MC33411B Motorola, MC33411B Datasheet - Page 16

• Manufacturer Part Number: MC33411B
• Description: (MC33411A/B) ANALOG CORDLESS PHONE BASEBAND
• Manufacturer: Motorola

provided to the user as a source of valuable technical
information about the MC33411. This information originates
from thorough evaluation of the device performance. This
data was obtained by using units from typical wafer lots. It is
important to note that the forgoing data and information was
from a limited number of units. By no means is the user to
assume that the data following is a guaranteed parametric.
Only the minimum and maximum limits identified in the
electrical characteristics tables found earlier in the spec are
guaranteed.
Serial Interface for the various functions will be identified by
register number and bit number. For example, bit 3/19
indicates bit 19 of register 3. Bits 5/14–11 indicates register 5,
bits 14 through 11. Please refer to Figure 1.
General Circuit Description
interface with the MC13145 UHF Wideband Receiver and
MC13146 Transmitter for applications up to 2.0 GHz. The
devices are primarily designated to be used for 900 MHz ISM
band in a CT–900, low power, dual conversion cordless
phone, but other applications such as data links with analog
processing could be developed. This device contains
complete baseband transmit and receive processing
sections, a transmit and receive PLL section, a
programmable PLL second local oscillator usable to 80 MHz,
16
The following text, graphics, tables and schematics are
Note: In the following descriptions, control bits in the MCU
The MC33411A/B is a low power baseband IC designed to
6.0
5.0
4.0
3.0
2.0
1.0
0
2.7
T A = 25 C
3.1
Figure 2. Supply Current versus
Supply Voltage (Inactive Mode)
3.5
SUPPLY VOLTAGE (V)
3.9
4.3
MCU Clock Off
4.7
FUNCTIONAL DESCRIPTION
5.1
MC33411A/B
5.5
RSSI and low battery detect circuitry and serial interface for a
microprocessor.
the reference oscillator or MCU clock outputs. This feature is
useful for systems where the MCU has an internal clock,
allowing the user to place the MC33411 into Inactive (lowest
power consumption) mode. The ”A” version is also useful for
systems where the MCU has a dedicated clock source,
allowing for lower power consumption from the MC33411 by
disabling the MCU clock output.
the MCU clock will always be driven from the MC33411.
These bits are purposefully ”hard–wired” to the enable state
to ensure proper operation of the reference oscillator and
MCU clock output even during battery discharge/recharge
cycles.
is required under normal operation conditions.
DC Current
Inactive (MC33411 ”A” version only), Standby, Receive, and
Active modes versus supply voltages. Figures 6 and 7 show
the typical behavior of current consumption in relation to
temperature.
frequency to supply current during Active mode.
”A” versions of the device have the ability to disable either
”B” versions of the device are intended for systems where
All internal registers are completely static – no refreshing
Figures 2 through 5 are the current consumption for
Figure 8 illustrates the effect of the MCU clock output
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.0
2.7
T A = 25 C
3.1
Figure 3. Supply Current versus
Supply Voltage (Standby Mode)
3.5
MOTOROLA RF/IF DEVICE DATA
SUPPLY VOLTAGE (V)
3.9
4.3
4.7
5.1
5.5