SY88993VKG Microchip

Micrel, Inc. SY88993V 5V/3.3V 3.2Gbps HIGH-SPEED SY88993V LIMITING POST AMPLIFIER DESCRIPTION FEATURES > 3.2Gbps operation The SY88993V limiting post amplifier with its high and wide bandwidth is ideal for use as a post amplifier in fiber- 3.3V or 5V power supply option optic receivers with data rates up to 3.2Gbps. Signals as Low noise CML data outputs small as 4mV can be amplified to drive devices with CML PP Chatter-Free LOS generation inputs. The SY88993V generates a chatter-free Loss of Open Collector TTL LOS output Signal (LOS) open collector TTL output. The SY88993V incorporates a programmble level detect TTL /EN Input function to identify when the input signal has been lost. Differential PECL inputs for data This information can be fed back to the /EN input of the Single power supply device to maintain stability under loss of signal conditions. Available in a tiny 10-pin (3mm) MSOP Using LOS pin the sensitivity of the level detect can be LVL adjusted. The LOS voltage can be set by connecting a LVL resistor divider between V and V , Figure 2. CC REF APPLICATIONS BLOCK DIAGRAM 1.25Gbps Gigabit Ethernet 531Mbps and 1062Mbps Fibre Channel 622Mbps SONET D D OUT IN Gigabit interface converter Limiting CML Amplifer 2.5Gbps SDH/SONET Buffer /D /D IN OUT V REF Enable /EN V CC Level GND Detect LOS LOS LVL Rev.: C Amendment: /0 M9999-082205 11 Issue Date: August 2005 hbwhelp micrel.com or (408) 955-1690Micrel, Inc. SY88993V PACKAGE/ORDERING INFORMATION Ordering Information Package Operating Package Lead /EN 1 10 VCC Part Number Type Range Marking Finish DIN 2 9 DOUT SY88993VKC K10-1 Commercial 993V Sn-Pb MSOP /DIN 3 8 /DOUT K10-1 (1) SY88993VKCTR K10-1 Commercial 993V Sn-Pb VREF 4 7 LOS SY88993VKG K10-1 Commercial 993V with Pb-Free LOSLVL 5 6 GND Pb-Free bar-line indicator NiPdAu (1) SY88993VKGTR K10-1 Commercial 993V with Pb-Free 10-Pin MSOP (K10-1) Pb-Free bar-line indicator NiPdAu Note: 1. Tape and Reel. PIN NAMES GENERAL DESCRIPTION General Pin Type Function The SY88993V is an integrated limiting amplifier intended D Data Input Data Input IN for high-frequency fiber-optic applications. The circuit /D Data Input Inverting Data Input connects to typical transimpedance amplifiers found within IN a fiber-optics link. The linear signal output from a LOS Input Loss of Signal Level Set LVL transimpedance amplifier can contain significant amounts /EN TTL Input Output Enable (Active Low) of noise, and may vary in amplitude over time. The LOS TTL Output Loss of Signal Indicator SY88993V limiting amplifier quantizes the signal and outputs (Open Collector) (Active High) a voltage-limited waveform. GND Ground Ground The /EN pin allows the user to disable the output signal without removing the input signal. D CML Output Data Output OUT /D CML Output Inverting Data Output OUT V Power Supply Positive Power Supply CC V Output Reference Voltage Output REF for LOS Level Set (see Fig. 3) M9999-082205 2 hbwhelp micrel.com or (408) 955-1690