XRT6164A ...the analog plus company TM Digital Line Interface Transceiver March 2001 3 APPLICA TIONS FEA TURES D Single 5V Supply D Compatible with CCITT G.703 64Kbps Co-Directional Interface Recommendation When Used With Either XRT6165 or XRT6166 D Low Power D Converts Balanced Bipolar Transmit and Receive Signals Propagated Over Two Twisted Pair Cables to TTL Compatible Dual-Rail Data D Links Remote Equipment Equipped With CCITT G.703 64Kbps Co Directional Interfaces Over DIstances Up to 500 Meters Without Equlaization D Receive Data Comparator Threshold Storage Provides Ping-Pong Operation Capability D Loss of Signal Alarm D Dual Matched Driver Outputs GENERAL D Data Adaption Unit (DAU) D General Purpose TTL Compatible Line Interface DESCRIPTION The XRT6164A is a bipolar analog chip intended for general purpose line interface applications at bit rates up to 1.544Mbps (T1). It contains both receive and transmit circuitry in a 16 pin dual-in-line plastic (PDIP) package. The receiver is designed for short line applications having a cable loss up to 10dB measured at the half bit rate. The ORDERING transmitter has open collector line driver outputs that are capable of handling up to 40mA. When used in conjunction with either XRT6165 or XRT6166, the chip set provides a 64Kbps codirectional interface as specified in CCITT G.703. INFORMA TION Part No. Package Operating Temperature Range XR-T6164AIP 16 Lead 300 Mil PDIP -10°°C to +85°°C XR-T6164AID 16 Lead 300 Mil JEDEC SOIC -10°°C to +85°°C Rev. 1.01 E2001 EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z FAX (510) 668-7017 1 XRT6164A BLOCK DIAGRAM PEAK CAP Positive Data Comparator 14 + RX+I/P - 16 Peak Detector RX-I/P 1 15 S+R 5 S-R 3 RX ALARM 2 I/P BIAS TTL Buffer Threshold Generator + - TCM CON 12 Negative Data Comparator TCM Control TTL Buffer TTL Buffer VCCA 13 GNDA 4 TX+I/P 11 10 TX+O/P TX-I/P 6 8 TX-O/P Bias VCCD 9 GNDD 7 Open Collector Driver Open Collector Driver Figure 1. XRT6164A Rev. 1.01 2 Block Diagram XRT6164A PIN CONFIGURA TION RX-I/P I/P BIAS RX ALARM GNDA S-R TX-I/P GNDD TX-O/P 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 RX-I/P I/P BIAS RX ALARM GNDA S-R TX-I/P GNDD TX-O/P RX+I/P TCM CON PEAK CAP VCCA S+R TX+I/P TX+O/P VCCD 16 Lead PDIP (0.300”) 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 16 Lead SOIC (Jedec, RX+I/P TCM CON PEAK CAP VCCA S+R TX+I/P TX+O/P VCCD 0.300”) PIN DESCRIPTION Pin# Symbol Type Description 1 RX-I/P I Receiver Negative 2 I/P BIAS O Receive Input Bias. 3 RX ALARM O Loss of Signal Alarm. 4 GNDA 5 S-R O Receive 6 TX-I/P I Transmit 7 GNDD 8 TX-O/P 9 VCCD 10 TX+O/P Analog Bipolar Line analog input. Input. Connects to center tap of input transformer secondary winding. Active low. Ground. Negative Negative Output from negative bipolar input pulses (active low). Data Output. Input Data. Input for negative output driver (active low). Digital Ground. O Transmit Negative Output Driver . Open collector, drives output transformer primary. +5V ± 5% Digital Supply . O Transmit 11 TX+I/P I Transmit 12 S+R O Receive 13 VCCA 14 PEAK CAP 15 TCM CON I 16 RX+I/P I Positive Positive Positive +5V ± 5% Analog Peak Detector Output Input Data. Data Output. Positive Input for positive output driver (active low). Output from positive bipolar input pulses (active low). Stores peak detector voltage. Multiplex Control. discharge paths (active low). Receiver Open collector, drives output transformer primary. Supply . Capacitor . T ime Compression Driver . Bipolar Input. Rev.1.01 3 When active, disconnects peak detector charge and Line analog input. XRT6164A ELECTRICAL CHARACTERISTICS Test Conditions: VCC = 5V ± 5%, TA = -10 °C to 85 °C, Unless Otherwise Specified Parameters Min. Typ. Max. Units 4.75 5 5.25 V Analog Supply Current 7 10 mA Digital Supply Current 17 22 mA 1 2.2 Vp Measured from Pins 1 or 16 with Respect to Pin 2 10 dB Maximum Cable Loss Range DC Electrical Conditions Characteristics Supply Voltage Receiver Input Signal Dynamic Range Input Impedance 20 kW Measured Between Pins 1 And 16 Input Slicing Threshold 50 % Percent of Peak Input Signal Amplitude Input Bias Voltage 1.45 V Measured at Pin 2 Loss of Signal Alarm Threshold 150 mVp Loss of Signal Alarm Level Hysteresis ± Peak Detector Leakage 1.5 dB -80 Data Output Low V Measured at Pins 5 or 12, IOUT = +1.6mA V Measured at Pins 5 or 12, IOUT = -40mA V Measured at Pin 3; IOUT = +1.6mA V Measured at Pin 3; IOUT = -40mA 0.8 V Measured at Pin 15; IIN Min = -500mA, IIN Max = +5mA 0.8 V Measured at Pins 6, 11; IIN = -700mA 3.0 Alarm Output Low 0.4 Alarm Output High VCC 0.5 TCM Input Low Voltage Difference Between Alarm-on and Alarm-off Levels mA 0.4 Data Output High Measured from Pins 1 or 16 with Respect to Pin 2 Transmitter Input Low Voltage Input High Voltage V Measured at Pins 6, 11; IIN = +5mA Output Low Voltage 2.2 1.2 V Measured at Pins 8, 10; IOUT = -40mA Output Low Current 40 mA Measured at Pins 8, 10; VOUT = 1.2V mA Measured at Pins 8, 10; VOUT = 10V Outputs in off state 2.2 Vp Pin 1, 16 with Respect to Pin 21 Output Rise Time 80 ns Pins 5, 12; CL = 15pF, 10% to 90% Output Fall Time 80 ns Pins 5, 12; CL =15pF, 90% to 10% Output Leakage Current AC Electrical -100 Characteristics Receiver Input Level Notes 1 Higher input voltages Bold face parameters 1 are possible if a resistive input attenuator is used. are covered by production test and guaranteed over operating Rev. 1.01 4 temperature range. XRT6164A ELECTRICAL CHARACTERISTIC Parameters (CONT’D) Min. Max. Units Output Rise Time 80 ns Pins 8, 10; RL = 130, CL = 15pF, 10% to 90% Output Fall Time 80 ns Pins 8, 10; RL = 130, CL = 15pF, 90% to 10% Rising Edge Delay 100 ns Pins 8, 10; RL = 130, CL = 15pF, 50% to 50% (I/P to O/P) Falling Edge Delay 100 ns Pins 8, 10; RL = 130, CL = 15pF, 50% to 50% (I/P to O/P) AC Electrical Characteristics Typ. Conditions (Cont’d) Transmitter Notes Bold face parameters are covered by production test and guaranteed Specifications ABSOLUTE MAXIMUM are subject to change Supplier without temperature range. notice RA TINGS Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V Magnetic over operating Storage Temperature . . . . . . . . . . . . -65°C to +150°C Information: Pulse Telecom Product Group P.O. Box 12235 San Diego, CA 92112 Tel. (619) 674-8100 Fax. (619) 674-8262 Transpower Technologies, Inc. 24 Highway 28, Suite 202 Crystal Bay, NV 89402 0187 Tel. (702) 831 0140 Fax. (702) 831 3521 Rev.1.01 5 XRT6164A SYSTEM detector output voltage by disconnecting the peak detector storage capacitor charge and discharge paths. Since the receive data comparator bias voltage is stored during transmit mode, it is immediately available when receive mode resumes. DESCRIPTION The XRT6164A is a general purpose line interface chip that contains the receive and transmit circuitry necessary to convert TTL logic levels to a bipolar signal both to and from a twisted pair cable. Transmitter Receiver The XRT6164A transmitter section contains two matched open collector output drivers that are capable of driving the line transformer directly with a current up to 40mA. The transmitter output drivers include diode clamps to ensure non-saturating operation. Transmitter digital inputs, which are active-low, are TTL compatible. External resistors are used between the transmitter outputs and the output transformer primary to set the output pulse amplitude. The XRT6164A receiver section converts a balanced bipolar signal that has been attenuated and distorted by up to 10dB of twisted pair cable to active-low TTL compatible logic levels. The cable is transformer coupled to the receiver differential inputs (RX+IP, RX-IP) which are biased through the input transformer secondary winding by a voltage generated on-chip (I/P BIAS). The bipolar receive signal is applied to a peak detector, and to a pair of data comparators. The peak detector output voltage charges an external capacitor connected to PEAK CAP. This voltage generates a data comparator bias level that is approximately 50% of the peak input pulse amplitude. Thus, data slicing is automatically accomplished at the optimum level over the full cable loss range. TTL compatible output stages buffer the receiver digital outputs (S+R, S-R) and provide active low signals corresponding to received positive and negative input pulses. APPLICA TION INFORMA TION Figure 2 shows a general line driver application circuit using the XRT6164A. This device converts bipolar transmit and receive signals in the 64Kbps to 1.544Mbps range to active-low TTL compatible logic levels. Bipolar signals that have been attenuated and distorted by twisted pair cable are transformer-coupled to the line side of the XRT6164A as shown on the left side of Figure 2 . Suggested transformers for both the input and output applications are the Pulse types PE-65535 or TTI 7147 for 64Kbps use and the PE-65835 for 1.544Mbps applications. Loss of input signal is detected by a comparator that monitors input signal level. An active-low TTL compatible logic level (RX ALARM) indicates signal loss. Comparator hysteresis prevents chatter on this output. The right side of Figure 2 shows the TTL compatible digital inputs and outputs. Please refer to the pin description section of this data sheet for detailed information about each signal. Ping-pong operation is made possible by the time compression multiplex control input (TCM CON). A logic 0 applied to this pin during transmission stores the peak Rev. 1.01 6 XRT6164A +5V 0.1mF Receive Input TIP 1:2 9 13 VCCA VCCD RX+I/P 480 1 RING PE-65535 TTI-7147 Transmit Output 16 0.1mF TIP 2 14 0.1mF I/P BIAS 1:2 +5V 300 300 8 TX+O/P TX-O/P 0.1mF Figure 2. XRT6164A 5 S-R TCM CON 10 12 3 RX ALARM PEAK CAP 0.1mF RING PE-65535 TTI-7147 XRT6164A RX-I/P S+R TX+I/P GNDA GNDD 4 15 11 TX-I/P 7 Line Driver Application Rev.1.01 7 6 RXDATA+ RXDATARX ALARM TCM CON TX DATA+ TX DATA- XRT6164A 16 LEAD PLASTIC DUAL-IN-LINE (300 MIL PDIP) Rev . 1.00 16 9 1 8 E1 E D A2 Seating Plane A L a A1 B INCHES SYMBOL eA eB B1 e MILLIMETERS MIN MAX A 0.145 0.210 3.68 5.33 A1 0.015 0.070 0.38 1.78 A2 0.115 0.195 2.92 4.95 B 0.014 0.024 0.36 0.56 B1 0.030 0.070 0.76 1.78 C 0.008 0.014 0.20 0.38 D 0.745 0.840 18.92 21.34 E 0.300 0.325 7.62 8.26 E1 0.240 0.280 6.10 7.11 e eA MIN 0.100 BSC MAX 2.54 BSC 0.300 BSC 7.62 BSC eB 0.310 0.430 7.87 10.92 L 0.115 0.160 2.92 4.06 a 0°° 15°° 0°° 15°° Note: The control dimension is the inch column Rev. 1.01 8 C XRT6164A 16 LEAD SMALL OUTLINE (300 MIL JEDEC SOIC) Rev . 1.00 D 16 9 E H 1 8 C A Seating Plane e a B A1 L INCHES SYMBOL MILLIMETERS MIN MAX MIN MAX A 0.093 0.104 2.35 2.65 A1 0.004 0.012 0.10 0.30 B 0.013 0.020 0.33 0.51 C 0.009 0.013 0.23 0.32 D 0.398 0.413 10.10 10.50 E 0.291 0.299 7.40 7.60 e 0.050 BSC 1.27 BSC H 0.394 0.419 10.00 10.65 L 0.016 0.050 0.40 1.27 a 0° 8° 0° 8° Note: The control dimension is the millimeter Rev.1.01 9 column XRT6164A Notes Rev. 1.01 10 XRT6164A Notes Rev.1.01 11 XRT6164A NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a user’s specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. Copyright 2001 EXAR Corporation Datasheet March 2001 Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. Rev. 1.01 12