E1/T1/J1 Line Interface RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21Q48A3N 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 5V Quad E1/T1/J1 Line Interface RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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