SP3508 Rugged 3.3V, 20Mbps, 8 Channel Multiprotocol Transceiver with Programmable DCE/DTE and Termination Resistors FEATURES Now Available in Lead Free Packaging Fast 20Mbps Differential Transmission Rates Internal Transceiver Termination Resistors Refer to page 9 for pinout for V.11 & V.35 Interface Modes: RS-232 (V.28) EIA-530 (V.10 & V.11) X.21 (V.11) EIA-530A (V.10 & V.11) RS-449/V.36 V.35 (V.35 & V.28) (V.10 & V.11) Protocols are Software Selectable with 3-Bit Word Eight (8) Drivers and Eight (8) Receivers APPLICATIONS Termination Network Disable Option Router Internal Line or Digital Loopback for Diagnostic Testing Frame Relay Certified conformance to NET1/NET2 and TBR-1 TBR-2 by TUV Rheinland (TBR2/30451940.001/04) CSU Easy Flow-Through Pinout DSU +3.3V Only Operation PBX Individual Driver and Receiver Enable/Disable Controls Secure Communi- Operates in either DTE or DCE Mode DESCRIPTION The SP3508 is a monolithic device that supports eight (8) popular serial interface standards for Wide Area Network (WAN) connectivity. The SP3508 is fabricated using a low power BiCMOS process technology, and incorporates a regulated charge pump allowing +3.3V only operation. Exar s patented charge pump provides a regulated output of +5.5V, which will provide enough voltage for compliant operation in all modes. Eight (8) drivers and eight (8) receivers can be configured via software for any of the above interface modes at any time. The SP3508 requires no additional external components for compliant operation for all of the eight (8) modes of operation other than six capacitors used for the internal charge pump. All necessary termination is integrated within the SP3508 and is switchable when V.35 drivers and V.35 receivers, or when V.11 receivers are used. The SP3508 provides the controls and transceiver availability for operating as either a DTE or DCE. Additional features with the SP3508 include internal loopback that can be initiated in any of the operating modes by use of the LOOPBACK pin. While in loopback mode, receiver outputs are internally connected to driver inputs creating an internal signal path bypassing the serial communications controller for diagnostic testing. The SP3508 also includes a latch enable pin with the driver and receiver address decoder. The internal V.11 or V.35 termination can be switched off using a control pin (TERM OFF) for monitoring applications. All eight (8) drivers and receivers in the SP3508 include separate enable pins for added convenience. The SP3508 is ideal for WAN serial ports in networking equipment such as routers, access concentrators, network muxes, DSU/CSU s, networking test equipment, and other access devices. SP3508 101 012920 1ABSOLUTE MAXIMUM RATINGS V .................................................................................................+7V CC Package Derating: Input Voltages: ...................................................................36.9 C/W JA Logic ................................................ -0.3V to (V +0.5V) CC .....................................................................6.5 C/W JC Drivers .............................................. -0.3V to (V +0.5V) CC Receivers .............................................................15.5V Output Voltages: These are stress ratings only and functional operation of the Logic ................................................ -0.3V to (V +0.5V) CC device at these ratings or any other above those indicated in Drivers .....................................................................12V Receivers ......................................... -0.3V to (V +0.5V) CC the operation sections of the specifications below is not implied. Storage Temperature ..................................................-65C to +150C Exposure to absolute maximum rating conditions for extended Power Dissipation ...................................................................1520mW (derate 19.0mW/C above +70C) periods of time may affect reliability. Junction Temperature T ......................................................... +141C J STORAGE CONSIDERATIONS Due to the relatively large package size of the 100-pin quad used within 48 hours or stored in an environment at or below flat-pack, storage in a low humidity environment is preferred. 20%RH. If the above conditions cannot be followed, the parts Large high density plastic packages are moisture sensitive and should be baked for four hours at 125C in order to remove should be stored in Dry Vapor Barrier Bags. Prior to usage, moisture prior to soldering. Exar ships the 100-pin LQFP in Dry the parts should remain bagged and stored below 40C and Vapor Barrier Bags with a humidity indicator card and desiccant 60%RH. If the parts are removed from the bag, they should be pack. The humidity indicator should be below 30%RH. ELECTRICAL SPECIFICATIONS T = 0 to 70C and V = 3.3V 5% unless otherwise noted. The denotes the specifications which apply over the full operating tempera - A CC ture range (-40C to +85C), unless otherwise specified. PARAMETER MIN. TYP. MAX. UNITS CONDITIONS LOGIC INPUTS V 0.8 V IL V 2.0 V IH LOGIC OUTPUTS V 0.4 V I = -3.2mA OL OUT V V V V I = 1.0mA OH CC CC OUT - 0.6 - 0.3 V.28 DRIVER DC Parameters (OUTPUTS) Open Circuit Voltage +/-10 V Per Figure 1 Loaded Voltage +/-5.0 V Per Figure 2 Short-Circuit Current +/-100 mA Per Figure 4 Power-Off Impedance 300 Per Figure 5 V.28 DRIVER AC Parameters (Outputs) V = 3.3V for AC parameters CC Transition Time 1.5 s Per Figure 6, +3V to -3V Instantaneous Slew Rate 30 V/ s Per Figure 3 Propagation Delay: t 0.5 1.0 3.0 s PHL Propagation Delay: t 0.5 1.0 3.0 s PLH Max. Transmission Rate 120 230 kbps SP3508 101 012920 2