73M1903C-EVM Maxim Integrated Products, 73M1903C-EVM Datasheet - Page 4

• Manufacturer Part Number: 73M1903C-EVM
• Description: BOARD DEMO 73M1903C WORLDWIDE
• Manufacturer: Maxim Integrated Products

Specifications of 73M1903C-EVM

• Main Purpose: Interface, Analog Front End (AFE)
• Utilized Ic / Part: *
• Primary Attributes: *
• Secondary Attributes: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Embedded: -

73M1903C Data Sheet
1 Pin Description
The 73M1903C modem Analog Front End (AFE) IC is available in a 32-pin QFN package.
Table 1 describes the function of each pin. There are three pairs of power supply pins, VPA (analog),
VPD (digital) and VPPLL (PLL). They should be separately decoupled from the supply source in order to
isolate digital noise from the analog circuits internal to the chip. VPPLL can be directly connected to
VPD. Failure to adequately isolate and decouple these supplies will compromise device performance.
4
Pin Name
VND
VNA
VPD
VPA
VPPLL
VNPLL
RST
OSCIN
OSCOUT
GPIO(0-7)
Type
PWR
PWR
PWR
PWR
GND
GND
I/O
O
I
I
GPIO0
GPIO2
GPIO3
GPIO1
SCLK
VND
VPD
1, 22
16
2, 25
9
20
17
26
19
18
3, 4, 5, 6, 23
24, 30, 31
FS
Pin #
1
2
3
5
8
4
6
7
Table 1: 32 QFN Pin Description
73M1903C QFN 32
Description
Negative Digital Ground.
Negative Analog Ground.
Positive Digital Supply.
Positive Analog Supply.
Positive PLL Supply, shared with VPD.
Negative PLL Ground.
Master reset. When this pin is a logic 0 all registers are
reset to their default states; Weak-pulled high-default. A
low pulse longer than 100 ns is needed to reset the
device. The device will be ready within 100 µs after this
pin goes to logic 1 state.
Crystal oscillator input. When providing an external clock
source, drive OSCIN.
Crystal oscillator circuit output pin.
Software definable digital input/output pins.
73M1903C
TERIDIAN
24
23
22
19
17
20
18
21
VNPLL
VND
VPPLL
OSCIN
OSCOUT
GPIO5
GPIO4
FSD
DS_1903C_033
Rev. 5.0