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STM1E-SFP08

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
STM1E-SFPxx 155Mbps Copper Transceiver
Final Datasheet
STM1E-SFPxx Datasheet - 1 - August 2008 v2-2
Features
• Compatible with the Multi-Source Agreement
(MSA) for SFP transceivers
• 75Ω media interface compliant with
ITU-T G.703 and Telcordia GR-253 for CMI
coded 155Mbps electrical interfaces
• ITU-T G.783 compatible loss of signal detect
• Transmit power down and tri-state control
• Handles over 12.7dB of cable loss
• Extended Temperature operation: -20 C to 85 C
• 75Ω DIN 1.0/2.3 female coaxial media interface
supports Type A and Type D coupling
• Low power dissipation (0.6 W typical)
• Compliant with RoHS 6/6 (lead-free)
Benefits
• Compatible with existing OC3/STM1o line cards
using the pluggable SFP form factor
• Provides end user flexibility on a per port basis
• Reduces cost to system developers for offering
STM-1 electrical interfaces
• Eliminates risk of laser wear out for central office
interconnects
Description
The STM1E-SFPxx is a Small Form-factor Pluggable (SFP) module compatible with the Multi Source Agreement
(MSA) for SFP transceivers. The module utilizes the latest generation of Line Interface Units (LIUs) for 155 Mbit/s
electrical interfaces (STM-1e, ES1) from Teridian Semiconductor Corporation (TSC). It also includes all the
necessary components for interfacing to 75Ω telecommunications coaxial cable.
The Teridian 78P2351R physical layer IC includes Clock & Data Recovery in both directions and a CMI
encoder/decoder for transparent NRZ to CMI line code conversion. It provides Receive Loss of Signal (LOS)
detection for electrical CMI interfaces and the option to disable (and tri-state) the transmit driver. A serial
interface provides access to an on board EEPROM for identification information.
Tx Dis able
Tx Data
Rx Data
Rx LOS
STM1e
(electrical)
input signal
STM1e
(electrical)
output signal
EEPROM
1.0/2.3
Mini-coax
Magnetics
&
Protection
TERIDIAN 78P2351R
STM1e Line Interface Unit
MOD_DEF[2:0] XO
Figure 1: Transceiver Functional Diagram
STM1E-SFPxx 155Mbps Copper Transceiver
Final Datasheet
STM1E-SFPxx Datasheet - 2 - August 2008 v2-2
Data and Control Interface
The STM1E-SFPxx data I/Os accept and provide differential signals at 155.52Mbit/s. AC-coupling for both
transmit and receive traces is handled internally and is thus not required on the host board.
The receive data outputs (RD+/-) provide the recovered STM1/STS3 data to the host in NRZ coding.
During Rx LOS of signal conditions, the receive outputs are squelched. The RD+/- traces on the host
card should be of equal length and differentially terminated with 100Ω at the user SerDes.
The transmit data inputs (TD+/-) accept STM1/STS3 NRZ data at CML or LVPECL levels. The transmit
timing is recovered inside the 78P2351R LIU and used for the CMI line encoding and transmit pulse
driver. The TD+/- traces on the host card should be of equal length.
The physical layer IC used in the STM1E-SFPxx does not require reset or software configuration. Only an
optional Transmit Disable control pin is available for enabling or powering down the transmit driver.
For status monitoring, a Receive Loss of Signal indicator is provided. Loss of Signal detection for STM-1e
(electrical) interfaces is inherently different from optical LOS detection. Reference Receiver Loss of Signal
Condition section for more info on LOS detection criteria for STM-1e (ES1) interfaces.
STM1E-SFPxx
Tx_Disable
TD+
RD+
Rx_LOS
EEPROM
Magnetics
& Coax I/F
78P2351R LIU
MOD_DEF2
0.1uF
0.1uF
75 ohm
coax pair
0.1uF
170
0.1uF
170
20
from circuit
VCC
from circuit
VCC
20
3.3V
130130
82 82
to circuit
to circuit
RD-
TD-
MOD_DEF1
MOD_DEF0
Protocol IC
& SerDes
100
3.3V
PLD / PAL
3.3V
VccT
VccR
4.7K
4.7K4.7K 4.7K 4.7K
Figure 2: Typical Application Configuration
STM1E-SFPxx 155Mbps Copper Transceiver
Final Datasheet
STM1E-SFPxx Datasheet - 3 - August 2008 v2-2
Serial ID Interface
The STM1E-SFPxx supports the 2-wire serial EEPROM protocol for the ATMEL AT24C01 as defined by the MSA.
The serial interface provides access to identification information. The memory is organized as byte wide data
words that can be addresses individually or sequentially at device address 1010000X (A0h).
Special Design Considerations for Using STM1E-SFPxx Transceivers
Host enclosures that use SFP devices should provide appropriate clearances between the SFP transceivers to
allow room for the larger width of the 1.0/2.3 mini-coax front end. For most systems a nominal centerline-to-
centerline spacing of 16.25mm (0.640”) is sufficient, but preferred coax cable types and routing clearances may
require additional spacing.
NOTE: To accommodate the preferred Type D coax coupling and cable types, the width of the nosepiece
or front end was designed to exceed the MSA requirements of 13.7mm (+/- 0.1).
o Reference INF-8074 [Appendix A, Table 1, Designator A] for MSA recommendations
o Reference Mechanical Drawings section for STM1E-SFPxx transceiver dimensions.
The SFP transceiver insertion slot should be clear of nearby moldings and covers that might block convenient
access to the unique latching mechanism used in the STM1E-SFPxx. A bail-style de-latch was not feasible with a
coaxial network interface so a simple push button actuator was employed. Detaching the coax cable from the
STM1E-SFPxx is not required for de-latching the transceiver from the host card.
NOTES:
1. In order to secure the larger push button de-latch mechanism, the length of the bottom of the
transceiver exceeds the maximum MSA requirements of 2.0mm.
o Reference INF-8074 [Appendix A, Table 1, Designator Y] for MSA recommendations
o Reference Mechanical Drawings section for STM1E-SFPxx transceiver dimensions.
2. Note: Double-sided board mounting is generally not recommended due to the limited clearance
for de-latching the STM1E-SFPxx transceiver.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

STM1E-SFP08

Mfr. #:
Buy STM1E-SFP08
Manufacturer:
Maxim Integrated
Description:
Fiber Optic Transmitters, Receivers, Transceivers 155Mbps Copper Transceiver
Lifecycle:
New from this manufacturer.
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