参数资料
| 型号： | MAX3766EEP+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 10/20页 |
| 文件大小： | 0K |
| 描述： | IC LASR DRVR 622MBPS 5.5V 20QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 激光二极管驱动器（光纤） |
| 数据速率： | 622Mbps |
| 通道数： | 1 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 电流 - 电源： | 25mA |
| 电流 - 调制： | 60mA |
| 电流 - 偏置： | 80mA |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 20-QSOP |
| 包装： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
622Mbps LAN/WAN Laser Driver with
Automatic Power Control and Safety Shutdown
OPEN
COLLECTOR
FAIL
SIMPLIFIED
FAILURE
(INTERNAL)
V CC
S
RESET DOMINATE
RS FLIP-FLOP
OPEN-COLLECTOR
OUTPUT CIRCUIT
OUT
SAFETY
200k
R
Q
C SAFETY
OPEN
COLLECTOR
SHDN
(INTERNAL)
IN
ENABLE
100k
Figure 4. Simplified Safety Circuit Schematic
Latched Shutdown Configuration
This configuration is shown in the Typical Application
Circuits (configured for best performance), and can
be selected by connecting a capacitor (C SAFETY ) to
V CC
V CC ON (OR ENABLE SWITCHED TO ON STATE)
ground at SAFETY. In this configuration, the transmitter
is shut down when a failure is detected. It can be
LASER BIAS AND
t ON
OUTPUT CURRENTS ENABLED AFTER A FIXED DELAY
restarted only by a power-on cycle or a toggle of the
ENABLE input.
MODULATION CURRENT
During start-up, FAIL is asserted until laser power reach-
es the programmed level. The safety circuit must be dis-
abled at power-on or at transmitter enable, providing
FAIL
OUTPUT
t APC
FAIL DEASSERTS WHEN THE APC LOOP SETTLES
enough time for the APC circuit to reach the programmed
laser power level.
In space-constrained designs, C SAFETY can be select-
ed to provide a shutdown delay. When power is initially
SAFETY
t SAFETY
SAFETY FEATURES START CHECKING
THE FAILURE SIGNAL AFTER A TIME SET
applied, or when the ENABLE signal is toggled from a
logic 0 to a logic 1, the voltage at SAFETY is low, and
rises with a time constant set by C SAFETY and an inter-
nal 200k ? pull-up resistor. The SAFETY signal is invert-
ed and resets the input of a reset-dominant RS flip-flop.
The internal signal FAILURE from the failure-detection
circuit is connected to the set input of the flip-flop. After
SAFETY has gone high (allowing time for the APC feed-
back loop to settle) and if internal signal FAILURE is low,
the flip-flop output is low, and the bias and modulation
outputs are allowed to remain on. Refer to Figure 5 for
a timing diagram of start-up in the latched shutdown
configuration.
BY A CAPACITOR ON THE SAFETY INPUT.
AFTER THIS TIME, THE LASER DRIVER IS
DISABLED IF A FAILURE OCCURS.
Figure 5. Start-Up Sequence Timing
The duration of t SAFETY must be about 10 times t APC for
a successful start-up. After start-up, the transmitter
operates normally until a failure is detected, causing
the output currents to be shut down. The laser-current
outputs remain off until the failure condition is eliminat-
ed and the ENABLE input is toggled, or until the power
is cycled. A potential problem with this transmitter-
enable method is that a slow-rising power supply may
not enable the transmitter.
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3766EVKIT | 功能描述:激光驱动器 Evaluation Kit for the MAX3766 RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
| MAX3768C/D | 功能描述:限幅放大器 RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
| MAX3768CUB | 功能描述:限幅放大器 3-5.5V 1.25/2.5Gbps RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
| MAX3768CUB+ | 功能描述:限幅放大器 3-5.5V 1.25/2.5Gbps RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
| MAX3768CUB+T | 功能描述:限幅放大器 3-5.5V 1.25/2.5Gbps RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
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