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CDB61577 Dataheets PDF



Part Number CDB61577
Manufacturers Cirrus Logic
Logo Cirrus Logic
Description T1/E1 LINE INTERFACE
Datasheet CDB61577 DatasheetCDB61577 Datasheet (PDF)

www.DataSheet4U.com CS61577 T1/E1 Line Interface Features General Description The CS61577 is a drop-in replacement for the CS61574, and combines the complete analog transmit and receive line interface for T1 or E1 applications in a low power, 28-pin device operating from a +5V supply. The CS61577 supports processor-based or standalone operation and interfaces with industry standard T1 and E1 framers. The receiver uses a digital Delay-Locked-Loop which is continuously calibrated from a crystal .

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www.DataSheet4U.com CS61577 T1/E1 Line Interface Features General Description The CS61577 is a drop-in replacement for the CS61574, and combines the complete analog transmit and receive line interface for T1 or E1 applications in a low power, 28-pin device operating from a +5V supply. The CS61577 supports processor-based or standalone operation and interfaces with industry standard T1 and E1 framers. The receiver uses a digital Delay-Locked-Loop which is continuously calibrated from a crystal reference to provide excellent stability and jitter tolerance. The receiver includes a jitter attenuator optimized for minimum delay in switching and transmission applications. The transmitter provides internal pulse shaping to insure compliance with T1 and E1 pulse template specifications. • Provides Analog Transmission Line Interface for T1 and E1 Applications • Drop-in Replacement for CS61574 with the Following Enhancements: - Lower Power Consumption - Transmitter Short-Circuit Current Limiting Greater Transmitter Immunity to Line Reflections Software Selection Between 75Ω and 120Ω E1 Output Options Internally Controlled E1 Pulse Width B8ZS/HDB3/AMI Encoder/Decoder ( ) = Pin Function in Host Mode [ ] = Pin Function in Extended Hardware Mode 2 R E M O T E L O O P B A C K 26 - Applications - • • Interfacing Network Equipment such as DACS and Channel Banks to a DSX-1 Cross Connect Building Channel Service Units - ORDERING INFORMATION CS61577-IP1 28 Pin Plastic DIP CS61577-IL1 28 Pin Plastic PLCC MODE 5 (CLKE) (INT) (SDI) (SDO) TAOS LEN0 LEN1 LEN2 28 23 24 25 TGND TV+ TCLK TPOS [TDATA] TNEG [TCODE] RCLK RPOS [RDATA] RNEG [BPV] 3 4 L O C A L L O O P B A C K 1 15 14 LINE DRIVER 13 16 CONTROL PULSE SHAPER LINE RECEIVER TTIP TRING 8 7 AMI, B8ZS, HDB3, CODER 19 20 17 JITTER ATTENUATOR CLOCK & DATA RECOVERY SIGNAL QUALITY MONITOR RTIP RRING MTIP [RCODE] MRING [PCS] DPM [AIS] 6 DRIVER MONITOR 22 RGND 18 11 9 10 27 LLOOP (SCLK) 12 LOS 21 RV+ RLOOP XTALIN XTALOUT ACLKI (CS) Preliminary Product Information Crystal Semiconductor Corporation P. O. Box 17847, Austin, Texas, 78760 (512) 445-7222 FAX:(512) 445-7581 This document contains information for a new product. Crystal Semiconductor reserves the right to modify this product without notice. Copyright © Crystal Semiconductor Corporation 1996 (All Rights Reserved) MAY ’96 DS155PP2 1 CS61577 ABSOLUTE MAXIMUM RATINGS Symbol Min Max Units DC Supply RV+ 6.0 V TV+ (RV+) + 0.3 V Input Voltage, Any Pin (Note 1) Vin RGND-0.3 (RV+) + 0.3 V Input Current, Any Pin (Note 2) Iin -10 10 mA Ambient Operating Temperature TA -40 85 °C Storage Temperature Tstg -65 150 °C WARNING:Operations at or beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these extremes. Notes: 1. Excluding RTIP, RRING, which must stay within -6V to (RV+) + 0.3V. 2. Transient currents of up to 100 mA will not cause SCR latch-up. Also TTIP, TRING, TV+ and TGND can withstand a continuous current of 100 mA. Parameter (referenced to RGND=TGND=0V) RECOMMENDED OPERATING CONDITIONS Symbol Min Typ Max DC Supply (Note 3) RV+, TV+ 4.75 5.0 5.25 Ambient Operating Temperature TA -40 25 85 400 500 Power Consumption (Notes 4,5) PC Power Consumption (Notes 4,6) PC 230 Notes: 3. TV+ must not exceed RV+ by more than 0.3V. 4. Power consumption while driving line load over operating temperature range. Includes IC and Digital input levels are within 10% of the supply rails and digital outputs are driving a 50 pF capacitive load. 5. Assumes 100% ones density and maximum line length at 5.25V. 6. Assumes 50% ones density and 300ft. line length at 5.0V. Parameter Units V °C mW mW load. DIGITAL CHARACTERISTICS Parameter (TA = -40°C to 85°C; TV+, RV+ = 5.0V ±5%; GND = 0V) Symbol Min Typ Max Units V V V V µA V V V 2.0 High-Level Input Voltage (Notes 7, 8) VIH PINS 1-4, 17, 18, 23-28 Low-Level Input Voltage (Notes 7, 8) VIL 0.8 PINS 1-4, 17, 18, 23-28 High-Level Output Voltage (Notes 7, 8, 9) VOH 4.0 IOUT = -40 µA PINS 6-8, 11, 12, 25 0.4 Low-Level Output Voltage (Notes 7, 8, 9) VOL IOUT = 1.6 mA PINS 6-8, 11, 12, 23, 25 Input Leakage Current (Except Pin 5) ±10 Low-Level Input Voltage, PIN 5 VIL 0.2 High-Level Input Voltage, PIN 5 VIH (RV+) - 0.2 Mid-Level Input Voltage, PIN 5 (Note 10) VIM 2.3 2.7 Notes: 7. In Extended Hardware Mode, pins 17 and 18 are digital inputs. In Host Mode, pin 23 is an open drain output and pin 25 is a tristate output. 8. This specification guarantees TTL compatibility (VOH = 2.4V @ IOUT = -40µA). 9. Output drivers will drive CMOS logic levels into a CMOS load. 10. As an alternative to supplying a 2.3-to-2.7V input, this pin may be left floating. 2 DS155PP2 CS61577 ANALOG SPECIFICATIONS Parameter (TA = -40°C to 85°C; TV+, RV+ = 5.0V ±5%; GND = 0V) Min Typ Max Units Transmitter AMI Output Pulse Amplitudes (Note 11) 2.14 2.37 2.6 V E1, 75 Ω (Note 12) 2.7 3.0 3.3 V E1, 120 Ω (Note 13) 2.7 3.0 3.3 V T1, (FCC Part 68) (Note 14) 2.4 3.


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