ACS104A Ver la hoja de datos (PDF) - Semtech Corporation
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ACS104A Datasheet PDF : 12 Pages
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Advanced Communications
PIN DESCRIPTION
PLCC- TQFP-
28 Pin 44 Pin
Symbol
IO
Name
Description
16
DP1
I
Mode
Selection
Selects operating mode
- 7 GND - Ground
Power Supply
2
8
DCDB
O
Data Carrier
Detect
Modem control signal - LOW
when modems locked
Request To Modemcontrol signal or
3 9 RTS I Send & Data additional lowfrequency data
Channel 2 i/p channel input
An alternative data channel
-
10
RIO
O
Ring indicator
output
which may be for the
propagation of the RS232 Ring
indicator signal.
Data Set
Modem control signal or
4 11 DSR O Ready &Data additional lowfrequency data
Channel 3 o/p channel output
- 12
IC
O
Internally
connected
Should not be connected to.
5 13 RxD O Received Data Received data
-
14
DR3
I
Data Rate
Select
The DR(1:3) inputs select the
Data Rates, see p2.
6 15 XLI I Oscillator
7 16 XLO O Crystal
Connect fundamental parallel
resonance crystal with padding
capacitors to GND
8 17 GND - Ground
Power Supply ground.
- 18
IC
O
Internally
connected
Should not be connected to.
9 19 VD+
-
+ve power
supply
Power Supply, 3.3-5.25 Volts
10 20 TxD I Transmit Data Transmitted data
Indicates quality of line. If a
-
21
ERL
O
Error Detector
coding infringement is detected,
ERD goes High. Reset by
PORB to Low
Data Terminal Modemcontrrol signal or
11 22 DTR I Ready/Data / additional lowfrequency data
Channel 3 i/p channel input
'Heart beat' Indicates power up and modem
12 23 HBT O Lock & power lock, pulses slowly when
up indicator locked, fast unlocked.
-
24
HD1
I
Handshake
Delay
Sets the Handshake bandwidth,
see p4
Clear To Send Modemcontrol signal or
13 25 CTS O & Data
additional low frequency data
Channel 2 o/p channel output
-
26
HD2
I
Handshake
Delay
Sets the Handshake bandwidth,
see p4
ACS104A Data Sheet
PLCC- TQFP-
28 Pin 44 Pin
Sym
IO
Name
14
27
PORB
I
Power-on-
Reset
Description
Will reset the device when
PORB = 0. Connect to an RC
circuit as in figure 4, so a reset
performed on power-up.
15 28
16 29
DR1
DR2
I
Data Rate
Select
The DR(1:3) inputs select the
Data Rates, see p3
- 30
17 31
18 33
DM3
DM2
DM1
I
Diagnostic
Modes
DM(1:3) input select for
Diagnostic Modes such as local
loopback and remote loopback
- 32
IC
O
Internally
connected
Should not be connected to.
- 34 NSB I NewSlice Bar Connect to GND.
- 35 GND - Ground
Ground Supply
--
NC
- Not connected Not connected
Integrating capacitor is placed
2
19 36
CNT
IO
Capacitor
Integration
between CNT and GND of
value 10nF-47nF with an XTAL
of 27-5Mhz
20 37 GND - Ground
Ground Supply
21 38 PINN
22 39 PINP
I
I
PIN Cathode
PIN Anode
Connections to a PIN diode
23 40
24 41
LAN
LAP
IO
IO
LED Cathode
LED Anode
Connections to LED or LASER
25 42 VA+ - +ve Supply Power supply, 3.3-5.25 Volts
- 43
IC
O
Internally
connected
Should not be connected to.
26 44
TRC
I
Transmit
Current
Defines transmit current to the
LED. Minimum and maximum
values are set by connecting
TRC to GND via a resistor,
value R defined by equation on
page 2.
An alternative data channel
-
1
RII
I
Ring indicator which may be for the
input
propagation of the RS232 Ring
indicator signal.
-
2
DP4
I
Mode
Selection
Selects operating mode
27 3
DP3
I
Mode
Selection
Selects operating mode
- 4 VD+ - +ve Supply Power Supply, 3.3-5.5 Volts
28 5
DP2
I
Mode
Selection
Selects operating mode
7
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