t
參數(shù)資料
型號: LT1785HN8#PBF
廠商: Linear Technology
文件頁數(shù): 16/16頁
文件大?。?/td> 0K
描述: IC TXRX RS485/RS422 60V 8-DIP
標(biāo)準(zhǔn)包裝: 50
類型: 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù): 1/1
規(guī)程: RS422,RS485
電源電壓: 4.75 V ~ 5.25 V
安裝類型: 通孔
封裝/外殼: 8-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 8-PDIP
包裝: 管件
LT1785/LT1785A/
LT1791/LT1791A
9
178591fc
SWITCHING TIME WAVEFORMS
Figure 5. Driver Propagation Delays
DI
5V
1.5V
tPLH
tr
tSKEW
1/2 VO
VO
f = 125kHz, tr ≤ 10ns, tf ≤ 10ns
90%
10%
0V
B
A
VO
–VO
0V
90%
1.5V
tPHL
tSKEW
1/2 VO
10%
tf
VDIFF = V(A) – V(B)
1785/91 F05
Figure 6. Driver Enable and Disable Times
1.5V
2.3V
tZH(SHDN),tZH
tZL(SHDN),tZL
1.5V
tLZ
0.5V
tHZ
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
5V
0V
DE
5V
VOL
VOH
0V
A, B
178591 F06
f = 125kHz, tr ≤ 10ns, tf ≤ 10ns
Figure 7. Receiver Propagation Delays
1.5V
tPHL
RO
–VOD2
A – B
0V
1.5V
tPLH
OUTPUT
INPUT
VOD2
VOL
VOH
178591 F07
f = 125kHz, tr ≤ 10ns, tf ≤ 10ns
Figure 8. Receiver Enable and Disable Times
1.5V
tZL(SHDN), tZL
tZH(SHDN), tZH
1.5V
tLZ
0.5V
tHZ
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
5V
0V
RE
5V
0V
RO
178591 F08
f = 125kHz, tr ≤ 10ns, tf ≤ 10ns
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