Low Power V.22 bis Modem
CMX868
1.7.1.3 Operating Characteristics
For the following conditions unless otherwise specified:
VDD = 2.7V to 5.5V at Tamb = -40 to +85°C,
Xtal Frequency = 11.0592 or 12.288MHz ± 0.01% (100ppm)
0dBm corresponds to 775mVrms.
DC Parameters
IDD (Powersave mode)
Notes
1, 2
1, 3
1, 3
1
Min.
–
–
–
–
–
70%
–
Typ.
2.0
1.7
2.5
3.0
5.5
–
Max.
–
3.5
5.0
6.0
11.0
–
Units
mA
mA
mA
mA
mA
VDD
VDD
mA
(Reset but not powersave, VDD = 3.0V)
(Reset but not powersave, VDD = 5.0V)
(Running, VDD = 3.0V)
(Running, VDD = 5.0V)
1
4
4
Logic '1' Input Level
Logic '0' Input Level
Logic Input Leakage Current (Vin = 0 to VDD),
(excluding XTAL/CLOCK input)
Output Logic '1' Level (lOH = 2 mA)
Output Logic '0' Level (lOL = -3 mA)
IRQN O/P 'Off' State Current (Vout = VDD
RD and RT pin Schmitt trigger input high-going
threshold (Vthi) (see Figure 13)
RD and RT pin Schmitt trigger input low-going
threshold (Vtlo) (see Figure 13)
–
–
30%
+1.0
-1.0
80%
–
–
–
–
–
–
–
0.4
1.0
VDD
V
mA
V
)
0.56VDD
0.56VDD
+ 0.6V
0.44VDD
0.44VDD
- 0.6V
–
V
RDRVN ‘ON’ resistance to VSS (VDD= 3.0V)
RDRVN ‘OFF’ resistance to VDD (VDD= 3.0V)
–
–
50
1300
70
3000
W
W
Notes:
1. At 25°C, not including any current drawn from the CMX868 pins by external circuitry
other than X1, C1 and C2.
2. All logic inputs at VSS except for RT and CSN inputs which are at VDD
3. General Mode Register b8 and b7 both set to 1.
4. Excluding RD and RT pins.
.
3.5
3
2.5
2
Vin
1.5
1
0.5
0
Vthi
Vtlo
2.5
3
3.5
4
4.5
5
5.5
Vdd
Figure 13 Typical Schmitt Trigger Input Voltage Thresholds vs. VDD
ã 2004 CML Microsystems Plc
40
D/868/9
CMLMICRO [ CML MICROCIRCUITS ]
