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MC145422 Datasheet(PDF) 4 Page - Motorola, Inc

No. de pieza MC145422
Descripción Electrónicos  UNIVERSAL DIGITAL-LOOP TRANSCEIVER(UDLT)
Download  20 Pages
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Fabricante Electrónico  MOTOROLA [Motorola, Inc]
Página de inicio  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC145422 Datasheet(HTML) 4 Page - Motorola, Inc

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MC145422
•MC145426
MOTOROLA
4
ABSOLUTE MAXIMUM RATINGS (Voltage Referenced to VSS)
Rating
Symbol
Value
Unit
DC Supply Voltage
VDD – VSS
– 0.5 to + 9.0
V
Voltage, Any Pin to VSS
V
– 0.5 to VDD + 0.5
V
DC Current, Any Pin (Excluding VDD,
VSS)
I
± 10
mA
Operating Temperature
TA
– 40 to + 85
°C
Storage Temperature
Tstg
– 85 to + 150
°C
RECOMMENDED OPERATING CONDITIONS (TA = 0 to 70°C)
Parameter
Pins
Min
Max
Unit
DC Supply Voltage
VDD
4.5
5.5
V
Power Dissipation (PD = VDD, VDD = 5 V)
VDD
80
mW
Power Dissipation (PD = VSS, TE = VSS)
VDD
75
mW
MC145422 Frame Rate
MSI
7.9
8.1
kHz
MC145422 — MC145426 Frame Rate Slip (See Note 1)
0.25
%
CCI Clock Frequency (MSI = 8 kHz)
CCI
2.048
MHz
Data Clock Rate MC145422
TDC, RDC
64
2560
kHz
Modulation Baud Rate (See Note 2)
LO1, LO2
256
kHz
NOTES:
1. The MC145426 crystal frequency divided by 512 must equal the MC145422 MSI Frequency
± 0.25% for optimum operation.
2. Assumes crystal frequency of 4.096 MHz for the MC145426 and 2.048 MHz CCI for the MC145422.
DIGITAL CHARACTERISTICS (VDD = 5 V, TA = 0 to 70°C)
Parameter
Min
Max
Unit
Input High Level
3.5
V
Input Low Level
1.5
V
Input Current
Except LI
LI
– 1.0
– 100
1.0
100
µA
Input Capacitance
7.5
pF
Output High Current (Except Tx on MC145422
VOH = 2.5 V
and Tx and PD on MC145426)
VOH = 4.6 V
– 1.7
– 0.36
mA
Output Low Current (Except Tx on MC145422
VOL = 0.4 V
and Tx and PD on MC145426)
VOL = 0.8 V
0.36
0.8
mA
PD Output High Current (MC145426) (See Note 1)
VOH = 2.5 V
VOH = 4.6 V
– 90
– 10
µA
PD Output Low Current (MC145426) (See Note 1)
VOL = 0.4 V
VOL = 0.8 V
60
100
µA
Tx Output High Current
VOH = 2.5 V
VOH = 4.6 V
– 3.4
– 0.7
mA
Tx Output Low Current
VOL = 0.4 V
VOL = 0.8 V
1.7
3.5
mA
Tx Input Impedance (TE1 = VSS, MC145422)
100
k
Crystal Frequency (MC145426, Note 2)
4.0
4.4
MHz
PCM Tone (TE = VDD, MC145426)
– 22
– 18
dBm0
Three–State Current (SO1, SO2, VD, Tx on MC145422, Tx on MC145426)
± 1
µA
Vref Voltage (See Note 3)
2
3
V
X2 — Oscillator Output High Drive Current (MC145426) (See Note 4)
VOH = 4.6 V
– 450
µA
X2 — Oscillator Output Low Drive Current (MC145426) (See Note 4)
VOL = 0.4 V
450
µA
NOTES:
1. To overdrive PD from a low level to 3.5 V or a high level to 1.5 V requires a minimum of
± 800 µA drive capability.
2. The MC145426 crystal frequency divided by 512 must equal the MC145422 MSI frequency
± 0.25% for optimum performance.
3. Vref typically (9/20 VDD – VSS).
4. Output drive when X1 is being driven from an external clock.
This device contains circuitry to protect the
inputs against damage due to high static
voltages or electric fields; however, it is
advised that normal precautions be taken to
avoid applications of any voltage higher than
maximum rated voltages to this high imped-
ance circuit. For proper operation it is recom-
mended that Vin and Vout be constrained to
the range VSS ≤ (Vin or Vout) ≤ VDD.
Reliability of operation is enhanced if unused
inputs are tied to an appropriate logic voltage
level (e.g., either VSS or VDD).


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