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HYC9088A Half Height
ARCNET Twisted Pair and Coaxial Compatible High Impedance Transceiver HIT
FEATURES
• • • • • ARCNET on Twisted Pair or Coaxial Cable Drives Shielded and Unshielded Twisted Pair Cable or Coaxial Cable Compatible with Existing ARCNET Installations 2.5 Mbps operation Pin Compatible with the ARCNET HYC9068 LAN Driver with the Addition of a Single Terminating Resistor • • • • • Supports Star, Bus, and Daisy Chained Configurations Enhanced Built-in Filters for Reduced EMI Twenty Pin Single In-Line Package Straight or Right Angle Lead Frame New Reduced Size
GENERAL DESCRIPTION
The HYC9088 Twisted Pair and Coaxial on the cable and converts them into TTL signals to Compatible High Impedance Transceiver (HIT) is be supplied to the LAN controller. a hybrid module that interfaces an ARCNET Local DataSheet4U.com Area Network controller to one twisted pair or The HIT supports ARCNET's Dipulse Encoding coaxial cable. The HIT interfaces directly with Scheme and, is 100% compatible with all existing Standard Microsystems Corporation's ARCNET coax-based ARCNET networks. This provides an LAN controllers operating at 2.5 Mbps and ARCNET network designer with flexibility to easily connects to a variety of shielded and unshielded combine coax and twisted pair cabling. twisted pair or coaxial cables via an on-board transformer. The network topologies supported by The HYC9088 is pin compatible with the HYC9058 the HIT are daisy chain, star, and bus High Impedance Transceiver and is pin compatible configurations. with the HYC9068 LAN Driver with the addition of a single terminating resistor. During data transmission, the HIT converts the digital pulse information provided by the LAN controller into analog signals and drives them onto the cable. The transmitted signals are filtered to eliminate undesirable frequencies. The receiver section of the HYC9088 identifies dipulse signals
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TABLE OF CONTENTS
FEATURES...................................................................................................................................................... 1 GENERAL DESCRIPTION.............................................................................................................................. 1 PIN CONFIGURATION.................................................................................................................................... 3 DESCRIPTION OF PIN FUNCTIONS............................................................................................................ 4 FUNCTIONAL DESCRIPTION........................................................................................................................ 5 APPLICATION INFORMATION ..................................................................................................................... 5 OPERATIONAL DESCRIPTION .................................................................................................................. 11 MAXIMUM GUARANTEED RATINGS.......................................................................................... 11 DC ELECTRICAL CHARACTERISTICS...................................................................................... 11
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PIN CONFIGURATION
Pin 1 Designator
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
NC NC VDD GND NC VCC RX TPA NC TPD PH-B/SHIELD PH-A/CENTER GND GND TPC TPB GND
T O P V I E W
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18 nPULSE2 DataSheet4U.com 19 DISABLE 20 nPULSE1
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PACKAGE: 20-Pin SIP Ordering Information: HYC9088AR for right angle lead frame HYC9088AS for straight lead frame
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DESCRIPTION OF PIN FUNCTIONS
PIN NO. 1, 2, 5, 9 3 4, 13, 14, 17 6 7 8, 16, 15, 10 11 12 18 19 20 NAME No Connect Power Supply Ground Power Supply Receive Data Test Points Phase-B/ Shield Phase-A/ Center nPulse 2 Disable TX nPulse 1 SYMBOL NC VDD GND VCC RX TPA, TPB, TPC, TPD PH-B/ SHIELD PH-A/ CENTER nPULSE2 DISABLE TRANSMIT nPULSE1 -5 Volts power supply. Ground. +5 Volts power supply. Output. This signal carries the TTL receive pulse information to the ARCNET LAN Controller Device. Test points. Make no connection to these pins. Output. Connect this signal to Twisted Pair Connector pin 3 or the shield of the coaxial cable. Output. Connect this signal to Twisted Pair Connector pin 2 or the center of the coaxial cable. Input. This signal is supplied by the ARCNET LAN Controller Device. Input. A high level on this signal disables the transmit section of the HYC9088. It is normally connected to ground. Input. This signal is supplied by the ARCNET LAN Controller Device. DESCRIPTION Not used. Make no connection to these pins.
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