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V23818-C18-L37
Small Form Factor Single Mode 1300 nm Multirate up to 155 Mbit/s Transceiver 2x5 Pinning with LC Connector
Small Form Factor
Single Mode 1300 nm
Multirate up to 155 Mbit/s Transceiver
2x5 Pinning with LC™ Connector
V23818-C18-Lxx/L4xx
Fiber Optics
FeaturesSmall Form Factor transceiverMultisource 2x5 footprint, SFF MSA compliant1)Small footprint for high port densityRJ-45 style LC™ connector systemHalf the size of SC Duplex 1x9 transceiverSingle power supply (3.3 V)Extremely low power consumption, 600 mW typicalLeading performance for receiver sensitivity,
–34 dBm typicalLoss of optical signal indicatorLaser disable, LVTTL inputLVPECL differential inputs and outputsSuitable for multirate applications up to 155 Mbit/sFast Ethernet (FE) compatibleClass 1 FDA and IEC laser safety compliantUL 94 V-0 certifiedCompliant with FCC (Class B) and EN 55022Distance up to 15km/21km on single mode fiber
(SMF)2)Current MSA documentation can be found at www.infineon.com/fiberoptics.IR (Intermediate Reach): up to 15 km (ITU-T G.957), up to 21 km (Telcordia GR-253).
Ordering Information
Stock Products
Products on RequestIR (Intermediate Reach): up to 15 km (ITU-T G.957), up to 21 km (Telcordia GR-253).
Pin Configuration
Figure1
Pin DescriptionLVPECL output active high for V23818-C18-L3x/L436.
LVTTL output active high for V23818-C18-L4x.
EEr / VEEtConnect pins 1 and 7 to signal ground.
CCr / VCCtA 3.3V DC power supply must be applied at pins 2 and 6. A recommended power supply
filter network is given in the termination scheme. Locate power supply filtering directly at
the transceiver power supply pins. Proper power supply filtering is essential for good EMI
performance.
TD+ / TD–Transmitter data LVPECL level inputs. For V23818-C18-L4x terminated and AC coupled
internally. For V23818-C18-L3x/L436 use termination and coupling as shown in the
termination scheme.
RD– / RD+Receiver data LVPECL level outputs. For V23818-C18-L4x biased and AC coupled
internally. For V23818-C18-L3x/L436 use termination and coupling as shown in the
termination scheme.
TDisA logical LVTTL high input will disable the laser. To enable the laser, an LVTTL low input
must be applied. Leave pin unconnected if feature not required.
LVTTL output for V23818-C18-L4x. LVPECL output for V23818-C18-L3x/L436. A logical
high output indicates normal optical input levels to the receiver. Low optical input levels
at the receiver result in a low output. Signal Detect can be used to determine a definite
optical link failure; break in fiber, unplugging of a connector, faulty laser source. However
it is not a detection of a bad link due to data-related errors.
Mounting studs are provided for transceiver mechanical attachment to the circuit board.
They also provide an optional connection of the transceiver to the equipment chassis
ground. The holes in the circuit board must be tied to chassis ground.
Housing leads are provided for additional signal grounding. The holes in the circuit board
must be included and tied to signal ground.
DescriptionThis data sheet describes the Infineon single mode ATM transceiver, which complies
with the ATM Forum’s Network Compatible ATM for Local Network Applications
document and ANSI’s Broadband ISDN - Customer Installation Interfaces, Physical
Media Dependent Specification, T1E1.2, compliant to SONET OC-3, IR-1 (Telcordia
GR-253-CORE) and SDH STM-1/S-1.1 (ITU-T G.957).
This transceiver is also suitable for multirate applications. The performance at lower
datarates may vary from application to application and is link dependent. Refer to
Infineon Application Note 97 for more information.
ATM was developed to facilitate solutions in multimedia applications and real time
transmission. The data rate is scalable, and the ATM protocol is the basis of the
broadband public networks being standardized in the International Telecommunications
Union (ITU), the former International Telegraph and Telephone Consultative Committee
(CCITT). ATM can also be used in local private applications.
The Infineon single mode ATM transceiver is a single unit comprised of a transmitter, a
receiver, and an LC receptacle. This design frees the customer from many alignment
and PC board layout concerns. The module is designed for low cost LAN and WAN
applications. It can be used as the network end device interface in workstations, servers,
and storage devices, and in a broad range of network devices such as bridges, routers,
and intelligent hubs, as well as local and wide area ATM switches.
This transceiver operates at up to 155.520 Mbit/s from a single power supply (+3.3 V).
The full differential data inputs and outputs are LVPECL compatible.
Functional Description of SFF 2x5 Pin Row TransceiverThis transceiver is designed to transmit serial data via single mode fiber.
Figure2Functional DiagramThe receiver component converts the optical serial data into LVPECL compatible
electrical data (RD+ and RD–). The Signal Detect (SD, active high) shows whether an
optical signal is present.
The transmitter converts LVPECL compatible electrical serial data (TD+ and TD–) into
optical serial data.
The transmitter contains a laser driver circuit that drives the modulation and bias current
of the laser diode. The currents are controlled by a power control circuit to guarantee
constant output power of the laser over temperature and aging.
The power control uses the output of the monitor PIN diode (mechanically built into the
laser coupling unit) as a controlling signal, to prevent the laser power from exceeding the
operating limits.
Single fault condition is ensured by means of an integrated automatic shutdown circuit
that disables the laser when it detects laser fault to guarantee the laser eye safety.
The transceiver contains a supervisory circuit to control the power supply. This circuit
makes an internal reset signal whenever the supply voltage (VCCt) drops below the reset
threshold (VTH). It keeps the reset signal active for at least 140 milliseconds after the
voltage has risen above the reset threshold. During this time the laser is inactive.
A high signal on TDis enables the transmitter. If TDis is low or not connected the
Regulatory Compliance
Technical DataExceeding any one of these values may destroy the device immediately.
Absolute Maximum Ratings
The electro-optical characteristics described in the following tables are valid only for use
under the recommended operating conditions.
Recommended Operating Conditions
Transmitter
ReceiverOnly for V23818-C18-Lx5/Lx7.Only for V23818-C18-Lx6/Lx9/L436.Ambient operating temperature requires a 2 ms–1 airflow over the device.For VCC–VEE (min., max.). 50% duty cycle. The supply current does not include the load drive current of the
receiver output. Add max. 45 mA for the three outputs. Load is 50 Ω to VCC–2 V.V23818-C18-L4x are internally AC coupled. External coupling capacitors required for V23818-C18-L3x/L436.
