RC224ATL/224ATLV
1.0 Functional Description
EmbeddedModem Family
1.2 Technical Specifications
Table 1-3. Dial Digits/Tone Pairs (2 of 2)
Tone 1
Frequency (Hz)
Tone 2
Frequency (Hz)
Dial Digit
6
7
8
9
*
#
A
B
C
D
770
852
852
852
941
941
697
770
852
941
1477
1209
1336
1477
1209
1477
1633
1633
1633
1633
1.2.12 Low Power Sleep Mode
To conserve power, the RC224ATLV has two selectable sleep (power-down)
modes – Idle and Stop. If enabled by the IDLEN0 and IDLN1 inputs, the selective
sleep mode is entered whenever the modem is active. The sleep mode indicator
output, SLEEP, is provided to allow external circuits to be powered down when
the modem is in Idle or Stop mode.
The Idle mode allows reduced power consumption with automatic recovery
without additional circuitry. If Idle mode is selected, the modem exits Idle mode
and returns to full operation whenever a ring signal occurs, the DTE writes to the
modem (parallel interface), or WAKEUP input, normally tied to DTR or TXD, is
asserted (serial interface).
The Stop mode further reduces power consumption, as defined in Table 1-4.
Table 1-4. Current and Power Requirements
Current (ID)
Power (PD)
Mode
Typical
Maximum Current
Typical
Maximum
Current @ 25°C
@ 0°C
Power @ 25°C
Power @ 0°C
Operating
21 mA
5 mA
22 mA
6 mA
100 mW
25 mW
110 mW
30 mW
Sleep–Idle
Sleep–Stop
NOTE(S):
1 mA
1 mA
5 mW
5 mW
1. Test conditions: VDD = 5.0 VDC for typical values; VDD = 5.25 VDC for maximum values.
2. Test conditions: VDD = 3.3 VDC for typical values; VDD = 3.6 VDC for maximum values.
D224ATLVDSC
Conexant
1-5
CONEXANT [ CONEXANT SYSTEMS, INC ]
