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参数资料
| 型号： | DS14C238WMX/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 9/13页 |
| 文件大小： | 0K |
| 描述： | IC DVR/RCVR SINGLE SUPP 24-SOIC |
| 标准包装： | 1,000 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 4/4 |
| 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： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC |
| 包装： | 带卷 (TR) |
| 其它名称： | *DS14C238WMX *DS14C238WMX/NOPB DS14C238WMX DS14C238WMX/NOPBTR DS14C238WMXTR DS14C238WMXTR-ND |
SNLS084C – MAY 1999 – REVISED APRIL 2013
Switching Characteristics
(1)
Over recommended operating conditions, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ(2)
Max
Units
DRIVER CHARACTERISTICS
tPLH
Propagation Delay LOW to HIGH
RL = 3 kΩ
0.7
4.0
μs
tPHL
Propagation Delay HIGH to LOW
CL = 50 pF
0.6
4.0
μs
tsk
Skew |tPLH–tPHL |
0.1
1.0
μs
SR1
Output Slew Rate
RL = 3kΩ to 7 kΩ, CL = 50 pF
4.0
15
30
V/
μs
SR2
Output Slew Rate
RL = 3 kΩ, CL = 2500 pF
3.0
5.0
V/
μs
RECEIVER CHARACTERISTICS
tPLH
Propagation Delay LOW to HIGH
Input Pulse Width > 10
μs
2.0
6.5
μs
tPHL
Propagation Delay HIGH to LOW
CL = 50 pF
2.8
6.5
μs
tSK
Skew | tPLH–tPHL |
0.8
2.0
μs
tNW
Noise Pulse Width Rejected
2.5
1.0
μs
(1)
Receiver AC input waveform for test purposes: tr = tf = 200 ns, VIH = 3V, VIL = 3V, f = 64 kHz (128 kbits/sec). Driver AC input
waveform for test purposes: tr = tf ≤ 10 ns, VIH = 3V, VIL = 0V, f = 64 kHz (128 kbits/sec).
(2)
All typicals are given for VCC = 5.0V and TA = +25°C.
Parameter Measurement Information
Figure 2. Driver Load Circuit
Figure 3. Driver Switching Waveform
Figure 4. Receiver Load Circuit
Copyright 1999–2013, Texas Instruments Incorporated
5
Product Folder Links: DS14C238
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