DM9081 Ver la hoja de datos (PDF) - Davicom Semiconductor, Inc.
Número de pieza
componentes Descripción
Fabricante
DM9081 Datasheet PDF : 22 Pages
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Features
Repeater functions comply with IEEE 802.3
Repeater Unit specification
Eight Integral 10BASE-T transceivers utilize the
required pre-distortion transmission technique
Two Attachment Unit Interface (AUI) ports allow
connection with 10BASE5 (Ethernet) and
10BASE2
(Cheapernet) networks
Design a Dumb Hub in minimum mode by using
minimum external logic that can respond to Link,
Carrier Sense and Collision Status from LED
Supports one LED output per port for additional
status indicators such as Link, Partition, Carrier
Sense, etc.
Built-in Jabber LED reports global Jabber
information of the DM9081 Hub
Pin Configuration
DM9081
10BASE-T Hub Controller
Built-in Traffic LED indicates Hub global 10MHz
bandwidth utilization status
Expandable to accommodate two DM9081
connections, with no external logic required
On board PLL, Manchester encoder/decoder and
FIFO
Expandable to accommodate increased number of
repeater ports. Recommended IC cascade number:
under 3 and inclusive
Preamble loss effects eliminated by deep FIFO
Each port can be isolated (partitioned) and
reconnected separately
Twisted Pair Link Test capability
Full amplitude and timing regeneration for
retransmitted signals
Low power CMOS process with single 5V supply
100-pin QFP package
DTPO3-
TPO3-
DVDD
DVDD
LI/RX7
LI/RX6
LI/RX5
LI/RX4
DVDD
LI/RX3
LI/RX2
LI/RX1
LI/RX0
DGND
AUI1_CRS_LED
AUI2_CRS_LED
COL_LED
RESET#
TESTPIN1
TESTPIN0
DGND
EXPIN#
DAT
EXPOUT#
TCK
NC
X2
X1
NC
DVDD
1
2
3
4
5 LED_LATCH
6 AUI_LED
7 TP_BIT_LED
8 TP_POL_LED
9
10 TP_JAB_LED
11 TRAFFIC_LED
12 TP_PAR_LED
13 TP_LINK_LED
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
DM9081F
80
CDP2
79
CDN2
78
RXP2
77
RXN2
76
TXP2
75
TXN2
74
CDP1
73
CDN1
72
RXP1
71
RXN1
70
TXP1
69
TXN1
68
AGND
67
AVDD
66
RXD0+
65
RXD0-
64
RXD1+
63
RXD1-
62
RXD2+
61
RXD2-
60
RXD3+
59
RXD3-
58
RXD4+
57
RXD4-
56
RXD5+
55
RXD5-
54
RXD6+
53
RXD6-
52
RXD7+
51
RXD7-
Final
3
Version: DM9081-DS-F02
February 02, 2001
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