参数资料
| 型号： | SY88216LMG TR |
| 厂商： | Micrel Inc |
| 文件页数： | 3/11页 |
| 文件大小： | 0K |
| 描述： | IC LASER DRVR 2.5GBPS 3.6V 24MLF |
| 标准包装： | 1,000 |
| 类型： | 激光二极管驱动器（光纤） |
| 数据速率： | 2.5Gbps |
| 通道数： | 1 |
| 电源电压： | 3 V ~ 3.6 V |
| 电流 - 电源： | 55mA |
| 电流 - 调制： | 85mA |
| 电流 - 偏置： | 70mA |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 24-VFQFN 裸露焊盘，24-MLF? |
| 供应商设备封装： | 24-MLF?（4x4） |
| 包装： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
Micrel, Inc.
Pin Description
SY88216L
Pin Number
2
3
5
6
7
9
10
12
13
14
16
17
20
22
23
24
8, 11,19
1, 4, 15, 18, 21
Truth Table
Pin Name
DIN+
DIN-
BEN+
BEN-
/EN
OSC
/APCFAULT
PWRMON
BIAS-
BIAS+
MOD+
MOD-
MD
BIASMAX
MODSET
APCSET
GND
VCC
Pin Function
Non-inverting input data. Internally terminated with 50 ? to a reference voltage.
Inverting input data. Internally terminated with 50 ? to a reference voltage.
Non-inverting burst enable. Accepts any input, single-ended or differential: TTL/CMOS,
LVPECL, CML, LVDS, HSTL, and SSTL. BEN requires an external termination. See Figure 2.
Inverting burst enable. Accepts any input, single-ended or differential: TTL/CMOS, LVPECL,
CML, LVDS, HSTL, and SSTL. BEN requires an external termination. See Figure 2.
Active low TTL/CMOS. Internally pulled-up. Pull-down with a 22k ? or lower resistance or
apply a low level signal (<0.8 V) to enable bias and modulation. Keep floating or apply a high
level (>2 V) to disable.
Internal oscillator setting option. Install a 0 ? resistor from this pin to VCC or leave it open to
set the frequency. Refer to the frequency table.
Indicates APC failure when low. Active low TTL/CMOS.
Power Monitor. Provides a current which is proportional to the sum of bias current and half of
modulation current. Install a resistor between this pin and GND to convert that current to a
voltage.
Inverting laser bias current output. Pull-up to VCC with a resistor.
Non-inverting laser bias current output, sources current when BEN is high. Connect to the
cathode of the laser through a resistor.
Non-inverted modulation current output. Provides modulation current when input data is
positive.
Inverted modulation current output. Provides modulation current when input data is negative.
Input from the laser monitoring photodiode. Connect to the anode of the photodiode for APC
operation.
Install a resistor between this pin and GND to set the maximum bias current for the closed
loop operation. The APC loop controls the bias current up to the level of BIASMAX. When the
bias current reaches the maximum value set through this pin, the driver continues to sink a
current equal to this maximum. For open loop operations, this pin sets the bias current.
Modulation current setting and control. The modulation current is set by installing an external
resistor from this pin-to-ground or using a current source.
Bias current setting and control. The bias current is set by installing an external resistor from
this pin to ground or using a current source. Connect a 50K resistor-to-GND for open loop
operation.
Ground. Ground and exposed pad must be connected to the plane of the most negative
potential.
Supply Voltage. Bypass with a 0.1μF//0.01μF low ESR capacitor as close to VCC pin as
possible.
Oscillator Frequency
Output
DIN+
L
DIN-
H
/EN
L
MOD+
H
(1)
MOD-
L
Laser
(2)
L
OSC
Open
VCC
Frequency (MHz)
25
50
H
X
L
X
L
H
L
H
H
L
H
L
Notes:
1.
2.
I MOD = 0 when MOD+ = H.
Assuming that the laser is tied to MOD+.
July 2008
3
M9999-071108-C
hbwhelp@micrel.com or (408) 955-1690
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