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Infineon Technologies Electronic Components Datasheet

DM207 Datasheet

Modem Side IC

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DM207
Modem Side IC for DAA 2000
Package Dimensions in Inches (mm)
Integrated Circuit
.169 (4.3)
.177 (4.5)
.007 (.19)
m.011 (.30)
max.
o.0016
U.c(1.10)
.021 (.55)
.011 (.28)
.029 (.75)
.014 (.38)
12° typ.
.303 (7.70)
.311 (7.90)
.031 (.80)
.041 (1.05)
.019 (.50)
.029 (.75)
.248 (6.3)
.255 (6.5)
.002 (.06)
.005 (.15)
8° max.
t4FEATURES
e• V.32, V.34, and V.90 (56 Kb/s) Compatibility
• Supports Ring Detect and Wake On Ring
e• On-hook Monitor Provides for Caller ID and
Voice/Fax/Data Steer Functions
h• On-hook Line Voltage Measurement
• Line Current Sense
S• 3.0 Volt (Modem Side) Operation
ta• Low Gain Drift
• Universal Applications
a• 100% Low Profile Surface Mount
www.D t4U.com• Compatible to FCC Part 68
DESCRIPTION
The DM207 is one component in the DAA2000 circuit, which consists of a
DL207 Line-Side Integrated Circuit, a DM207 Modem-Side Integrated Circuit
and two IL388DAA Linear Optocouplers. When configured along with other
components, the final circuit provides a full featured Optical DAA.
All of the components in the kit are packaged in easy to assemble, surface
mount format. The DM207 comes in a standard 24-pin TSSOP package. A
complete DAA circuit can be assembled directly onto a mother board using
less than 2 square inches of board space, eliminating costly special or hand
insert operations.
The DAA2000 is a full featured Optical DAA that takes into consideration the
needs of today’s portable and multimedia equipment. Added features of the
DAA2000 such as line current sense, snooping and line V/F make the circuit
ideal for enhanced modems which support speaker phones, answering
machines, simultaneous voice and fax, caller ID and voice/fax/data steering.
The DAA2000’s unique “Wake on Ring” feature allows it to draw no current
when idle until ringing is detected. The DAA2000 circuit may be powered from
an unregulated power source such as a battery up to 7.0 volts.
Maximum Ratings
Supply voltage, VDDVSS .......................................................................... 7.0 V
Input voltage......................................................................VSS –0.5 V to VDD+0.5 V
Package dissipation at 25°C ambient ......................................................1.2 W
Derate linearly from 25°C.................................................................0.03 W/°C
Storage temperature ............................................................... –20°C to +85°C
Operating temperature................................................................ 0°C to +70°C
w.DataShee2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA
wwww.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
wOSRAM Opto Semiconductors GmbH & Co. OHG • Regensburg, Germany
www.osram-os.com • +49-941-202-7178
1
July 14, 2000-14


Infineon Technologies Electronic Components Datasheet

DM207 Datasheet

Modem Side IC

No Preview Available !

Table 1. Pin Configurations—DM207 (Modem Side)
Pin Symbol
I/O Function
1, 24 C1A, C1B
CapacitorA 15 nF capacitor (C1) is tied between pin #1 and pin #24. This controls the RC time constant
for the receive optical active bias control.
2 VREF
O Internal 1.25 V precision bandgap reference. Active when Off-hook or in On-hook Monitor mode only. Do
not load this output with more than 1.0 µA.
3 C2
CapacitorTypically this 68 nF capacitor (C2) is tied between pin #3 and ground. C2 sets the integrator
response for the lowpass filter of the optical active bias circuit.
4 RXCT
O RX CathodeThe receiver photo diode return is connected to pin #7 of the IL388DAA (U3).
5 RXAN
I RX AnodeThe receive photo diode input and is connected to pin #8 of the IL388DAA (U3). This input
is sensitive to noise relative to VSS and should be routed to minimize pickup from other signal sources.
6 ONHKML I On-hook Monitor LowLogic Low activates the On-hook Monitor function, which includes an internal
pull-up resistor.
7 ONHKM
I On-hook MonitorLogic High activates the On-hook Monitor function, which includes an internal pull
down resistor.
8 HIN
Diagnostic pin. Do not connect.
9 SRVAN
10 SRVCT
I Servo AnodeThe transmit servo photo diode input is connected to pin #3 of the IL388DAA (U4). This input
is sensitive to noise level relative to VDD and should be routed to minimize pickup from other signal sources.
O Servo CathodeThe transmit servo photo diode current return and is connected to pin #4 of the IL388DAA
(U4). This pin is clamped at 0.8 V.
11 TXAMP
I TX Amplifier InputThe current (summing mode) input for transmit audio. This input is at ACREF voltage
±5.0 mV. A 120 k resistor between this point and transmit audio source gives unity voltage gain into the
telephone line.
12 VDD
13 LEDCT
P Power supply voltage. 3.0 to 7.0 V.
O LED CathodeThe transmit linear optocoupler LED cathode is connected to pin #1 of the IL388DAA (U4).
The printed circuit board layout should minimize capacitive coupling between this trace and the SRVAN and
RXAN traces.
14 VSS
15 AUDOUT
P Power supply return (Ground).
O Auxiliary amplifier outputwill drive a 300 load.
16 AUDIN
I Inverting input for an auxiliary amplifier. The non-inverting input is internally tied to ACREF.
17 TXBIAS
O A 25.5 k, 1% resistor to ground sets the transmit DC bias point of U4.
18 ACREF
I/O Audio DC reference for transmit and receive signals. 1.25 V reference @ 1.0 µA maximum output. It can be
overdriven by connecting an external voltage source. This output is turned off during idle mode (On-hook,
and no snoop).
19 RXOUT
O Audio Output 6.0 dB relative to the telephone line. It has 300 drive capability. This output goes to a high
impedance state in idle mode. DC voltage is ACREF.
20 OFFHK
I OFF-HOOKPositive assertion Off-hook control input. Includes an internal pull-down resistor.
21 OFFHKL
I OFF-HOOK LOWNegative assertion Off-hook control input. Includes an internal pull-up resistor
22 RNG
O RING DetectIn IDLE modes it outputs a 4 ms positive pulse for each full cycle or half cycle depending on
the value of pin #7 on the DL207. In snoop or Off-hook modes, the output is the same as LSTAT.
23 LSTAT
O Line StatusIn idle mode, this pin outputs a series of pulses whose frequency is directly related to line volt-
age (V/f function). In snoop or Off-hook modes, the output will give a single pulse if the line current is sud-
denly decreased indicating a parallel phone going Off-hook.
24 C1A
See above pin #1.
2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
OSRAM Opto Semiconductors GmbH & Co. OHG • Regensburg, Germany
www.osram-os.com • +49-941-202-7178
2
DM207
July 14, 2000-14


Part Number DM207
Description Modem Side IC
Maker Infineon Technologies
Total Page 4 Pages
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