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參數(shù)資料
| 型號： | MC14C89BP |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | OC-48,24,12 SONET SDH Multi-rate Transceiver 100-HTQFP -40 to 85 |
| 中文描述： | LINE RECEIVER, PDIP14 |
| 封裝： | PLASTIC, DIP-14 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大?。?/td> | 118K |
| 代理商： | MC14C89BP |
MC14C89B, AB
Figure 1. Timing Diagram
3
MOTOROLA ANALOG IC DEVICE DATA
tT
tPLH
50%
Vout
3.0 V
0 V
S.G.
1.5 V
tPHL
Vout
VOL
VOH
RC
(Open)
90%
S.G.
50%
10%
VCC
50 pF
tT
NOTES:
S.G. set to: f = 20 kHz;
Duty Cycle = 50%;
tr, tf
5.0 ns
STANDARDS COMPLIANCE
The MC14C89B and MC14C89AB are designed to comply
with EIA–232–E (formerly RS–232), the newer EIA–562
(which is a higher speed version of the EIA–232), and CCITT
V.28 Recommendations. EIA–562 was written around
modern integrated circuit technology, whereas EIA–232
retains many of the specifications written around the
electro–mechanical circuitry in use at the time of its creation.
Yet the user will find enough similarities to allow a certain
amount of compatibility among equipment built to the two
standards. Following is a summary of the key specifications
relating to the systems and the receivers.
Parameter
EIA–232–E
EIA–562
Max Data Rate
20 kBaud
38.4 kBaud Asynchronous
64 kBaud Synchronous
Max Cable Length
50 feet
Based on cable capacitance/data rate
Transition Region
–3.0 V to +3.0 V
–3.0 V to +3.0 V
MARK (one, off)
More negative than –3.0 V
More negative than –3.3 V
SPACE (zero, on)
More positive than +3.0 V
More positive than +3.3 V
Fail Safe
Output = Binary 1
Output = Binary 1
Open Circuit Input Voltage
2.0
V
Not Specified
Slew Rate (at the driver)
30 V/
μ
s anywhere on the waveform
30 V/
μ
s anywhere on the waveform,
4.0 V/
μ
s between +3.0 V and –3.0 V
Loaded Output Voltage (at the driver)
5.0 V
3.0 k
and 7.0 k
VO
15 V for loads between
VO
3.7 V for a load of 3.0 k
Figure 2. Typical Output versus Supply Voltage
Figure 3. Typical Output Voltage
versus Temperature
5.0
VOH(Iout = –20
μ
A)
MC14C89AB
MC14C89B
TA = 25
°
C
–40
VOH(Iout = –20
μ
A)
VCC, SUPPLY VOLTAGE (V)
VOL(Iout = 3.2 mA)
VOH(Iout = –3.2 mA)
4.5
0
1.0
2.0
3.0
4.0
5.0
25
TA, AMBIENT TEMPERATURE (
°
C)
57.5
–7.5
85
5.5
5.3
5.1
4.9
4.7
0
1.0
2.0
3.0
4.0
VOH(Iout = –3.2 mA)
V
V
VOL(Iout = 3.2 mA)
MC14C89AB
MC14C89B
VCC = 5 V
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