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参数资料
型号： DS26503L
英文描述： T1/E1/J1 BITS Element
中文描述： T1/E1/J1收发BITS的元素
文件页数： 21/123页
文件大小： 995K
代理商： DS26503L
DS26503 T1/E1/J1 BITS Element
21 of 123
4.5 JTAG
NAME
TYPE
FUNCTION
JTCLK
I
JTAG Clock.
This clock input is typically a low frequency (less than 10MHz)
50% duty cycle clock signal.
JTAG Mode Select
(with Pullup).
This input signal is used to control the
JTAG controller state machine and is sampled on the rising edge of JTCLK.
JTAG Data Input
(with Pullup).
This input signal is used to input data into
the register that is enabled by the JTAG controller state machine and is sampled
on the rising edge of JTCLK.
JTAG Data Output.
This output signal is the output of an internal scan shift
register enabled by the JTAG controller state machine and is updated on the
falling edge of JTCLK. The pin is in the high-impedance mode when a register
is not selected or when the
JTRST
signal is high. The pin goes into and exits the
high impedance mode after the falling edge of JTCLK
JTAG Reset (Active Low).
This input forces the JTAG controller logic into
the reset state and forces the JTDO pin into high impedance when low. This pin
should be low while power is applied and set high after the power is stable.
The pin can be driven high or low for normal operation, but must be high for
JTAG operation.
JTMS
I
JTDI
I
JTDO
O
JTRST
I
4.6 Line Interface
NAME
TYPE
FUNCTION
MCLK
I
Master Clock Input.
A (50ppm) clock source. This clock is used internally for
both clock/data recovery and for the jitter attenuator for both T1 and E1 modes.
The clock rate can be 16.384MHz, 8.192MHz, 4.096MHz, or 2.048MHz. When
using the DS26503 in T1-only operation, a 1.544MHz (50ppm) clock source
can be used.
Receive Tip.
Analog input for clock recovery circuitry. This pin connects via a
1:1 transformer to the network. See the
Line Interface Unit
section for details.
Receive Ring.
Analog input for clock recovery circuitry. This pin connects via
a 1:1 transformer to the network. See the
Line Interface Unit
section for details.
Transmit Tip.
Analog line-driver output. This pin connects via a 1:2 step-up
transformer to the network. See the
Line Interface Unit
section for details.
Transmit Ring.
Analog line-driver output. This pin connects via a 1:2 step-up
transformer to the network. See the
Line Interface Unit
section for details.
Transmit High-Impedance Enable.
When high, TTIP and TRING will be
placed into a high-impedance state.
RTIP
I
RRING
I
TTIP
O
TRING
O
THZE
I
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相关代理商/技术参数
参数描述
DS26503L+ 功能描述:计时器和支持产品 E1-T1-J1 Bits Element RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel
DS26503LN 功能描述:计时器和支持产品 E1-T1-J1 Bits Element RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel
DS26503LN+ 功能描述:计时器和支持产品 E1-T1-J1 Bits Element RoHS:否 制造商:Micrel 类型:Standard 封装 / 箱体:SOT-23 内部定时器数量:1 电源电压-最大:18 V 电源电压-最小:2.7 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Reel
DS26504 制造商:Maxim Integrated Products 功能描述:T1/E1/J1 ENH BITS ELEMENT LQFP - Trays
DS26504_06 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:T1/E1/J1/64KCC BITS Element
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