ISL54211 Datasheet, PDF (12/19 Pages) Intersil Corporation – MP3/USB 2.0 High Speed Switch with Negative Signal Handling/Click and Pop Suppression

ISL54211
pull-down resistor and return to the Audio or Mute mode,
depending on the condition of the CTRL pin.
Note: The ISL54211 contains an internal diode between the
IN pin and VDD pin. Whenever the IN voltage is greater than
the V_DD voltage by more than 0.7V, current will flow through
this diode into the V_DD power supply bus. An external series
resistor in the range of 100kΩ to 500kΩ is required at the IN
logic pin to limit the current when driving it with the V_BUS
voltage. This allows the V_BUS voltage from a computer or
USB hub (4.4V to 5.25V) to drive the IN pin while the V_DD
voltage is in the range of 2.7V to 3.6V. A 500kΩ resistor will
limit the current to 3µA to 5µA and still allow the IN logic
voltage to go to around 3V, which is will above the required
V_INH level of 1.4V. A smaller series resistor can be used but
more current will flow.
Typical Performance Curves T_A = +25°C, Unless Otherwise Specified
2.70
I_COM = 40mA
4.0
I_COM = 40mA
2.65
V_DD = 3.0V
3.6
V_DD = 2.5V
V_DD = 3.6V
V_DD = 3.3V
3.2
2.60
V_DD = 4.3V
2.8
V_DD = 2.7V
2.55
V_DD = 5.0V
2.4
V_DD = 5.0V
V_DD = 3.6V
2.50
-1.5
-1.0
-0.5
0
0.5
V_COM (V)
1.0
1.5
FIGURE 10. AUDIO ON-RESISTANCE vs SUPPLY VOLTAGE vs
SWITCH VOLTAGE
4
+85°C
3
+25°C
2
V_DD = 3.0V
I_COM = 40mA
-40°C
1
-1.5
-1.0
-0.5
0
0.5
V_COM (V)
1.0
1.5
FIGURE 12. AUDIO ON-RESISTANCE vs SWITCH VOLTAGE vs
TEMPERATURE
2.0
-1.5
-1.0
-0.5
0
0.5
V_COM (V)
1.0
1.5
FIGURE 11. AUDIO ON-RESISTANCE vs SUPPLY VOLTAGE vs
SWITCH VOLTAGE
25
V_DD = 3.0V
I_COM = 40mA
20
15
10
+25°C
5.0
+85°C
-40°C
0
-1.5 -1.0 -0.5 0
0.5 1.0 1.5 2.0 2.5 3.0
V_COM (V)
FIGURE 13. AUDIO ON-RESISTANCE vs SWITCH VOLTAGE vs
TEMPERATURE
12
FN6662.1
August 25, 2008