M02069 Datasheet, PDF (24/44 Pages) M/A-COM Technology Solutions, Inc. – 3.3 or 5 Volt VCSEL/FP Laser Driver IC for Applications to 4.3 Gbps

M02069 Data Sheet
V_CC and V_CC3 status are internally monitored by the M02069 during power-up and normal operation. During
power-up the “slow-start” circuitry requires that V_CC and V_CC3 each reach an acceptable level before enabling bias
or modulation current.
Table 3-1. Pin Connection for 3.3V and 5V V_CC
Pin Connection For:
V_CC3
(pin 21)
C_APC
(pin 20)
PEAK_ADJ
(pin 22)
VCC3_SEL
(pin 4)
V_CC = 3.3V
Connect to V_CC
V_CC = 5V
Reference for C_APC and PEAK_ADJ
Capacitor between C_APC and V_CC3 or V_CC Capacitor between C_APC and V_CC3 (not V_CC)
Connect to V_CC3 or V_CC to disable
Connect to V_CC3 to disable (not V_CC)
Connect to V_CC3 or V_CC
Connect to GND
3.3.3
Common Cathode/Common Anode Configuration Control
When CC_SEL is programmed high, the M02069 is configured for common cathode lasers. When CC_SEL is low, the
M02069 is configured for common anode lasers.
The state of the CC_SEL pin determines:
1. whether bias current is sourced or sunk
2. whether monitor photodiode current is sunk or sourced
3. whether internal termination resistors at OUT+ and OUT- are active
4. whether the redundant safety switch disconnects VCC or GND from the output circuitry.
The affected pins are OUT+, OUT-, SV_CC/IB_OUTCC, and SGND/IB_OUTCA. The Table 3-2 below shows the configu-
ration of each pin for the 2 states of CC_SEL.
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02069-DSH-001-D
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