ACS102A 查看數據表（PDF） - Semtech Corporation
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ACS102A Datasheet PDF : 13 Pages
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Advanced Communications
ACS102A Data Sheet
PIN DESCRIPTION
PLCC- TQFP-
44 Pin 44 Pin
Symbol
IO
Name
16
DP1
I
Mode
Selection
Description
Selects operating mode for use
with PPLED, LED/PIN or
LASER/PIN.
PLCC- TQFP-
44 Pin 44 Pin
27 32
Sym
SETB
IO Name
Description
Force low to put LASER in
I
Setup for
Laser testing
constant transmit mode for
power adjustment. Leave
disconnected when using LEDs.
2 7 GND - Ground
Power Supply
29 34 NSB I New Slice Bar Connect to GND.
3
8
DCDB
O
Data Carrier
Detect
Modem control signal - LOW
when modems locked
Request To Modem control signal or
4
9
RTS
I Send & Data additional low frequency data
Channel 2 i/p channel input
An alternative data channel
5
10
RIO
O
Ring indicator
output
which may be for the
propagation of the RS232 Ring
indicator signal.
Data Set
Modem control signal or
6 11 DSR O Ready & Data additional low frequency data
Channel 3 o/p channel output
7
12
LMN
O
Laser monitor
A pull down current equal to
1/100 th of the Laser current.
8 13 RxD O Received Data Received data
9 14
DR3
I
Data Rate
Select
The DR(1:3) inputs select the
Data Rates, see p2.
10 15 XLI I Oscillator
11 16 XLO O Crystal
Connect fundamental parallel
resonance crystal with padding
capacitors to GND
12 17 GND - Ground
Power Supply ground.
13 18
DP5
I
Mode
Selection
Selects operating mode for use
with PPLED, LED/PIN or
LASER/PIN.
14 19 VD+
-
+ve power
supply
Power Supply, 3.3-5.25 Volts
15 20 TxD I Transmit Data Transmitted data
30 35 GND - Ground
Ground Supply
31 -
NC
- Not connected Not connected
32 36
CNT
IO
Capacitor
Integration
Integrating capacitor is placed
between CNT and GND of
value 10nF-47nF with an XTAL
of 27-5Mhz
- 37 GND - Ground
Ground Supply
33 38
34 39
PINN
PINP
I PIN Cathode Connections to a PIN diode or
I PIN Anode LASER monitor diode.
35
36
40
41
LAN
LAP
IO
IO
LED Cathode
LED Anode
Connections to LED or LASER
37 42 VA+ - +ve Supply Power supply, 3.3-5.25 Volts
2
38 43
A 10 nF capacitor is connected
between this pin and ground for
CTX
IO
Capacitor for
Laser transmit
LASER applications. It is used
in monitoring of the average
transmit power. Can be left
disconnected when using LEDs.
39 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
40 1
RII
I
Ring indicator which may be for the
input
propagation of the RS232 Ring
indicator signal.
Indicates quality of line. If a
16 21
ERL
O
Error Detector
coding infringement is detected,
ERD goes High. Reset by
PORB to Low
Data Terminal Modem contrrol signal or
17 22 DTR I Ready/Data / additional low frequency data
Channel 3 i/p channel input
'Heart beat' Indicates power up and modem
18 23 HBT O Lock & power lock, pulses slowly when
up indicator locked, fast unlocked.
19 24
HD1
I
Handshake
Delay
Sets the Handshake bandwidth,
see p4
41 2
DP4
I
Mode
Selection
Selects operating mode for use
with PPLED, LED/PIN or
LASER/PIN.
42 3
DP3
I
Mode
Selection
Selects operating mode for use
with PPLED, LED/PIN or
LASER/PIN.
43 4 VD+ - +ve Supply Power Supply, 3.3-5.5 Volts
44 5
DP2
I
Mode
Selection
Selects operating mode for use
with PPLED, LED/PIN or
LASER/PIN.
Clear To Send Modem control signal or
20 25 CTS O & Data
additional low frequency data
Channel 2 o/p channel output
21 26
HD2
I
Handshake
Delay
Sets the Handshake bandwidth,
see p4
22
27
PORB
I
Power-on-
Reset
Will reset the device when
PORB = 0. Connect to an RC
circuit as in figure 4, so a reset
performed on power-up.
23 28
24 29
DR1
DR2
I
Data Rate
Select
The DR(1:3) inputs select the
Data Rates, see p3
25 30
26 31
28 33
DM3
DM2
DM1
I
Diagnostic
Modes
DM(1:3) input select for
Diagnostic Modes such as local
loopback and remote loopback
7
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