73M2901/5V
Advanced Single
Chip Modem
®
TDK SEMICONDUCTOR CORP.
August 2001
DESCRIPTION
FEATURES
The 73M2901/5V is a single-chip modem that
combines all the controller (DTE) and data pump
functions necessary to implement an intelligent
V.22bis data modem. This device is based on TDK
Semiconductor’s implementation of the industry
standard 8032 microcontroller core with a proprietary
multiply and accumulate (MAC) coprocessor; SigmaDelta A/D and D/A converters; and an analog front
end. The ROM and RAM necessary to operate the
modem are contained on the device. Additionally,
the 73M2901/5V provides an on-chip oscillator and
Hybrid driver.
•
The 73M2901/5V is a high performance, low
voltage, low power, single chip modem capable of
data transmission and reception through 2400bps.
The 73M2901/5V is intended for embedded
applications and battery operation. This device
offers options for a low power conventional 5 volt
design with optional internal hybrid and country
specific call progress support.
•
•
•
•
•
•
•
•
•
•
•
•
•
Low overall system chip count. True one
chip solution for embedded systems
Low operating power (~250mW @ 5V,
automatic low power standby and power
down options available)
Internal ROM and RAM for normal operation
On chip optional hybrid driver
Designed for +5 volts (+/-10%)
Data speeds:
V.22bis – 2400bps
V.22, Bell 212 – 1200bps
V.21, Bell 103 – 300bps
V.23 – 1200/75bps (w/ turnaround (PAVI))
Bell 202 – 1200bps
Bell 202 and V23 4-wire operations
Dynamic Range: -9dBm to –43 dBm
“AT” command set
Host access to modem port pins via AT
commands for custom I/O expansion
DTMF tone generation and detection
Call progress support with multinational
options (FCC68, CTR21, JATE…)
Caller ID capability
Blacklisting capability
Packaging: 32 pin PLCC or 44 pin TQFP
BLOCK DIAGRAM
ROM
RAM
ASRCH
RING
DTR
TxCLK
TxD
RxD
RxCLK
RI
CTS
DCD
DSR
RTS
MAC
CPU
AFE
USR10
USR11
RELAY
Hybrid
HBDEN
RxA
TxAP
TxAP
73M2901/5V
Advanced Single
Chip Modem
HARDWARE DESCRIPTION
The hybrid configuration is controlled by the state of
the HBDEN pin. For driving a line-coupling
transformer, HBDEN should be pulled high. For
driving an external hybrid (load on TXAP and TXAN
is 50kΩ or larger), HBDEN should be pulled low.
The 73M2901/5V is designed for a single +5 volt
supply with low power consumption (~250mW @ 5
volts). The modem supports automatic standby idle
mode. The modem will also accept a request to
power down from the DTE via hardware control. No
additional major components are required to
complete the modem core logic. The modem
provides direct firmware LED support via port pins.
The 73M2901/5V provides firmware control for a
hook relay driver (RELAY) as well as interrupt
support for a ring detect opto-coupler (RING).
INTERRUPT PINS
HARDWARE FEATURES
•
•
•
•
•
•
The external interrupt sources, DTR, ASRCH and RING,
come from dedicated input pins of the same name.
Fully self-contained. “AT” Command interpreter
and data pump
User pin available
Synchronous serial data I/O available
Asynchronous serial port
On-chip hybrid driver.
Autobaud capability from 300bps to 9600bps
DTR informs the 73M2901/5V that the host has
requested the 73M2901/5V perform a specific
function. The actual particulars of that function can
be changed by “AT” commands (described in full in
the TDK 73M2901 User’s Guide).
ASRCH informs the 73M2901/5V that the host is
passing data to the 73M2901/5V over the DTE
interface. This instructs the 73M2901/5V to begin
looking for valid “AT” commands. This pin needs to
be connected to the TXD pin.
POWER SUPPLY
Power is supplied to the 73M2901/5V via the VPD and
VPA pins. The 73M2901/5V is designed for a single
+5 (+/-10%) volt supply and for low power consumption
(~250mW @ 5 volts). Ground Reference is provided
at the VND and VNA pins.
RING informs the 73M2901/5V that the external
DAA circuitry has detected a ring signal.
CRYSTAL OSCILATOR
LOW POWER MODE
The TDK 73M2901/5V single chip modem can use
an external 11.0592 MHz reference clock or can
generate such a clock using only a crystal and two
capacitors. If an external clock is used, it should be
applied to OSCIN.
The TDK 73M2901/5V supports a low power mode.
If the low power standby option is enabled the
73M2901/5V will go into a power saving mode when
idle. The oscillator will be running, clocks will be
supplied to the UART, timers and interrupt blocks;
but no clocks will be supplied to the CPU. Instruction
processing and activity on the internal busses is
halted. Normal operation is resumed when an
interruption such as DTR, RING or ASRCH (any
character send to the 73M2901/5V) is requested or
when a reset occurs.
SPECIFYING A CRYSTAL
The manufacturer of a crystal resonator verifies its
frequency of oscillation in a test set-up, but to
ensure that the same frequency is obtained in the
application, the circuit conditions must be the same.
The TDK 73M2901/5V modem requires a parallel
mode
(antiresonant)
crystal,
the
important
specifications of which are as follows:
ANALOG LINE / HYBRID INTERFACE
The 73M2901/5V provides a differential analog
output (TXAP and TXAN) and a single-ended analog
input (RXA) with internal A/D and D/A converters. A
driver is provided for an internal hybrid function.
Mode:
Frequency:
Frequency tolerance:
The internal hybrid driver is capable of driving an
external load matching impedance and a linecoupling transformer. If an external hybrid is to be
used, the on-chip hybrid drivers can be reconfigured
to drive a minimum load of 50kΩ and thus reduce
the driver’s power consumption.
Load capacitance:
Parallel (antiresonant)
11.0592 MHz
±50
ppm
at
initial
temperature.
±50 ppm additional over full
Range.
18pF or 20pF
ESR:
Drive level:
75Ω max.
Less than 1mW.
Temperature drift:
2
73M2901/5V
Advanced Single
Chip Modem
RESET
ASYNCHRONOUS AND SYNCHRONOUS SERIAL
DATA INTERFACE
A reset is accomplished by holding the RESET pin
high. To ensure a proper power-on reset, the reset
pin must be held high for a minimum of 3µs. At
power on, the voltage at VPD, VPA, and RESET
must come up at the same time for a proper reset.
The serial data interface consists of the TXD and
RXD data paths (LSBit shifted in and out first,
respectively); and the TXCLK and RXCLK serial
clock outputs associated with the data pins;
CTS/RTS flow control; DCR, DSR and DTR. In
synchronous mode, the data is passed at the bit rate
(tolerance is +1%, -2.5%).
PIN DESCRIPTIONS
POWER PIN DESCRIPTION
PIN NAME
32-PIN 44-PIN
TYPE
DESCRIPTION
VPA
15
16
I
Positive analog voltage (+ Analog Supply)
VNA
21
22
I
Negative analog voltage. (Analog Ground)
VPD
6, 25,
29
2,12,
27, 33
I
Positive digital voltage (+ Digital Supply)
VND
5, 22,
26
11, 24,
44, 28
I
Negative digital voltage. (Digital Ground)
ANALOG INTERFACE PIN DESCRIPTION
PIN NAME
32-PIN 44-PIN
TYPE
DESCRIPTION
RXA
20
21
I
Receive analog data
TXAN
16
17
O
Transmit Analog -
TXAP
17
18
O
Transmit Analog +
HBDEN
14
15
I
2w/4w hybrid driver enable pin
0 = Driver configured for 50kΩ or greater load (Tie to VND)
1 = Driver configured for driving line-coupling transformer (Tie to
VPD)
VBG
19
20
O
Analog Band Gap voltage reference pin (0.1µF to VNA)
VREF
18
19
O
Analog reference voltage pin (0.1µF to VNA)
EXTERNAL INTERRUPTS PIN DESCRIPTIONS
PIN NAME
32-PIN 44-PIN
TYPE
DESCRIPTION
RING
2
39
I
External interrupt – Line interface ring detection circuitry input
ASRCH
1
38
I
External interrupt – Autobaud detection, connected to TXD
DTR
32
37
I
External interrupt – DTE DTR signal input
3
73M2901/5V
Advanced Single
Chip Modem
PIN DESCRIPTIONS (continued)
OSCILLATOR PIN DESCRIPTION
PIN NAME
32-PIN 44-PIN
TYPE
DESCRIPTION
OSCIN
24
26
I
Crystal input for internal oscillator, also input for external
source.
OSCOUT
23
25
O
Crystal oscillator output.
DIGITAL INTERFACE PIN DESCRIPTION
PIN NAME
32-PIN 44-PIN
TYPE
DESCRIPTION
RESET
13
9
I
Resets 73M2901/5V
RXCLK
31
36
O
Receive Data Synchronous Clock
RXD
30
35
O
Serial output to DTE.
TXCLK
28
31
O
Transmit Data Synchronous Clock
TXD
27
30
I
Serial data input from DTE.
USR10
12
8
I/O
This pin can optionally be configured as an active low detect
pin. This can be used to implement such functions as “parallelpick-up”, “line-in-use”, or “seize” detect.
USR11
11
7
I/O
Programmable I/O port. This pin can ooptionnaly be used to
control an external switch for Caller ID decoding operations.
RTS (USR12)
10
6
I
Request to Send
CTS (USR13)
9
5
O
Clear to Send
DSR (USR14)
8
4
O
Data Set Ready
DCD (USR15)
7
3
O
Data Carrier Detect
RI (USR16)
4
43
O
Ring Indicator
RELAY (USR17)
3
40
O
Relay driver output
4
73M2901/5V
Advanced Single
Chip Modem
ELECTRICAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Operation above maximum rating may permanently damage the device.
PARAMETER
RATING
Supply Voltage
-0.5V to +7.0V
Pin Input Voltage
-0.5V to VPD + 0.5V
Storage Temperature
-55ºC to 150°C
RECOMMENDED OPERATING CONDITIONS
PARAMETER
RATING
Supply Voltage
+5.0V (+/-10%)
Oscillator Frequency
11.0592MHz +/- 50ppm
Operating Temperature
-40C to +85°C
TRANSMITTER
PARAMETER
CONDITIONS
MIN
NOM
MAX
UNIT
ITU Guard Tone Power
550Hz (relative to carrier)
-5
-3.5
-2
dB
1800Hz (relative to carrier)
-8
-6.5
-5
dB
Calling Tone
1300Hz
-11
-9.0
dBm0
Answer Tone Power
2225/2100Hz
-11
-9.0
dBm0
DTMF Transmit Power
High band tones
-8.0
-6.0
dBm0
Low band tones
-10
-8.0
1
1
1
1
dBm0 refers to the TDK recommended DAA ( 8dB loss from Transmit pins to the line and 5dB loss from the line to the Receive pin). Results
may vary depending on selected DAA. 0dBm = 0.775Vrms. dBm = 10log {Vrms2/[(1mW)(600Ω)]}
5
73M2901/5V
Advanced Single
Chip Modem
ELECTRICAL SPECIFICATIONS (continued)
MAXIMUM TRANSMIT LEVELS
Vref=2.25V; VPA=5.0V
Transmit type
Maximum differential line
level (dBm0)
QAM
-5.5
DPSK
-3.4
FSK
-1.2
DTMF (high tone)
-6.0
DTMF (low tone)
-8.0
DTMF (total)
-3.9
Vref=1.25V; VPA=5.0V
QAM
-9.6
DPSK
-7.4
FSK
-5.3
DTMF (high tone)
-7.9
DTMF (low tone)
-9.8
DTMF (total)
-5.7
Note: The recommended DAA (see the TDK 73M2901 Reference Manual) will result in approximately 8dB loss from the transmit pins to the
phone line. This includes the loss through the line matching impedance (475Ω resistor), transformer, and solid state off-hook relay.
6
73M2901/5V
Advanced Single
Chip Modem
ELECTRICAL SPECIFICATIONS (continued)
TRANSMITTER
PARAMETER
Gain Adjust
Tolerance
Transmit Gain Boost
Total Harmonic
Distortion (THD)
Intermod Distortion
Power Supply
Rejection Ratio
CONDITIONS
By step
MIN
NOM
MAX
UNIT
-0.3
0
0.3
dB
SFR 96h bit 1 (TXBOOST) = 1
1Khz sine wave at output (TXAP-TXAN)
1.5Vpk(2.7dBm) for Vref=1.25V
2.4Vpk (6.8dBm) for Vref=2.25V
nd
rd
THD = 2 and 3 harmonic.
4.8
5.1
5.4
dB
-50
dB
-33
dB
-20
dB
below
low
tone
30.0
dB
MAX
UNIT
At output (TXAP-TXAN)
1.0kHz, 1.2 kHz sine waves summed
2.0Vpk for Vref=1.25V
2.4Vpk for Vref=2.25V
each unwanted
frequency
component
Refer to CTR21 specification for complete
description of requirements
sum of
unwanted
frequency
components in
pass band
-30 dBm signal at VPA
300Hz – 30kHz. Measured TXAP to TXAN.
RECEIVER
PARAMETER
CONDITIONS
MIN
NOM
Carrier Detect On
Tip and Ring
-43.0
dBm0
Carrier Detect Off
Tip and Ring
-48.0
dBm0
Carrier Detect Hysteresis
Tip and Ring
Receive Level
Tip and Ring
Idle Channel Noise
0.2kHz - 4.0kHz
1
1
2.0
-43.0
-70
7
dB
1
-9.0
dBm0
-65
dB
73M2901/5V
Advanced Single
Chip Modem
ELECTRICAL SPECIFICATIONS (continued)
RECEIVER (continued)
PARAMETER
TEST CONDITION
MIN
NOM
MAX
UNITS
Input Impedance
RXA
150
---
---
kΩ
Receive Gain
Boost
SFR 96h bit 2 (Rxgain) = 1
2.7
3.0
3.3
dB
Maximum Input
Level at RXA
VREF=1.25V
0.587
Vpk
VREF=2.25V
1.069
Vpk
Total Harmonic
Distortion (THD)
1kHz 450mV-pk on RXA
-50
dB
nd
-70
rd
THD = 2 and 3 harmonic.
DC CHARACTERISTICS
PARAMETER
Input Low Voltage
(Except OSCIN,RESET)
SYMBOL
VIL
CONDITION
MIN
-0.5
NOM
MAX
0.2Vcc
UNIT
V
Input Low Voltage
OSCIN,RESET
VIL
-0.5
0.2 Vcc
V
Input High Voltage
(Except OSCIN,RESET)
VIH
0.5 Vcc
Vcc + 0.5
V
Input High Voltage
OSCIN,RESET
VIH
0.7 Vcc
Vcc + 0.5
V
Output Low Voltage
(Except OSCOUT)
VOL
IOL = 4mA
0.45
V
Output Low Voltage
OSCOUT
VOLOSC
IOL = 3.0mA
0.7
V
Output High Voltage
(Except OSCOUT)
VOH
IOH = -4mA
Vcc – 0.45
V
Output High Voltage
OSCOUT
VOHOSC
IOH =-3.0mA
Vcc – 0.9
V
Input Leakage Current
(Except OSCIN)
IIH
Vss < Vin < Vcc
Input Leakage Current
OSCIN
IIH
Vss < Vin < Vcc
8
1
1
µA
30
µA
73M2901/5V
Advanced Single
Chip Modem
ELECTRICAL SPECIFICATIONS (continued)
DC CHARACTERISTICS
PARAMETER
SYMBOL
CONDITION
Maximum Power Supply
Normal Operation @ 5V
HBDEN pulled high
IDD1
Maximum Power Supply
Normal Operation @ 5V
HBDEN pulled low
Maximum Digital Power
Supply @ 5V
MIN
NOM
MAX
UNIT
30pF/pin
51
62
mA
IDD1
30pF/pin
35
43
mA
IDDd
30pF/pin
31
37
mA
Maximum Analog Power
supply @ 5V
HBDEN pulled high
IDDah1
30pF/pin
20
25
mA
Maximum Analog Power
Supply @ 5V
HBDEN pulled low
IDDah0
30pF/pin
4
6
mA
Maximum Power Supply
Idle Mode @ 5V
IDD2
30pF/pin
11
15
mA
Maximum Power Supply
Power Down Mode @ 5V
IDD3
30pF/pin
4
10
µA
5V Operations
9
73M2901/5V
Advanced Single
Chip Modem
DC CHARACTERISTICS
PARAMETER
CONDITION
MIN
NOM
MAX
UNIT
Vbg
Vcc=5V
1.19
1.25
1.31
V
Vref
Vcc=5V – no boost
1.19
1.25
1.31
V
Vref
Vcc=5V + internal boost
2.14
2.25
2.36
V
3.8
4.2
4.5
V
5 Volts detection threshold
10
73M2901/5V
Advanced Single
Chip Modem
FIRMWARE DESCRIPTION2
FIRMWARE FEATURES
An “AT” command interpreter provides command
and configuration of the 73M2901/5V. This provides
the user a uniform interface to control the modem in
embedded applications.
•
•
•
•
The signal processing is performed by obtaining
data from and providing data to the integrated A/D
converter. A MAC hardware processor is provided
for computation.
•
To provide maximum flexibility, the system host
processor can access the internal RAM and Control
Register space in the modem. This will allow the
OEM user to modify parameters such as filter
response, transmit levels through the AT command
set using proprietary commands.
The host
processor can also access the modem I/O port pins,
providing extended I/O capability.
•
•
•
•
FIRMWARE REQUIREMENTS
The modem always powers up in the idle (on hook)
mode. “AT” commands are issued via the serial
interface from the host. All modem configuration
commands are received in this manner. The data
modem firmware is contained in an internal ROM.
The firmware will automatically enter a power saving
idle mode if the modem is on hook and there are no
incoming host commands.
The modem
automatically powers up upon receiving the next
command. This power up sequence occurs without
delay to the host. This function, while saving power,
is transparent to the host processor and can be
disabled by the host via an “AT” command. The
host can also program the modem to power down
via external pin (DTR) or via a firmware command.
2
For a detailed description of the firmware consult the TDK
73M2901 User’s Manual.
11
“AT” command set
Supports data standards through V.22bis
Provides DAA control firmware (e.g. ring detect,
hook control, line in use detection support)
Multinational Call progress support (FCC68,
CTR21, JATE…)
Caller ID capability
FSK demodulation (V23 or Bell202)
st nd
Intra 1 /2 ring CID data operations
Post Line reversal CID data operations
Interfaces with standard V.24/EIA-232 (3-5 volt
inverted level) serial interface using the built in
serial port and firmware control of port pins
Provides tone generation and detection, four
imprecise and four precise call progress detect
filters
Host access to program RAM provided
User access to modem functions
73M2901/5V
Advanced Single
Chip Modem
DESIGN CONSIDERATIONS
transformer directly (with the required impedance
matching series resistor). Used in this configuration,
there is loss associated in both the receive path and
transmit path.
TDK Semiconductor’s single chip modem solutions
include all the basic modem functions. This makes
these devices adaptable to a variety of applications.
The line interface circuit shown on the following
3
page represents the basic components and values
for interfacing the TDK 73M2901/5V analog pins to
the telephone line.
Unlike digital logic circuitry, modem designs must
contend with precise frequency tolerances and verify
low level analog signals, to ensure acceptable
performance. Using good analog circuit design
practices will generally result in a sound design.
The crystal oscillator should be held to a 50ppm
tolerance.
Following
are
additional
recommendations that should be taken into
consideration when starting new designs.
MODEM PERFORMANCE
CHARACTERISTICS
The curves presented in this data sheet define
modem IC performance under a variety of line
conditions typical of those encountered over public
service telephone lines.
LAYOUT CONSIDERATIONS
Good analog/digital design rules must be used to
control system noise in order to obtain high
performance in modem designs. The more digital
circuitry present in the application, the more
attention to noise control is needed.
BER VS. SNR
This test represents the ability of the modem to
operate over noisy lines with a minimum amount of
data transfer errors. Since some noise is generated
in the best dial up lines, the modem must operate
with the lowest signal to noise ratio (SNR) possible.
Better modem performance is indicated by test
curves that are closest to the BER axis. A narrow
spread between curves representing the four line
parameters
indicates
minimal
variation
in
performance while operating over a range of
aberrant operating conditions. Typically a DPSK
modem will exhibit better BER performance test
curves receiving in the low band (answer mode)
than in the high band (originate mode).
High speed, digital devices should be locally
bypassed, and the telephone line interface and the
modem should be located next to each other near
where the telephone line connection is accessed. It
is recommended that power supplies and ground
traces should be routed separately to the analog and
digital portions on the board. Digital signals should
not be routed near low level analog or high
impedance analog traces.
The 73M2901/5V should be considered a high
performance analog device. A 10µF electrolytic
capacitor in parallel with a 0.1µF Ceramic capacitor
should be placed between VPD and VND as well as
between VPA and VNA. A 0.1µF ceramic capacitor
should be placed between VREF and VNA as well
as VBG and VNA. Use of ground planes and large
traces on power is recommended.
BER VS. RECEIVE LEVEL
This test measures the dynamic range of the
modem. Because signal levels vary widely over dial
up lines, the widest possible dynamic range is
desirable. The SNR is held constant at the indicated
values as the Receive level is lowered from very a
very high to a very low signal level. The width of the
bowl of these curves, taken at the BER point is the
measure of the dynamic range.
The 73M2901/5V is the first of a series of parts with
different and/or additional features. In order to insure
full lay out compatibility for all the series, it is
recommended to implement three additional
resistors in the schematics as shown in the
recommended schematics arrangement (R11, R12
and R13).
TELEPHONE LINE INTERFACE
Transmit levels at the line are dependent on the
interface used between the pins and the line. In
order to save having to provide external op-amps to
drive the line coupling transformer, the analog
outputs (TXAP and TXAN) have the capability to be
used as the hybrid drivers for connecting to the
3
TDK73M2901 Demo boards use the line interface shown on the
following page. Other designs may have different requirements
and thus will require different component values or a different
configuration. With the shown configuration, there is
approximately an 8dB loss in the transmit path, and approximately
a 5dB loss in the receive path.
12
73M2901/5V
Advanced Single
Chip Modem
RXA
R3
21K
R4
5.1K
R1
TXAP
T1
475
C1
Telephone
Line
0.033m
TXAN
Midcom 671-8005
Recommended Line Interface
VCC
1
C1
GND
C2
+
Y1
10uF
27PF
C3
2
11.0592 MHZ
GND
R1
33PF
10K
VCC
VCC
GND
GND
13
24
23
6
25
29
26
5
22
JP1
TTL V24
signals
interface
U1
RING
RELAY
0R
VPA
VNA
VREF
VBG
HBDEN
RXA
TXAP
TXAN
15
21
18
19
14
VPA
VNA
C4
100nF
C5
100nF
R2
21K
VCC
20
17
16
R3
5.1K
R4
470
3 T1
2
3
R11
USR11
USR10/LIU
GND
DCD
DSR
CTS
RI
RTS
DTR
RXC
RXD
TXD
ASRCH
TXC
11
12
HEADER 10
7
8
9
4
10
32
31
30
27
1
28
RST
OSCIN
OSCOUT
VPD
VPD
VPD
VND
VND
VND
2901_P32
To
--> RS232
level shifter
--> Host
microprocessor
10
9
8
7
6
5
4
3
2
1
C7
.033UF
R12
0R
2
SEC
PRI
4
1
671-8005
R13
nc
Recommended Schematics Arrangement
13
73M2901/5V
Advanced Single
Chip Modem
TYPICAL USA APPLICATION SCHEMATICS
14
73M2901/5V
Advanced Single
Chip Modem
BER VS SNR
BER VS RECEIVE LEVEL
V.22bis
3002A Line, 5.0V, 25C
V.22bis
3002A Line, 5.0V, 25C
1.00E+00
1.00E+00
1.00E-01
Answer
1.00E-01
Origina te
Answer
1.00E-02
1.00E-02
Bit Error Rate
Bit Error Rate
Origina te
1.00E-03
1.00E-03
1.00E-04
1.00E-04
1.00E-05
1.00E-05
1.00E-06
1.00E-06
10 11 12 13 14 15
4
16 17 18 19
8 12 16 20 24 28 32 36 40 44
Receive Level (dBm)
SNR (Rx Signal/ 3k Hz) (dB)
15
73M2901/5V
Advanced Single
Chip Modem
32 PIN PLCC PIN-OUT
PIN
PIN NAME
PIN
PIN NAME
1
ASRCH
17
TXAP
2
RING
18
VREF
3
RELAY
19
VBG
4
RI
20
RXA
5
VND
21
VNA
6
VPD
22
VND
7
DCD
23
OSCOUT
8
DSR
24
OSCIN
9
CTS
25
VPD
10
RTS
26
VND
11
USR11
27
TXD
12
USR10
28
TXCLK
13
RESET
29
VPD
14
HBDEN
30
RXD
15
VPA
31
RXCLK
16
TXAN
32
DTR
44 PIN TQFP PIN-OUT
PIN
PIN NAME
PIN
PIN NAME
PIN
PIN NAME
PIN
PIN NAME
1
N/C
12
VPD
23
N/C
34
N/C
2
VPD
13
N/C
24
VND
35
RXD
3
DCD
14
N/C
25
OSCOUT
36
RXCLK
4
DSR
15
HBDEN
26
OSCIN
37
DTR
5
CTS
16
VPA
27
VPD
38
ASRCH
6
RTS
17
TXAN
28
VND
39
RING
7
USR11
18
TXAP
29
N/C
40
RELAY
8
USR10
19
VREF
30
TXD
41
N/C
9
RESET
20
VBG
31
TXCLK
42
N/C
10
N/C
21
RXA
32
N/C
43
RI
11
VND
22
VNA
33
VPD
44
VND
16
73M2901/5V
Advanced Single
Chip Modem
MECHANICAL DRAWINGS
0.453 (11.51)
0.449 (11.40)
PIN NO. 1 IDENT.
0.595 (15.11)
0.585 (14.86)
0.553 (14.05)
0.549 (13.94)
0.495 (12.57)
0.485 (12.32)
0.023
0.029
0.140 (3.56)
0.123 (3.12)
0.095 (2.41)
0.078 (1.98)
0.050
0.013
0.021
0.026
0.032
0.400 REF
(10.16 REF)
0.300 REF
(7.62 REF)
0.430 (10.92)
0.390 (9.91)
0.530 (13.46)
0.490 (12.45)
32-Pin PLCC
17
0.045 (1.140)
0.020 (0.508)
73M2901/5V
Advanced Single
Chip Modem
MECHANICAL DRAWINGS (continued)
12.0 BSC (0.48)
12.0 BSC (0.48)
0.37 (0.0148) Typ.
0.80 (0.032) Typ.
INDEX
1
10.0 BSC (0.40)
1.35 (.053)
1.45 (.057)
.05 (0.002)
.15 (0.006)
44-Pin TQFP (JEDEC LQFP)
18
73M2901/5V
Advanced Single
Chip Modem
PACKAGE PIN DESIGNATIONS
(Top View)
N/C
27
TXD
DCD
3
31
TXCLK
26
VND
DSR
4
30
TXD
CTS
5
29
N/C
RTS
6
28
VND
USR11
7
27
VPD
USR10
8
26
OSCIN
RESET
9
25
OSCOUT
10
24
VND
10
24
OSCIN
USR11
11
23
OSCOUT
22
VND
N/C
19
20
TXAN
TXAP
VREF
VBG
RXA
VNA
VND
11
23
12 13 14 15 16 17 18 19 20 21 22
VPD
18
VPA
HBDEN
21
32-Lead PLCC
73M2901-32IH/5
VPD
N/C
VNA
RTS
VPD
RXA
25
VBG
9
VREF
CTS
Pin 1
Indicator
TXAP
8
TXAN
DSR
17
N/C
32
7
16
RXD
2
DCD
15
RXCLK
VPD
28
13
14
DTR
TXCLK
6
RESET
USR20
44 43 42 41 40 39 38 37 36 35 34
33
VPD
12
RING
1
VPD
USR10
RELAY
N/C
29
Pin 1
Indicator
N/C
30
VPA
RXD
31
HBDEN
RXCLK
32
N/C
DTR
1
RI
USR20
2
5
N/C
RING
3
VND
RELAY
4
VND
N/C
RI
CAUTION: Use handling procedures necessary for a
static sensitive component.
44-Pin TQFP
73M2901-IGT/5
ORDERING INFORMATION
PART DESCRIPTION
73M2901/5V
32-Pin Plastic Leaded Chip Carrier
73M2901/5V
44-Pin Thin Quad Flat Pack
ORDER NUMBER
PACKAGING MARK
73M2901-32IH/5
73M2901-32IH
73M2901-IGT/5
73M2901-IGT
No responsibility is assumed by TDK Semiconductor Corporation for use of this product nor for any infringements of patents and trademarks
or other rights of third parties resulting from its use. No license is granted under any patents, patent rights or trademarks of
TDK Semiconductor Corporation, and the company reserves the right to make changes in specifications at any time without notice.
Accordingly, the reader is cautioned to verify that the data sheet is current before placing orders.
TDK Semiconductor Corp., 2642 Michelle Dr., Tustin, CA 92780, (714) 508-8800, FAX (714) 508-8877, www.tdksemiconductor.com
TDK Semiconductor Corporation
08/30/01 Rev. D
19