Low Power V.32 bis Modem
CMX869
8.1.3 Operating Characteristics
For the following conditions unless otherwise specified:
V
DD
= AV = DV = 3.0V to 3.6V at Tamb = -40 to +85°C; V = AV = DV
;
DD
DD
SS
SS
SS
Xtal Frequency = 6.144MHz ± 0.005% (50ppm);
0dBm corresponds to 775mVrms. General Control Register bit 14 = 0 (High Rx Gain turned off).
DC Parameters
(Powersave mode)
Notes
1, 2
Min.
-
Typ.
10
Max.
-
Units
µA
I
DD
(Reset but not powersave)
(Running, AV = DV = 3.3V)
Logic '1' Input Level
Logic '0' Input Level
1, 3
1
4
-
-
3.0
8.6
-
-
-
5.0
13.0
-
30%
+1.0
mA
mA
DD
DD
70%
-
-1.0
DV
DV
DD
4
DD
Logic Input Leakage Current (Vin = 0 to DV ),
µA
DD
(excluding XTAL/CLOCK input)
Output Logic '1' Level (l = 0.6 mA)
80%
-
-1.0
-
-
-
-
-
V
DD
OH
Output Logic '0' Level (l = -1.0 mA)
+0.4
+1.0
0.56 V
V
µA
V
OL
IRQN O/P 'Off' State Current (Vout = V
RDN pin Schmitt trigger input high-going
threshold (Vthi) (see Figure 11)
)
DD
0.56 V
DD
DD
+0.6
RDN pin Schmitt trigger input low-going
threshold (Vtlo) (see Figure 11)
0.44 V
-
0.44 V
V
DD
DD
-0.6
RDRVN ‘ON’ resistance to DV (DV = 3.3V)
-
-
50
1170
70
3000
Ω
Ω
SS
DD
RDRVN ‘OFF’ resistance to DV (DV = 3.3V)
DD
DD
Notes:
1. At 25°C, not including any current drawn from the CMX869 pins by external circuitry other
than X1, C5 and C6.
2. All logic inputs at DV except CSN input which is at DV
.
SS
DD
3. General Control Register b8 and b7 both set to 1.
4. Excluding RDN pin.
2.5
2
Vthi
Vtlo
1.5
1
Vin
0.5
0
2.9
3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
Vdd
Figure 11 Typical Schmitt Trigger Input Voltage Thresholds vs. V
DD
© 2004 CML Microsystems Plc
40
D/869/4
CMLMICRO [ CML MICROCIRCUITS ]
