参数资料
型号: SN65HVD2
厂商: Texas Instruments, Inc.
元件分类: RS-485
英文描述: EXTENDED COMMON-MODE RS-485 TRANSCEIVERS
中文描述: 扩展共模RS - 485收发
文件页数: 9/25页
文件大小: 527K
代理商: SN65HVD2
SLLS552D DECEMBER 2002 REVISED APRIL 2005
www.ti.com
9
PARAMETER MEASUREMENT INFORMATION
NOTES:
Test load capacitance includes probe and jig capacitance (unless otherwise specified).
Signal generator characteristics: rise and fall time < 6 ns, pulse rate 100 kHz, 50% duty cycle, Zo = 50
(unless otherwise specified)
II
IO
IO
VOD
50 pF
27
27
VOC
0 V or 3 V
Figure 1. Driver Test Circuit, V
OD
and V
OC
Without Common-Mode Loading
IO
IO
VOD
60
VTEST
0 V or 3 V
375
375
VTEST = 20 V to 25 V
Figure 2. Driver Test Circuit, V
OD
With Common-Mode Loading
VOD
50
RL = 54
CL = 50 pF
Signal
Generator
1.5 V
1.5 V
3 V
0 V
tPLH
tPHL
VOD(H)
VOD(L)
90%
0 V
10%
tr
tf
INPUT
OUTPUT
Figure 3. Driver Switching Test Circuit and Waveforms
VOC
50
Signal
Generator
A
B
27
27
50 pF
D
VA
VB
VOC
VOC(PP)
VOC(SS)
3.25 V
1.75 V
Figure 4.
Driver V
OC
Test Circuit and Waveforms
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