r6781-12 Conexant Systems, Inc., r6781-12 Datasheet - Page 13

• Manufacturer Part Number: r6781-12
• Description: Embedded Modem Family
• Manufacturer: Conexant Systems, Inc.

EmbeddedModem Family
1.2.12 Low Power Sleep Mode
Table 1-4. Current and Power Requirements
D224ATLVDSC
Operating
Sleep
Sleep
NOTE(S):
1. Test conditions: VDD = 5.0 V
2. Test conditions: VDD = 3.3 V
–
–
Idle
Stop
Mode
Current @ 25°C
DC
DC
Table 1-3. Dial Digits/Tone Pairs (2 of 2)
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.
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).
Typical
21 mA
5 mA
1 mA
for typical values; VDD = 5.25 V
for typical values; VDD = 3.6 V
The Idle mode allows reduced power consumption with automatic recovery
The Stop mode further reduces power consumption, as defined in
Current (ID)
Dial Digit
6
7
8
9
*
#
A
B
C
D
Maximum Current
Conexant
@ 0°C
22 mA
6 mA
1 mA
DC
DC
for maximum values.
for maximum values.
Frequency (Hz)
Tone 1
770
852
852
852
941
941
697
770
852
941
Power @ 25°C
100 mW
Typical
25 mW
5 mW
Power (PD)
1.2 Technical Specifications
Frequency (Hz)
Tone 2
Power @ 0°C
1477
1209
1336
1477
1209
1477
1633
1633
1633
1633
Maximum
110 mW
30 mW
5 mW
Table
1-4.
1-5