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參數資料
| 型號： | AM79C100JC |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | 網絡接口 |
| 英文描述： | Twisted-Pair Ethernet Transceiver Plus (TPEX Plus) |
| 中文描述： | DATACOM, ETHERNET TRANSCEIVER, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁數： | 1/24頁 |
| 文件大小： | 208K |
| 代理商： | AM79C100JC |
FINAL
Publication#
16511
Issue Date:
May 1994
Rev:
B
Amendment/
0
1
Am79C100
Twisted-Pair Ethernet Transceiver Plus (TPEX Plus)
DISTINCTIVE CHARACTERISTICS
CMOS device provides IEEE 802.3-compliant
operation and low operating current from a
single +5 V supply
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Power Down mode for reduced power
consumption in battery-powered applications
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Automatic twisted-pair link integrity
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Pin-selectable twisted-pair receive polarity
detection and automatic inversion of the receive
signal. Polarity indication output pin can
directly drive an LED.
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Pin-selectable twisted-pair link integrity test
capability conforming to the IEEE 802.3
standard. Link status pin can directly drive
an LED.
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Transmit, receive, and collision status
indications available on separate, dedicated
pins
Outputs can directly drive LEDs with pulses
stretched to ensure LED visibility
Internal twisted-pair transmitter digital
predistortion circuit to reduce medium-induced
jitter
Pin-selectable SQE Test (heartbeat) enable
AUI loopback, Jabber Control, and SQE Test
functions comply with the 10BASE-T standard
User-selectable loopback operations
Pin-selectable twisted-pair receive threshold
programming for extended distance line lengths
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GENERAL DESCRIPTION
The Am79C100 Twisted-Pair Ethernet Transceiver Plus
(TPEX Plus) is an integrated circuit that implements the
medium attachment unit (MAU) functions for the
twisted-pair medium, as specified by the supplement to
the IEEE 802.3 standard (Type 10BASE-T). This de-
vice provides the necessary electrical and functional
interface between the IEEE 802.3 standard attachment
unit interface (AUI) and the twisted-pair cable.
A network based on the 10BASE-T standard can use
unshielded twisted-pair cables, providing an economi-
cal solution to networking by allowing the use of existing
telephone wiring. The Am79C100 provides a minimal
component count and a cost-effective solution to the
design and implementation of 10BASE-T standard
networks.
TPEX Plus provides twisted-pair driver and receiver cir-
cuits, including on-board transmit digital predistortion,
receiver squelch, and an AUI port with pin-selectable
SQE Test enable. The device provides a number of ad-
ditional features, including Link Status indication with
automatic twisted-pair receive polarity detection/
correction and indication; pin-selectable receive
threshold programming for extended distance line
lengths; and Receive Carrier Sense, Transmit Active
and Collision Present indications. The device provides
separate twisted-pair Link Status, Polarity Status,
Receive, Transmit, and Collision outputs to drive LEDs
directly.
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