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| 型号： | LT1237CSW#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/8页 |
| 文件大小： | 0K |
| 描述： | IC TXRX 5V RS232 ADV LOPWR28SOIC |
| 标准包装： | 27 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 3/5 |
| 规程： | RS232 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC |
| 包装： | 管件 |
3
LT1237
ELECTRICAL C
C
HARA TERISTICS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Any Driver
Output Voltage Swing
Load = 3k to GND
Positive
q
5.0
7.5
V
Negative
q
– 6.3
– 5.0
V
Logic Input Voltage Level
Input Low Level (VOUT = High)
q
1.4
0.8
V
Input High Level (VOUT = Low)
q
2.0
1.4
V
Logic Input Current
0.8V
≤ VIN ≤ 2V
q
520
A
Output Short-Circuit Current
VOUT = 0V
±917
mA
Output Leakage Current
Shutdown VOUT = ±30V (Note 4)
q
10
100
A
Data Rate (Note 7)
RL = 3k, CL = 2500pF
120
kBaud
RL = 3k, CL = 1000pF
250
kBaud
Slew Rate
RL = 3k, CL = 51pF
15
30
V/
s
RL = 3k, CL = 2500pF
4
7
V/
s
Propagation Delay
Output Transition tHL High to Low (Note 5)
0.6
1.3
s
Output Transition tLH Low to High
0.5
1.3
s
Any Receiver
Input Voltage Thresholds
Input Low Threshold (VOUT = High)
0.8
1.3
V
Input High Threshold (VOUT = Low)
1.7
2.4
V
Hysteresis
q
0.1
0.4
1.0
V
Input Resistance
VIN = ±10V
3
5
7
k
Output Leakage Current
Shutdown (Note 4) 0
≤ VOUT ≤ VCC
q
110
A
Receivers 1, 2, 3, 4
Output Voltage
Output Low, IOUT = – 1.6mA
q
0.2
0.4
V
Output High, IOUT = 160A (VCC = 5V)
q
3.5
4.2
V
Output Short-Circuit Current
Sinking Current, VOUT = VCC
–10
– 20
mA
Sourcing Current, VOUT = 0V
10
20
mA
Propagation Delay
Output Transition tHL High to Low (Note 6)
250
600
ns
Output Transition tLH Low to High
350
600
ns
Receiver 5 (LOW ISUPPLY RX)
Output Voltage
Output Low, IOUT = – 500A
q
0.2
0.4
V
Output High, IOUT = 160A (VCC = 5V)
q
3.5
4.2
V
Output Short-Circuit Current
Sinking Current, VOUT = VCC
–2
–4
mA
Sourcing Current, VOUT = 0V
2
4
mA
Propagation Delay
Output Transition tHL High to Low (Note 6)
1.0
3
s
Output Transition tLH Low to High
0.6
3
s
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: Testing done at VCC = 5V and VON/OFF = 3V, unless otherwise
specified.
Note 3: Supply current is measured as the average over several charge
pump burst cycles. C+ = 1.0
F, C– = 0.1F, C1 = C2 = 0.2F. All outputs
are open, with all driver inputs tied high.
Note 4: Measurements in shutdown are performed with VON/OFF ≤ 0.1V.
Supply current measurements using driver disable are performed with
VDRIVER DISABLE ≥ 3V.
Note 5: For driver delay measurements, RL = 3k and CL = 51pF. Trigger
points are set between the driver’s input logic threshold and the output
transition to the zero crossing (tHL = 1.4V to 0V and tLH = 1.4V to 0V).
Note 6: For receiver delay measurements, CL = 51pF. Trigger points are
set between the receiver’s input logic threshold and the output transition
to standard TTL/CMOS logic threshold (tHL = 1.3V to 2.4V and tLH = 1.7V
to 0.8V).
Note 7: Data rate operation guaranteed by slew rate, short-circuit current
and propagation delay tests.
The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2)
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