SN75ALS170_08 Datasheet, PDF (6/21 Pages) Texas Instruments – TRIPLE DIFFERENTIAL BUS TRANSCEIVER

SN75ALS170, SN75ALS170A
TRIPLE DIFFERENTIAL BUS TRANSCEIVER
SLLS055D – AUGUST 1987 – REVISED SEPTEMBER 1995
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP† MAX UNIT
td(OD) Differential output delay time
ALS170
ALS170A
RL = 54 Ω,
TA =25°C,
CL = 50 pF,
3
See Figure 3 _5.5
8
13
8 10.5
ALS170
RL1 = RL3 = 165 Ω, RL2 = 75 Ω,
3
8
13
ns
CL = 60 pF,
TA =25°C,
ALS170A See Figure 4
5.5
8 10.5
tsk(p) _{Pulse skew‡}
RL = 54 Ω,
See Figure 3
RL1 = RL3 = 165 Ω,
CL = 60 pF,
CL = 50 pF,
RL2 = 75 Ω,
See Figure 4
1
5
ns
1
5
ns
tsk(lim) Skew limit§
ALS170
ALS170A
ALS170
ALS170A
RL = 54 Ω,
See Figure 3
RL1 = RL3 = 165 Ω,
CL = 60 pF,
CL = 50 pF,
RL2 = 75 Ω,
See Figure 4
10
5
ns
10
5
tt(OD) Differential-output transition time
RL = 54 Ω,
See Figure 3
RL1 = RL3 = 165 Ω,
CL = 60 pF,
CL = 50 pF,
RL2 = 75 Ω,
See Figure 4
3
8
13
ns
3
8
13
† _{All typical values are at VCC = 5 V and TA = 25°C.}
‡ _{Pulse skew is defined as the | td(ODH) – t d(ODL) | of each channel.}
§ _{Skew limit is the maximum difference in propagation delay times between any two channels of one device and between any two devices. This}
parameter is applicable at one VCC and operating temperature within the recommended operating conditions.
DATA SHEET PARAMETER
VO
| VOD1 |
| VOD2 |
| VOD3 |
Vtest
∆ | VOD |
VOC
∆ | VOC |
IOS
IO
SYMBOL EQUIVALENTS
EIA/TIA-422-B
Voa, Vob
VO
Vt (RL = 100 Ω)
| | Vt | – | Vt | |
| Vos |
| Vos – Vos |
| Isa |, | Isb |
| Ixa |, | Ixb |
RS-485
Voa, Vob
VO
Vt (RL = 54 Ω)
Vt (Test Termination
Measurement 2)
Vtst
| | Vt | – | Vt | |
| Vos |
| Vos – Vos |
Iia, Iib
6
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