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| 型號(hào)： | MC145423DT |
| 廠商： | Freescale Semiconductor |
| 文件頁(yè)數(shù)： | 9/15頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX UDLT/ISDN 28TSSOP |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 類型： | 收發(fā)器 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-TSSOP |
| 包裝： | 管件 |
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MC145423
TELECOMMUNICATIONS
8
Figure 1. UDLT-1 Slave Timing Nonsynchronous
t p1
t p5
t p2
t p3
t w(L
)
t w(
H)
t su
5
t h1
t p4
H
IGH
IM
PE
DAN
C
E
DO
N
’T
CA
RE
VA
L
ID
t su
6
t h2
t p6
VD
SD
O1
,
SD
O2
SD
I1,
SD
I2
Rx
Tx
RE
1
TE
1
BCL
K
B1
1
B1
2
B1
3
B1
4
B1
5
B1
6
B1
7
B1
8
B1
1
B1
2
B1
3
B1
4
B1
5
B1
6
B1
7
B1
8
t dl
y3
TELECOMMUNICATIONS
5
MC145423
* To overdrive PD from a low level to 3.5 V, or a high level to 1.5 V requires a minimum of ±800
A drive capability.
* The input level into the demodulator to reliably demodulate incoming bursts. Input referenced to Vref.
DIGITAL CHARACTERISTICS (VDD = 5 V ±10%, TA = –40° to 85°C, Unless Otherwise Stated)
Parameter
Min
Max
Unit
Input High Level
VDD x 0.7
—
V
Input Low Level
—VDD x 0.3
V
Input Current (Digital Pins)
—
±1.0
A
Input Current LI
—
±100
A
Input Capacitance
—7.5
pF
Output High Current (Excluding Tx and PD)VOH = VDD – 0.5 V
–1.6
—
mA
Output Current Low (Excluding Tx and PD)VOL = 0.4V
1.6
—
mA
Tx Output High Current
VOH = 2.5 V
VOH = VDD – 0.5 V
–3.4
–2.5
—
mA
Tx Output Low Current
VOL = 0.4 V
VOL = 0.8 V
2.5
3.5
—
mA
PD Output High Current — Slave Mode*
VOH = 2.5 V
VOH = VDD – 0.5 V
–90
–10
—
A
PD Output Low Current — Slave Mode*
VOL = 0.8 V
VOL = 0.4 V
100
60
—
A
Tx, SDO1, SDO2, and VD Three-State Current
—
±10.0
A
XTAL Output High Current
VOH = VDD – 0.5 V
–450
—
A
XTAL Output Low Current
VOL = 0.4 V
450
—
A
ANALOG CHARACTERISTICS (VDD = 5 V ±10%, TA = –40° to 85°C)
Parameter
Min
Max
Unit
Modulation Differential Amplitude (RL = 440
)
LO1 to LO2
4.5
6.0
Vp-p
Modulation Differential Offset
0
40
mV
Vref Voltage, Typically 9/20 x (VDD – VSS)2.0
2.5
V
PCM Tone Level
–22
–18
dBm
Demodulator Input Amplitude*
0.05
2.5
Vpeak
Demodulator Input Impedance (LI to Vref)
50
300
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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