A C 1 0 1 L F E A T U R E S
CPU
Chipset
PCI
Bus
MII
TX
RX
MAC
Control
AC101L
NIC 10/100 BASE-TX Application
Fully integrated TX/FX PHY transceiver (MII/RMII-
to TX magnetics or FX-Optics)
Very low system cost
Simplified board design
HP Auto-MDIX detects and corrects crossed cables
Automatically accommodates link partner polarity
Very small footprint to allow reduced real-estate in
space-critical applications such as PCMCIA cards
Industry's lowest power Fast Ethernet PHY
Accommodates either a 3.3V or a 2.5V power supply
Low power and intelligent power management
Standby mode to conserve power
S U M M A R Y O F B E N E F I T S
10/100BASE-TX SINGLE-PHY TRANSCEIVER
PRODUCT
PRODUCT
Brief
Brief
A C 1 0 1 L
Single port 10BASE-T/100BASE-TX/100BASE-FX,
Full Duplex or Half Duplex
Power Supply: 2.5V or 3.3V
Integrated voltage regulator to allow operation from
single supply source
Single port MII or RMII
HP Auto-MDIX
Very small package 48-pin TQFP
49 sq. mm footprint
Very low power Typical < 200mW (100BASE-TX)
Fully compliant with IEEE 802.3 / 802.3u
Baseline wander correction
Multi-function programmable LED outputs
Reverse polarity detection and correction
Read/write register bit indication
Industrial temperature (3.3V only)
ALTIMA COMMUNICATIONS, INC. CONFIDENTIAL
PC Motherboard 10/100BASE-TX Application
MII Bus
CPU
Chipset
PCI
Bus
PCI Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
TX
RX
AC101L
CNR/ACR Slot
The AC101L provides all of the required features of an
MII/RMII compliant 10/100TX/FX Ethernet transceiver. The
AC101L has the lowest power consumption of any other single-
port solution.
With a power dissipation of less than 200 mW, the AC101L is
the industry's lowest-power Fast Ethernet PHY. It features an
integrated voltage regulator, and can be supplied by either a 2.5V
or a 3.3V power source. In addition, the AC101L has several
intelligent power-down states that conserve power, yet allow
products based on it to automatically turn on when needed. This
feature is extremely useful in portable and power sensitive
applications such as laptop LAN card adapters. Because most
laptop users do not remove their LAN PC cards when working
remotely, this feature results in a noticeably extended battery life
for laptop computers.
Network Tolerance
The AC101L includes features that simplify the installation and
maintenance of local area networks. One such feature is the HP
Auto-MDIX capability, which automatically detects and corrects
crossed cables. With HP Auto-MDIX, the installer does not need
to know what is on the other end of the network cable; the
AC101L automatically switches its transmit and receive
circuitry to accommodate the link partner's polarity.
When all system costs are considered, such as power, heat,
components and real estate, the AC101L provides the lowest
overall system cost and most reliable design.
A C 1 0 1 L O V E R V I E W
PHY
AD4/RX D0
PHY
AD3/RX D1
PHY
AD2/RX D2
PHY
AD1/RX D3
MDC
MDIO
RESET_N
VCC33IN
XI/CLK_REF
XO
GNDOSC
GNDTX
VCC25OUT
TXP
TXN
GNDTXC
VCCPLL
RBIAS
GNDPLL
GNDRX
SD/FXEN_A
RXP
RXN
VCCRX
VCCFX
GNDFX
RXDV/CRS_DV
RXC/RMII_SEL
ISO/RXER
GND
VCC
TXER
TXC
TXEN
TXD0
TXD1
TXD2
TXD3
COL/SYMB
CRS/RPTR
GND2
VCC
INT#/PHY
AD0
LED0/TEST_N
LED1/SPD100
LED2/DUPLEX
LED3/ANEN
PD_N
1
2
3
4
5
6
7
8
9
10
11
12
48
47
46
45
44
43
42
41
40
39
38
37
13
14
15
16
17
18
19
20
21
22
23
24
36
35
34
33
32
31
30
29
28
27
26
25
AC101L
2002 by ALTIMA COMMUNICATIONS, INC.
A fully owned subsidiary of Broadcom Corporation. All rights reserved.
AC101L-PB01-R-11.01.02
ALTIMA COMMUNICATIONS, INC.
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
ALTIMA COMMUNICATIONS, INC. CONFIDENTIAL
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