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參數(shù)資料
| 型號(hào)： | MC145422 |
| 廠商： | Motorola, Inc. |
| 英文描述： | Universal Digital-Loop Transceiver |
| 中文描述： | 通用數(shù)字環(huán)路收發(fā)器 |
| 文件頁(yè)數(shù)： | 4/20頁(yè) |
| 文件大小： | 261K |
| 代理商： | MC145422 |
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MC145422
MC145426
4
MOTOROLA
ABSOLUTE MAXIMUM RATINGS
(Voltage Referenced to VSS)
Rating
Symbol
Value
Unit
DC Supply Voltage
VDD – VSS
V
– 0.5 to + 9.0
V
Voltage, Any Pin to VSS
DC Current, Any Pin (Excluding VDD,
VSS)
– 0.5 to VDD + 0.5
±
10
V
I
mA
Operating Temperature
TA
Tstg
– 40 to + 85
°
C
Storage Temperature
– 85 to + 150
°
C
RECOMMENDED OPERATING CONDITIONS
(TA = 0 to 70
°
C)
Parameter
Pins
Min
Max
Unit
DC Supply Voltage
VDD
VDD
VDD
MSI
4.5
5.5
V
Power Dissipation (PD = VDD, VDD = 5 V)
Power Dissipation (PD = VSS, TE = VSS)
MC145422 Frame Rate
—
80
mW
—
75
mW
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
μ
A
Input Capacitance
—
7.5
pF
Output High Current (Except Tx on MC145422
and Tx and PD on MC145426)
VOH = 2.5 V
VOH = 4.6 V
VOL = 0.4 V
VOL = 0.8 V
VOH = 2.5 V
VOH = 4.6 V
VOL = 0.4 V
VOL = 0.8 V
VOH = 2.5 V
VOH = 4.6 V
VOL = 0.4 V
VOL = 0.8 V
– 1.7
– 0.36
—
—
mA
Output Low Current (Except Tx on MC145422
and Tx and PD on MC145426)
0.36
0.8
—
—
mA
PD Output High Current (MC145426) (See Note 1)
– 90
– 10
—
—
μ
A
PD Output Low Current (MC145426) (See Note 1)
60
100
—
—
μ
A
Tx Output High Current
– 3.4
– 0.7
—
—
mA
Tx Output Low Current
1.7
3.5
—
—
mA
Tx Input Impedance (TE1 = VSS, MC145422)
Crystal Frequency (MC145426, Note 2)
100
—
k
4.0
4.4
MHz
PCM Tone (TE = VDD, MC145426)
Three–State Current (SO1, SO2, VD, Tx on MC145422, Tx on MC145426)
– 22
– 18
dBm0
—
±
1
μ
A
Vref Voltage (See Note 3)
X2 — Oscillator Output High Drive Current (MC145426) (See Note 4)
2
3
V
VOH = 4.6 V
VOL = 0.4 V
– 450
—
μ
A
μ
A
X2 — Oscillator Output Low Drive Current (MC145426) (See Note 4)
450
—
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
μ
A 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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