TI380C60 Datasheet, PDF (1/15 Pages) Texas Instruments – CMOS TOKEN-RING INTERFACE DEVICE

D Facilitates Connection of the TI380C25,
TI380C26, or TI380C27 to Token Ring
D Internal Crystal Oscillator for
Reference-Clock Generation
D Loop Back (Wrap Mode) for Self-Test
Diagnostics
D Compatible With Electrical Interface of
ISO/IEC 8802.5: 1995 (ANSI/IEEE Std. 802.5)
Token-Ring Access Method and Physical
Layer Specifications
D Glueless Interface to TI380C2x
COMMprocessor for Token Ring
D 16- and 4-Mbps Token-Ring Data Rates
With no External Switching Circuits
D Repeater Application Requires no
Additional Active Components
D Digital Phase-Locked Loop
− Precise Control of Bandwidths
− Improved Jitter Tolerance
− Minimizes Accumulated Phase Slope
D Phantom Drive for Physical Insertion Onto
Ring
D Differential Line Receiver With
Level-Dependent Frequency Equalization
D Low-Impedance Differential Line Driver to
Ease Transmit-Filter Design
TI380C60
CMOS TOKENĆRING INTERFACE DEVICE
SPWS015B − APRIL 1995 − REVISED OCTOBER 1996
PAH PACKAGE
( TOP VIEW )
PXTAL
VDDD
WRAP
VSSD
DRVR+
DRVR−
WFLT
NSRT
VSSL
FRAQ
VDDL
REDY
NABL
52 51 50 49 48 47 46 45 44 43 42 41 40
1
39
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38
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37
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36
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35
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34
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31
10
30
11
29
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28
13
27
14 15 16 17 18 19 20 21 22 23 24 25 26
VSSA1
RCV+
VDDA1
RCV−
IREF
VSSA2
ATEST
VDDA2
XT1
VSSO
XT2
VDDO
VDDL
D On-Chip Watchdog Timer
D Low-Power Enhanced Performance
Implanted CMOS (EPIC) 0.8-µm Process
D PCMCIA-Compatible 52-Lead 1,0-mm
Plastic Quad Flatpack
description
The TI380C60 token-ring interface device is a full-duplex electrical interface compatible with ISO / IEC
8802.5:1995 (ANSI / IEEE Std. 802.5) token-ring access method and physical layer specifications. The
TI380C60 operates at the IEEE standard 4- and 16-Mbps data rates. The Manchester-encoded data stream
is received and phase-aligned using an on-chip phase-locked loop ( PLL). Both the recovered clock and data
are passed to the protocol-handling circuits of one of the TI380C2x single-chip token-ring COMMprocessors
for serial-to-parallel conversion and data processing. On transmit, the TI380C60 buffers the output of the
TI380C2x and drives the media by way of suitable isolation and waveform-shaping components.
All necessary functions required to interface with an IEEE-802.5 token ring are provided. These include the PLL,
the phantom drive to control the relays within a trunk-coupling unit, and wire-fault detection circuits. An internal
wrap function is provided for self test, and a watchdog timer is included to provide fail-safe deinsertion from the
ring in the event of a station microcode or COMMprocessor failure.
The TI380C60, when coupled with one of the TI380C2x token-ring COMMprocessors, forms a highly integrated
token-ring LAN adapter compatible with the ISO / IEEE Standard 802.5. The TI380C60 synthesizes the
necessary token-ring reference clock for its own use and for the TI380C2x. This removes the need for external
components to provide this function.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EPIC is a trademark of Texas Instruments Incorporated.
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.
Copyright  1996, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
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