CMX624 데이터 시트보기 (PDF) - MX-COM Inc
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CMX624 Datasheet PDF : 25 Pages
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Bell 202 and V.23 Compatible Modem
20
CMX624 Preliminary Information
6.1.3 Operating Characteristics
For the following conditions unless otherwise specified:
VDD = 2.7V at TAMB = 25°C and VDD = 3.0V to 5.5V at TAMB = -40 to 85°C,
Xtal Frequency = 3.579545MHz ± 0.1%, 0dBm corresponds to 775mVRMS.
DC Parameters
IDD (Zero Power mode)
(Running, TX- output Off, VDD= 5.0V)
(Running, TX- output Off, VDD= 3.3V)
(Running, TX- output On, VDD= 5.0V)
(Running, TX- output On, VDD= 3.3V)
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 = 360µA)
Output Logic '0' Level (lOL = 360µA)
IRQ OUTPUT 'Off' State Current
(VOUT = VDD)
Schmitt trigger input high-going
threshold (VtHI) (see Figure 15)
Schmitt trigger input low-going
threshold (VtLO) (see Figure 15)
RLYDRV ‘ON’ resistance
to VSS (VDD= 5.0V)
FSK Modulator and Tx UART
Level at TX pin.
Twist (Mark level WRT Space level)
Tx 1200bps (V.23 mode)
Baud Rate (set by UART and Xtal
frequency)
Mark (Logical 1) Frequency
Space (Logical 0) Frequency
Tx 75bps (V.23 mode)
Baud Rate (set by UART and Xtal
frequency)
Mark (Logical 1) Frequency
Space (Logical 0) Frequency
Tx 1200bps (Bell 202 mode)
Baud Rate (set by UART and Xtal
frequency)
Mark (Logical 1) Frequency
Space (Logical 0) Frequency
Notes
Min.
Typ.
Max.
Unit
1, 2
1.0
µA
1
3.4
6.0
mA
1
1.8
3.2
mA
1
3.5
6.2
mA
1
1.9
3.4
mA
3
70%
3
-1.0
VDD
30%
VDD
1.0
µA
VDD-0.4
V
0.4
V
1.0
µA
(0.56)VDD
(0.56)VDD + 0.6V V
(0.44)VDD - 0.6V
(0.44)VDD
V
38.0
TBD
Ω
4
-4.0
-3.0
-2.0
dBm
-2.0
0
2.0
dB
1194
1297
2097
1200
1300
2100
1206
1303
2103
Baud
Hz
Hz
74
75
76
Baud
388
390
392
Hz
448
450
452
Hz
1194
1197
2197
1200
1200
2200
1206
1203
2203
Baud
Hz
Hz
©1999 MX-COM, Inc.
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480180.108
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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