tza3031ahl NXP Semiconductors, tza3031ahl Datasheet - Page 21

• Manufacturer Part Number: tza3031ahl
• Description: Sdh/sonet Stm1/oc3 Laser Drivers
• Manufacturer: NXP Semiconductors

Philips Semiconductors
APPLICATION INFORMATION
2002 Aug 13
handbook, full pagewidth
SDH/SONET STM1/OC3 laser drivers
(1) Ferrite bead e.g. Murata BLM31A601S.
(2) C5 is required to meet the minimum capacitance value on pin MONIN (optional, see Section “Automatic laser control”).
(3) C6 enhances modulation control loop time constant (optional).
(4) C7 enhances bias control loop time constant (optional).
(5) R1 and R2 are used for setting optical 0 and optical 1 reference currents (see Section “Automatic laser control”).
(6) R3 and R4 are used for setting minimum and maximum bias currents (see Section “Bias alarm for TZA3031AHL”).
(7) Z1 is required for balancing the output stage (see Section “Power supply connections”).
V CC
1 F
C1
Fig.18 Application diagram showing the TZA3031AHL configured for 155 Mbits/s (STM1/OC3).
C5
(2)
22 nF
C6
C7
(1)
(1)
(1)
C8
(3)
(4)
TZERO
MONIN
BGAP
TONE
C2
22 nF
C3
22 nF
C4
22 nF
2
4
5
6
7
V CC(G)
1, 3, 8, 9, 11,
14, 16, 17,
24, 25, 32
11
10
V CC(B)
GND
19, 20,
27, 30
4
TZA3031AHL
MPD
V CC(R)
15
BIAS
L1
R5
18
31
(CML/PECL compatible)
ALS
13
21
LA
normal mode
data inputs
29
DINQ
12
28
LAQ
Z1
DIN
(7)
laser
TZA3031AHL; TZA3031BHL;
23
22
21
18
26
ALARM
ZERO
ONE
ALARMLO
ALARMHI
C9
R1
(5)
R2
(5)
Product specification
R3
TZA3031U
(6)
MBK848
R4
(6)