參數(shù)資料
型號： DS21FT42
元件分類： 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
文件頁數(shù)： 20/145頁
文件大小： 466K
代理商： DS21FT42
DALLAS SEMICONDUCTOR
DS21FF42/DS21FT42
101899
/1230
7. DS21Q42 PIN FUNCTION DESCRIPTION
This section describes the signals on the DS21Q42 die. Signals which are not bonded out
or have limited functionality in the DS21FT42 and DS21FF42 are noted in italics.
TRANSMIT SIDE PINS
Signal Name:
Signal Description:
Signal Type:
A 1.544 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 192 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 (DS21Q41 emulation).
This signal is not
bonded out in the DS21FF42/DS21FT42.
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 24 T1
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 T1
channels are used such as Fractional T1, 384 Kbps service, 768 Kbps 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 16 for details.
This signal
is not bonded out in the DS21FF42/DS21FT42.
TCHBLK
Transmit Channel Block
Output
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS21FT42N 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 4x4 16/4x3 12 Chnl T1/T1 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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21FT44 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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21FT44+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 4X3 E1 Framer E1 Framer 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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21FT44N 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 4x4 16/4x3 12 Chnl E1/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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21FT44N+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 4x4 16/4x3 12 Chnl E1/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 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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