afbr-820bz Avago Technologies, afbr-820bz Datasheet - Page 15

• Manufacturer Part Number: afbr-820bz
• Description: Twelve-channel Transmitter And Receiver Pluggable, Parallel-fiber-optic Modules
• Manufacturer: Avago Technologies

Transmitter Module Contact Assignment and Signal Description
Figure 9. Host Board Pattern for Transmitter Connector – Top View
15
Signal Name
Adr[2:0]
Din[11:0]p
Din[11:0]n
DNC
GND
IntL
ResetL
SDA
SCL
Vcc25
Vcc33
Case
Common
A
B
C
D
E
G
H
K
F
J
ResetL GND
Vcc25 Vcc33 Vcc33
Adr2
Adr1
Adr0
GND
GND
DNC
DNC
GND
1
Din0p GND
Din0n GND
GND
GND
GND
GND
DNC
GND
2
Signal Description
TWS Module Bus Address bits: Address has the form 0101hjkx where Adr2, Adr1 & Adr0
correspond to h, j & k respectively and x corresponds to the R/W command.
Transmitter Data Non-inverting Input for channels 11 through 0
Transmitter Data Inverting Input for channels 11 through 0
Reserved – Do Not Connect to any electrical potential on Host PCB
Signal Common: All module voltages are referenced to this potential unless otherwise
stated. Connect these pins directly to the host board signal ground plane.
Interrupt signal to Host, Asserted Low: An interrupt is generated in response to any
Tx Fault condition, loss of input signal or assertion of any monitor Flag. It may be
programmed through the TWS interface to generate either a pulse or static level with static
mode as default. This output presents a High-Z condition when IntL is de-asserted and
requires a pull-up on the Host board. Pull-up to the Host 3.3 V supply is recommended.
Reset signal to module, Asserted Low: When asserted the optical outputs are disabled, TWS
interface commands are inhibited, and the module returns to default and non-volatile
settings. An internal pullup biases the input High if the input is open.
TWS interface data signal: Pull-up with a 2.0 kΩ to 8.0 k: resistor to the Host 3.3 V
supply is recommended.
TWS interface clock signal l: Pull-up with a 2.0 k: to 8.0 k: resistor to the Host 3.3 V
supply is recommended.
2.5V Power supply, External common connection of pins required – not common internally
3.3 V Power supply, External common connection of pins required – not common internally
Not accessible in connector. Case common incorporates exposed conductive surfaces
including threaded bosses and is electrically isolated from signal common, i.e. GND. Connect
as appropriate for EMI shield integrity. See EMI clip and bezel cutout recommendation.
Din1p GND
Din1n GND
Din2p GND
Din2n GND
GND
GND
GND
3
Din3p GND
Din3n GND
GND
DNC
DNC
DNC
4
Optical Connector Side
Din4p GND
Din4n GND
Din5n GND
Din5p GND
GND
GND
DNC
DNC
5
Din6n GND Din10n GND
Din6p GND Din10p GND
GND
DNC
DNC
DNC
6
Din8n GND Din11n GND
Din8p GND Din11p GND
Din7n GND
Din7p GND
GND
GND
DNC
DNC
7
Vcc33 Vcc33 Vcc25
GND
DNC
GND
8
Din9p GND
Din9n GND
GND
GND
GND
9
DNC
GND
SDA
SCL
IntL
10
I/O
I
I
I
O
I
I/O
I
Type
3.3V LVTTL
CML
CML
3.3V LVTTL,
high-Z or
driven to 0
level
3.3V LVTTL
3.3V LVTTL/
Open-Drain
3.3V LVTTL