CMX865D2 CML Microcircuits, CMX865D2 Datasheet - Page 34

• Manufacturer Part Number: CMX865D2
• Description: FSK Modem and DTMF Codec
• Manufacturer: CML Microcircuits

FSK Modem and DTMF Codec
7.1.3
Notes:
© 2005 CML Microsystems Plc
DC Parameters
XTAL/CLOCK Input
(timings for an external clock input)
I
Logic '1' Input Level
Logic '0' Input Level
Logic Input Leakage Current (Vin = 0 to V
Output Logic '1' Level (l
Output Logic '0' Level (l
IRQN O/P 'Off' State Current (Vout = V
RD
RD and RT pin Schmitt trigger input low-going
RDRVN ‘ON’ resistance to V
RDRVN ‘OFF’ resistance to V
'High' Pulse Width
'Low' Pulse Width
DD
(excluding XTAL/CLOCK input)
threshold (Vthi) (see Figure 11)
threshold (Vtlo) (see Figure 11)
(Reset but not powersave, V
(Running, V
(Powersave mode)
and
Operating Characteristics
For the following conditions unless otherwise specified:
V
Xtal Frequency = 11.0592 or 12.288MHz ± 0.01% (100ppm)
0dBm corresponds to 775mVrms.
DD
RT pin Schmitt trigger input high-going
1. At 25°C, not including any current drawn from the CMX865 pins by external circuitry other
2. All logic inputs at V
3. General Mode Register b8-7 set to 11.
4. Excluding RD and RT pins.
= 3.0V to 3.6V at Tamb = -40 to +85°C,
than X1, C1 and C2.
Figure 11 Typical Schmitt Trigger Input Voltage Thresholds vs. V
DD
= 3.3V)
Vin
OH
OL
3.5
2.5
1.5
0.5
3
2
1
0
= -3 mA)
= 2 mA)
2.5
SS
DD
(V
DD
SS
(V
DD
DD
= 3.3V)
except for RT and CSN inputs which are at V
3
= 3.3V)
= 3.3V)
DD
)
DD
3.5
),
34
Vdd
Notes
Notes
4
1, 2
1, 3
1
4
4
4.5
0.56V
0.44V
- 0.6V
Min.
70%
80%
Min.
-1.0
30
30
-
-
-
-
-
-
-
-
Vthi
Vtlo
DD
DD
5
1300
Typ.
Typ.
2.0
2.0
3.5
50
-
-
-
-
-
-
-
-
-
-
5.5
DD
.
DD
0.56V
0.44V
+ 0.6V
3000
Max.
Max.
30%
+1.0
4.0
7.0
0.4
1.0
70
-
-
-
-
-
DD
DD
CMX865
Units
Units
D/865/3
V
V
V
mA
mA
µA
µA
µA
ns
ns
V
V
Ω
Ω
V
DD
DD
DD