參數(shù)資料
型號： DS1862AB+
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PBGA25
封裝： 5 X 5 MM, ROHS COMPLIANT, CSBGA-25
文件頁數(shù)： 16/42頁
文件大?。?/td> 586K
代理商： DS1862AB+
DS1862A
XFP Laser Control and Digital Diagnostic IC
______________________________________________________________________________________
23
can only be reset by pulsing the P-DOWN/RST pin high
for the reset time, tRESET, or by toggling the SOFT P-
DOWN/RST bit in Byte 6Eh, bit 3. See the
Power-
Down/Reset Pin section for more details.
Power-Down/Reset Pin
The P-DOWN/RST pin is a multifunction input pin that
resets and/or powers down the DS1862A. Since the pin
is internally pulled up, its normal state is released, which
corresponds to power-down mode. If the P-DOWN/RST
pin is released, or driven high, the DS1862A responds
by shutting down the MODSET and BIASSET currents.
Once the pin is pulled low, operation continues (if not
inhibited by a safety fault). Besides powering down the
DS1862A, a high-going pulse with minimum reset time,
tRESET, can be applied to the P-DOWN/RST pin. This is
necessary to restart the DS1862A, especially if it is in a
safety shutdown condition and needs to be restarted
after the safety condition has been rectified. See the tim-
ing diagrams for proper pin timing.
Power-Down Functionality
During power-down mode IBIASSET and IMODSET drop
below 10μA, effectively shutting down the laser. FETG
is not asserted and safety faults do not occur during
this period. During power-down, I2C communication is
still active, but the signal conditioner pins EN1 and EN2
are noncontrollable and automatically change to the
states: EN1 = 1 and EN2 = 0. Other internal flags/sig-
nals that are based on the signal conditioner inputs still
reflect the status on the signal conditioner pins during
power-down. For example, RX-LOS still reflects the sta-
tus of SC-RX-LOS, and MOD-NR still reflects the logical
states for the signal conditioner pins. Similarly, it is pos-
sible for FETG to be asserted, even though the BIAS-
SET and MODSET currents are shut down. However,
during power-down and a short period, tPDR-OFF, dur-
ing power-up, TX-P Low flag is ignored (internally auto-
matically masked out) and does not contribute to
FETG’s logic.
SHUTDOWN LOGIC
BMD (PIN)
(TX-P CURRENT)
BMD (PIN)
(TX-P CURRENT)
LOW TX-P MASK
HIGH TX-P MASK
QT LOW
TX-P FLAG
QT HIGH
TX-P FLAG
ADC
THRESHOLD
ADC
THRESHOLD
HIGH BIAS MASK
QT HIGH
BIAS FLAG
BIASSET (PIN)
(BIASSET CURRENT)
ADC
THRESHOLD
SOFT TX-D
P-DOWN/RST (PIN)
TX-D (PIN)
SHUTDOWN
FLAG
SAFETY FLAG
SOFT P-DOWN/RST
QT LOW TX-P FLAG
QT HIGH TX-P FLAG
SAFETY FLAG
FETG_POL
DRIVE A P-CHANNEL SWITCH
DRIVE A N-CHANNEL SWITCH
0
1
QT HIGH BIAS FLAG
LA
TCH
LATCHED-TX-FAULT
LA
TCH
FETG (PIN)
FETG_POL
Figure 12. Safety Fault and Shutdown Logic
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相關代理商/技術參數(shù)
參數(shù)描述
DS1862AB+ 功能描述:激光驅(qū)動器 XFP Laser Control & Digital Diagnostic RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube
DS1862AB+T&R 制造商:Maxim Integrated Products 功能描述:XFP LASER CONTROL 25CSBGA - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC LASR CTRLR 7CHAN 5.5V 25CSBGA
DS1862AB+T&R 功能描述:激光驅(qū)動器 XFP Laser Control & Digital Diagnostic RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube
DS1862AB+TR 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:XFP Laser Control and Digital Diagnostic IC
DS1862B 功能描述:激光驅(qū)動器 RoHS:否 制造商:Micrel 數(shù)據(jù)速率:4.25 Gbps 工作電源電壓:3 V to 3.6 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-16 封裝:Tube
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