CMX624 CML Microcircuits, CMX624 Datasheet - Page 20

• Manufacturer Part Number: CMX624
• Description: V.23-Bell 202 Modem
• Manufacturer: CML Microcircuits

V23 / Bell 202 Modem
1.7.1.3 Operating Characteristics
Details in this section represent design target values and are not currently guaranteed.
For the following conditions unless otherwise specified:
Notes:
Notes:
DC Parameters
FSK Modulator and Tx UART
2001 Consumer Microcircuits Limited
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
Schmitt trigger input high-going threshold (Vthi)
Schmitt trigger input low-going threshold (Vtlo)
RLYDRV ‘ON’ resistance to V
Level at TOP pin.
Twist (Mark level WRT Space level)
Tx 1200bits/sec (V.23 mode)
Tx 75bits/sec (V.23 mode)
Tx 1200bits/sec (Bell 202 mode)
Tx 150bits/sec (Bell 202 mode)
DD
(excluding XTAL/CLOCK input)
Baud Rate (set by UART and Xtal frequency)
Mark (Logical 1) Frequency
Space (Logical 0) Frequency
Baud Rate (set by UART and Xtal frequency)
Mark (Logical 1) Frequency
Space (Logical 0) Frequency
Baud Rate (set by UART and Xtal frequency)
Mark (Logical 1) Frequency
Space (Logical 0) Frequency
Baud Rate (set by UART and Xtal frequency)
Mark (Logical 1) Frequency
Space (Logical 0) Frequency
(see Figure 11)
(see Figure 11)
(Running, TXON o/p Off, V
(Running, TXON o/p Off, V
(Running, TXON o/p On, V
(Running, TXON o/p On, V
(Zero Power mode)
V
Xtal Frequency = 3.579545MHz
DD
1. At 25 C, not including any current drawn from the CMX624 pins by external circuitry other
2. All logic inputs at V
3. Excluding RD, RT and XTAL/CLOCK pins.
4. At V
= 2.7V at Tamb = 25°C and V
than X1, C1 and C2.
DD
= 5.0V, Tx o/p level control bit set to ‘1’; load resistance greater than 40k .
OH
OL
= 360 A)
= 360 A)
SS
DD
DD
DD
DD
SS
(V
= 5.0V)
= 3.3V)
= 5.0V)
= 3.3V)
DD
except for RT and CSN inputs which are at V
= 5.0V)
DD
DD
0.1%, 0dBm corresponds to 775mVrms.
)
DD
= 3.0V to 5.5V at Tamb = -40 to +85°C,
),
20
Notes
Notes
1, 2
1
1
1
1
3
3
4
0.56V
0.44V
V
- 0.6V
1194
1297
2097
1194
1197
2197
DD
Min.
70%
Min.
-1.0
-4.0
-2.0
388
448
149
385
485
74
-
-
-
-
-
-
-
-
-
-0.4
DD
DD
1200
1300
2100
1200
1200
2200
Typ.
38.0
Typ.
-3.0
390
450
150
387
487
1.0
3.4
1.8
3.5
1.9
75
0
-
-
-
-
-
-
-
-
DD
.
0.56V
0.44V
+ 0.6V
1206
1303
2103
1206
1203
2203
Max.
Max.
TBD
+2.0
30%
+1.0
-2.0
392
452
151
389
489
6.0
3.2
6.2
3.4
0.4
1.0
76
-
-
-
DD
DD
CMX624
D/624/6
Baud
Baud
Baud
Baud
dBm
Unit
Unit
V
V
mA
mA
mA
mA
dB
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
V
V
V
V
DD
DD
A
A
A