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参数资料
| 型号： | MIC3000BMLTR |
| 厂商： | MICREL INC |
| 元件分类： | 数字传输电路 |
| 英文描述： | ATM/SONET/SDH SUPPORT CIRCUIT, QCC24 |
| 封装： | 4 X 4 MM, MLF-24 |
| 文件页数： | 45/68页 |
| 文件大小： | 444K |
| 代理商： | MIC3000BMLTR |
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October 2004
5
M9999-101204
MIC3000
Micrel
Pin Configuration
1
2
3
4
5
6
18
17
16
15
14
13
78
9 10 11 12
24 23 22 21 20 19
FB
VMPD
GNDA
VDDA
VILD–
VILD+
VDDD
NC
GNDD
RSIN
VIN
CLK
SHDN
VRX
XPN
TXF
AUL
T
TXDISABLE
DA
T
A
VMOD+
VMOD–
VBIAS
COMP
RSOUT
RXLOS
24-Pin MLF
Pin Descriptions
Pin Number
Pin Name
Pin Function
1
FB
Analog Input. Feedback voltage for the APC loop op-amp . Polarity and
scale are programmable via the APC configuration bits. Connect to VBIAS if
APC is not used.
2
VMPD
Analog Input. Multiplexed A/D converter input for monitoring transmitted
optical power via a monitor photodiode. In most applications, VMPD will be
connected directly to FB. The input range is 0 - VREF or 0 - VREF/4 depend-
ing on the setting of the APC configuration bits.
3
GNDA
Ground return for analog functions.
4
VDDA
Power supply input for analog functions.
5
VILD–
Analog Input. Reference terminal for the multiplexed pseudo-differential A/D
converter inputs for monitoring laser bias current via a sense resistor (VILD+
is the sensing input). Tie to VDD or GND to reference the voltage sensed on
VILD+ to VDD or GND respectively. Limited common-mode voltage range,
see “Applications Information” section for more details.
6
VILD+
Analog Input. Multiplexed A/D input for monitoring laser bias current via a
sense resistor (signal input); accommodates inputs referenced to VDD or
GND (see pin 5 description). Limited common-mode voltage range, see
“Applications Information” section for more details.
7
SHDN
Digital output; Programmable polarity. Asserted at the detection of a fault
condition that can be used to activate a second series transistor in the laser
current path, enhancing protection against single-point failures.
8
VRX
Analog Input. Multiplexed A/D converter input for monitoring received optical
power. The input range is 0 to VREF.
9
XPN
Analog Input/Output. Optional connection to an external PN junction for
sensing temperature at a remote location. The Zone bit in OEMCFG1
determines whether temperature is measured using the on-chip sensor or
the remote PN junction.
10
TXFAULT
Digital Output; Open-Drain. A high level indicates a hardware fault impeding
transmitter operation. The state of this input is always reflected in the TXFLT
bit.
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