ML145442 Datasheet, PDF (3/11 Pages) LANSDALE Semiconductor Inc. – Single-Chip 300-Baud Modem

LANSDALE Semiconductor, Inc.
ML145442, ML145443
DC ELECTRICAL CHARACTERISTICS (VDD = 5.0 V ±10%, TA = –40° to 85°C)
Characteristic
Symbol
High–Level Input Voltage
LB
VIH
Xin, TxD, Mode, SQT
Low–Level Input Voltage
LB
Xin, TxD, Mode, SQT
High–Level Output Voltage
IOH = 20 µA
IOH = 2 mA
IOH = 20 µA
CD, RxD
CD, RxD
Xout
Low–Level Output Voltage
IOL = 20 µA
IOL = 2 mA
IOL = 20 µA
CD, RxD
CD, RxD
Xout
Input Current
LB, TxD, Mode, SQT
RxA1, RxA2 (0° TA 85°C)
RxA1, RxA2 (–40° TA < 0°C)
Xin
Quiesent Supply Current (Xin or fcrystal = 3.579 MHz)
Power–Down Supply Current
VIL
VOH
VOL
Iin
IDD
Input Capacitance
Xin
Cin
All Other Inputs
VAG Output Voltage (IO = ±10 µA)
CDA Output Voltage (IO = ±10 µA)
Line Driver Feedback Resistor
VAG
VCDA
Rf
Min
VDD – 0.8
3.15
—
—
VDD – 0.1
3.7
—
—
—
—
—
—
—
—
—
—
—
—
2.4
1.1
10
Typ
—
—
—
—
—
—
VDD – 0.05
—
—
0.05
—
10
—
—
7
200
10
—
2.5
1.2
20
AC ELECTRICAL CHARACTERISTICS
(VDD = 5.0 V ±10%, TA = –40° to 85°C, Crystal Frequency = 3.579 MHz ±0.1%; See Figure 1)
Characteristic
Min
Typ
TRANSMITTER
Power Output on TxA
RL = 1.2 kΩ, RTLA = ∞
RL = 1.2 kΩ, RTLA = 5.5 kΩ
–13
–12
–10
–9
Second Harmonic Power
RL = 1.2 kΩ
—
– 56
RECEIVE FILTER AND HYBRID
Hybrid Input Impedance RxA1, RxA2
40
50
FB Output Impedance
—
16
Adjacent Channel Rejection
–48
—
DEMODULATOR
Receive Carrier Amplitude
–48
—
Dynamic Range
—
36
Bit Jitter (S/N = 30 dB, Input = –38 dBm, Bit Rate = 300 baud)
—
100
Bit Bias
—
5
Carrier Detect Threshold
(CDA = 1.2 V or CDA grounded through a 0.1 µF capacitor)
On to Off
—
–44
Off to On
—
–47
Max
—
—
0.8
1.1
—
—
—
0.1
0.4
—
±1.0
±12
±20
±10
10
300
—
10
2.6
1.3
30
Max
–11
–8
—
—
—
—
–12
—
—
—
—
—
Unit
V
V
V
V
µA
mA
µA
pF
V
V
kΩ
Unit
dBm
dBm
kΩ
kΩ
dBm
dBm
dB
µs
%
dBm
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