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參數(shù)資料
| 型號(hào)： | MC14C88BD |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | DL1-156PW6 |
| 中文描述： | LINE DRIVER, PDSO14 |
| 封裝： | PLASTIC, SO-14 |
| 文件頁(yè)數(shù)： | 4/8頁(yè) |
| 文件大?。?/td> | 115K |
| 代理商： | MC14C88BD |
MC14C88B
4
MOTOROLA ANALOG IC DEVICE DATA
Figure 1. Timing Diagram
tR3
VOH
tF3
tF1
tF2
tPHL
1.5 V
0 V
S.G.
3.0 V
VOUT
CL
3.0 k
VCC
VEE
S.G.
–3.3 V
tPLH
90%
3.3 V
3.0 V
–3.0 V
10%
tR2
tR1
0 V
VOL
NOTES
: S.G. set to: f = 20 kHz for Propogation Delay A
and f = 64 kHz for Propagation Delay B; Duty
Cycle = 50%; tR, tF
5.0 ns
Vout
STANDARDS COMPLIANCE
The MC14C88 is designed to comply with EIA–232–D
(formerly RS–232), the newer EIA–562 (which is a higher
speed version of the EIA–232), and CCITT’s V.28. EIA–562
was written around modern integrated circuit technology,
whereas EIA–232 retains many of the specs 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 drivers.
Parameter
EIA–232–D
EIA–562
Maximum Data Rate
20 kbaud
38.4 kbaud Asynchronous
64 kbaud Synchronous
Maximum Cable Length
50 feet
Based on cable capacitance/data rate
Maximum Slew Rate
30 V/
μ
s anywhere on the waveform
30 V/
μ
s anywhere on the waveform
4.0 V/
μ
s between +3.0 and –3.0 V
Transition Region
–3.0 to +3.0 V
–3.3 to +3.3 V
Transition Time
For UI
For 25 ms > UI > 125
μ
s, tR
For UI
125
μ
s, tR
25 ms, tR
1.0 ms
4% UI
5.0
μ
s
For UI
For UI
(within the transition region)
50
μ
s, 220 ns
50
μ
s, 220 ns
tR
tR
3.1
μ
s
2.1
μ
s
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
Short Circuit Proof
Yes, to any system voltage
Yes, to ground
Short Circuit Current
500 mA to any system voltage
60 mA to ground
Open Circuit Voltage
VOC
5.0 V
3.0 k
and 7.0 k
25 V
VOC
13.2 V
Loaded Output Voltage
VO
15 V for loads between
VO
3.7 V for a load of 3.0 k
Power Off Input Source Impedance
300
for
VO
2.0 V
300
for
VO
2.0 V
NOTE:
UI = Unit Interval, or bit time.
V.28 standard has the same specifications as EIA–232, with the exception of transition time which is listed as “l(fā)ess than 1.0 ms, or 3% of the UI,
whichever is less”.
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