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TI380C60A Datasheet

  • TI380C60A

  • CMOS TOKEN-RING INTERFACE DEVICE

  • 16頁

  • TI

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TI380C60A
CMOS TOKEN-RING INTERFACE DEVICE
SPWS033 鈥?DECEMBER 1996
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Facilitates Connection of the TI380C25,
TMS380C26, or TI380C27 to Token Ring
Internal Crystal Oscillator for
Reference-Clock Generation
Loop Back (Wrap Mode) for Self-Test
Diagnostics
Compatible With Electrical Interface of
ISO/IEC 8802.5: 1995 (ANSI/IEEE Std. 802.5)
Token-Ring Access Method and Physical
Layer Specifications
Glueless Interface to TI380C2x
Commprocessor for Token Ring
16- and 4-Mbps Token-Ring Data Rates
With no External Switching Circuits
Repeater Application Requires no
Additional Active Components
Digital Phase-Locked Loop
鈥?Provides Precise Control of Bandwidths
鈥?Provides Improved Jitter Tolerance
鈥?Minimizes Accumulated Phase Slope
Phantom Drive for Physical Insertion Onto
Ring
Differential Line Receiver With
Level-Dependent Frequency Equalization
Low-Impedance Differential Line Driver to
Ease Transmit-Filter Design
PAH PACKAGE
( TOP VIEW )
RATER
VDDD
OSC32
RCVR
VSSD
RCLK
TRST
TCLK
TMS
EQ +
TDO
TDI
EQ 鈥?/div>
52 51 50 49 48 47 46 45 44 43 42 41 40
PXTAL
VDDD
WRAP
VSSD
DRVR+
DRVR鈥?/div>
WFLT
NSRT
VSSL
FRAQ
VDDL
REDY
NABL
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14 15 16 17 18 19 20 21 22 23 24 25 26
39
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VSSA1
RCV+
VDDA1
RCV鈥?/div>
IREF
VSSA2
ATEST
VDDA2
XT1
VSSO
XT2
VDDO
VDDL
XMT+
XMT鈥?/div>
VDDX
PHOUTB
PWRDN
VSSX
S4 / 16
REPT
VSSP
PHOUTA
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On-Chip Watchdog Timer
Low-Power 0.8-碌m Enhanced Performance
Implanted CMOS (EPIC鈩? Technology by
Texas Instruments (TI鈩?
PCMCIA-Compatible 52-Lead 1,0-mm
Plastic Quad Flatpack
description
The TI380C60A 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
TI380C60A 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 TI380C60A 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 TI380C60A, 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 TI380C60A 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 and TI are trademarks 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
漏
1996, Texas Instruments Incorporated
POST OFFICE BOX 1443
鈥?/div>
HOUSTON, TEXAS 77251鈥?443
VDDP
RES
VSSL
1

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