Document
SN75LBC088 AUI CONCENTRATOR
• Meets or Exceeds the Standards Set by ISO
8802.3:1990 and ANSI/IEEE 802.3-1990
• Receiver Squelch Circuit Integrity Improved
With Noise Filter
• Differential (Twisted-Pair) I/O Driver and
Receiver
• 84-Pin, Plastic Leaded Chip Carrier (PLCC)
Package
SLLS150A – DECEMBER 1992 – REVISED MAY 1993
• Control Logic Function for Local and
Global Modes
• Low Port-to-Port Data Propagation Delay • Drives Twisted-Pair Transmission Lines Up
to 50 Meters
• Collision Detection for Multiple-User
Networks
FN PACKAGE (TOP VIEW)
SRX1 – SRX1 + DRVSS1 SCL1 – SCL1 + STX1 – STX1 + DRVDD1 CLK – CLK + GLOBAL VDD(L) VSS(L) DRVSS8 STX8 – STX8 + SCL8 – SCL8 + DRVDD8 SRX8 – SRX8 +
SRX2 + SRX2 – DRVDD2 SCL2 + SCL2 – STX2 + STX2 – DRVSS2 RCVDD1 RCVSS1 SMARTSQE
GTX + GTX – DRVDD3 STX3 + STX3 – SCL3 + SCL3 – DRVSS3 SRX3 + SRX3 –
11 10 9 8 7 6 5 4 3 2 1 84 83 82 81 80 79 78 77 76 75 12 74 13 73 14 72 15 71 16 70 17 69 18 68 19 67 20 66 21 65 22 64 23 63 24 62 25 61 26 60 27 59 28 58 29 57 30 56 31 55 32 54
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
SRX7 – SRX7 + DRVSS7 SCL7 – SCL7 + STX7 – STX7 + DRVDD7 LOCAL RCVSS2 GCL – GCL + RCVDD2 DRVSS6 STX6 – STX6 + SCL6 – SCL6 + DRVDD6 SRX6 – SRX6 +
SRX4 + SRX4 – DRVDD4 SCL4 + SCL4 – STX4 + STX4 – DRVSS4 GRX + GRX – V DD(L)
VSS(L) TEST DRVDD5 STX5 + STX5 – SCL5 + SCL5 – DRVSS5 SRX5 + SRX5 –
description
The SN75LBC088 attachment unit interface (AUI) concentrator chip (ACC) incorporates eight data terminal equipment (DTE) or station ports and one medium attachment unit (MAU) or global port on the same chip for connection to a local area network (LAN). Each station port emulates the driver/receiver functionality, timing, and signal response of a transceiver or MAU designed to meet the IEEE 802.3-1990 standard. The functional components of the ACC are a differential driver, collision detection driver, and a differential line receiver/squelch.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
•POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1993, Texas Instruments Incorporated 2–1
SN75LBC088 AUI CONCENTRATOR
SLLS150A – DECEMBER 1992 – REVISED MAY 1993
description (continued)
This device also has two operational modes, local and global, and a self-exerciser test mode. The SN75LBC088 uses the LinBiCMOS™ process technology to ensure high-speed operation, analog precision, and low power consumption.
Each of the eight station ports includes two differential drivers (STX1 thru STX8 [STXx] and SCL1 thru SCL8 [SCLx]) and one differential receiver [SRX1 thru SRX8 (SRXx)]. The SRXx (station receive) input pair is for receiving data sent from the station to the network. The STXx (station transmit) output pair is for transmitting network data to the station. The SCLx (station collision) output pair transmits the.