MC145426 Motorola, MC145426 Datasheet - Page 4

• Manufacturer Part Number: MC145426
• Description: (MC145422 / MC145426) UNIVERSAL DIGITAL-LOOP TRANSCEIVER(UDLT)
• Manufacturer: Motorola

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DataSheet
4
NOTES:
NOTES:
MC145422 MC145426
4
U
ABSOLUTE MAXIMUM RATINGS
DIGITAL CHARACTERISTICS
RECOMMENDED OPERATING CONDITIONS
DC Supply Voltage
Voltage, Any Pin to V SS
DC Current, Any Pin (Excluding V DD ,
V SS )
Operating Temperature
Storage Temperature
DC Supply Voltage
Power Dissipation (PD = V DD , V DD = 5 V)
Power Dissipation (PD = V SS , TE = V SS )
MC145422 Frame Rate
MC145422 — MC145426 Frame Rate Slip (See Note 1)
CCI Clock Frequency (MSI = 8 kHz)
Data Clock Rate MC145422
Modulation Baud Rate (See Note 2)
Input High Level
Input Low Level
Input Current
Input Capacitance
Output High Current (Except Tx on MC145422
Output Low Current (Except Tx on MC145422
PD Output High Current (MC145426) (See Note 1)
PD Output Low Current (MC145426) (See Note 1)
Tx Output High Current
Tx Output Low Current
Tx Input Impedance (TE1 = V SS , MC145422)
Crystal Frequency (MC145426, Note 2)
PCM Tone (TE = V DD , MC145426)
Three–State Current (SO1, SO2, VD, Tx on MC145422, Tx on MC145426)
V ref Voltage (See Note 3)
X2 — Oscillator Output High Drive Current (MC145426) (See Note 4)
X2 — Oscillator Output Low Drive Current (MC145426) (See Note 4)
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and Tx and PD on MC145426)
and Tx and PD on MC145426)
1. The MC145426 crystal frequency divided by 512 must equal the MC145422 MSI Frequency
2. Assumes crystal frequency of 4.096 MHz for the MC145426 and 2.048 MHz CCI for the MC145422.
1. To overdrive PD from a low level to 3.5 V or a high level to 1.5 V requires a minimum of
2. The MC145426 crystal frequency divided by 512 must equal the MC145422 MSI frequency
3. V ref typically (9/20 V DD – V SS ).
4. Output drive when X1 is being driven from an external clock.
Rating
Parameter
(V DD = 5 V, T A = 0 to 70 C)
(Voltage Referenced to V SS )
V DD – V SS
Parameter
Symbol
T stg
T A
V
I
(T A = 0 to 70 C)
– 0.5 to V DD + 0.5
– 0.5 to + 9.0
– 85 to + 150
– 40 to + 85
Value
10
Unit
mA
V
V
C
C
TDC, RDC
V OH = 2.5 V
V OH = 4.6 V
V OH = 2.5 V
V OH = 4.6 V
V OH = 2.5 V
V OH = 4.6 V
V OH = 4.6 V
V OL = 0.4 V
V OL = 0.8 V
V OL = 0.4 V
V OL = 0.8 V
V OL = 0.4 V
V OL = 0.8 V
V OL = 0.4 V
LO1, LO2
Pins
V DD
V DD
V DD
MSI
CCI
Except LI
—
LI
800 A drive capability.
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 V in and V out be constrained to
the range V SS
Reliability of operation is enhanced if unused
inputs are tied to an appropriate logic voltage
level (e.g., either V SS or V DD ).
This device contains circuitry to protect the
0.25% for optimum performance.
0.25% for optimum operation.
– 0.36
– 100
– 450
– 1.0
– 1.7
– 3.4
– 0.7
0.36
– 90
– 10
– 22
Min
Min
100
100
450
4.5
7.9
3.5
0.8
1.7
3.5
4.0
—
—
—
—
64
—
—
—
60
—
2
(V in or V out )
2.048
2560
Max
0.25
Max
– 18
256
100
5.5
8.1
1.5
1.0
7.5
4.4
80
75
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
3
1
MOTOROLA
dBm0
MHz
MHz
Unit
Unit
mW
mW
kHz
kHz
kHz
mA
mA
mA
mA
pF
k
V DD .
%
V
V
V
V
A
A
A
A
A
A