ISO1540
ISO1541
www.ti.com
SLLSEB6 –JULY 2012
SWITCHING CHARACTERISTICS
Over recommended operating conditions, unless otherwise noted
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
3 V ≤ VCC1, VCC2 ≤ 3.6 V
See Figure 1
R1 = 953 Ω,
C1 = 40 pF
0.7 x VCC1 to 0.3 x VCC1
0.9 x VCC1 to 900 mV
0.7 x VCC2 to 0.3 x VCC2
0.9 x VCC2 to 400 mV
8
16
14
35
17
29
23
29
48
47
Output Signal Fall Time
(SDA1, SCL1)
tf1
ns
ns
See Figure 1
R2 = 95.3 Ω,
C2 = 400 pF
Output Signal Fall Time
(SDA2, SCL2)
tf2
50 100
33 65
Low-to-High Propagation
Delay, Side 1 to Side 2
tpLH1-2
tPHL1-2
PWD1-2
0.55 V to 0.7 x VCC2
0.7 V to 0.4 V
ns
ns
ns
ns
ns
ns
High-to-Low Propagation
Delay, Side 1 to Side 2
90 181
55 123
Pulse Width Distortion
See Figure 1
R1 = 953 Ω,
R2 = 95.3 Ω,
C1, C2 = 10 pF
|tpHL1-2 – tpLH1-2
|
Low-to-High Propagation
Delay, Side 2 to Side 1
(1)
tPLH2-1
0.4 x VCC2 to 0.7 x VCC1
0.4 x VCC2 to 0.9 V
47
67 109
20 49
68
High-to-Low Propagation
Delay, Side 2 to Side 1
(1)
tPHL2-1
Pulse Width Distortion
(1)
PWD2-1
|tpHL2-1 – tpLH2-1
|
See Figure 2;
R1 = 953 Ω, C1 = 40 pF
R2 = 95.3 Ω, C2 = 400 pF
Round-trip propagation
delay on Side 1
(1)
tLOOP1
0.4 V to 0.3 x VCC1
100 165
ns
4.5V ≤ VCC1, VCC2 ≤ 5.5V
Output Signal Fall Time
See Figure 1
R1 = 1430 Ω,
C1 = 40 pF
0.7 x VCC1 to 0.3 x VCC1
0.9 x VCC1 to 900 mV
0.7 x VCC2 to 0.3 x VCC2
0.9 x VCC2 to 400 mV
6
13
10
28
11
21
18
41
20
39
35
76
tf1
ns
ns
(SDA1, SCL1)
See Figure 1
R2 = 143 Ω,
C2 = 400 pF
Output Signal Fall Time
(SDA2, SCL2)
tf2
Low-to-High Propagation
Delay, Side 1 to Side 2
tpLH1-2
tPHL1-2
PWD1-2
0.55 V to 0.7 x VCC2
0.7 V to 0.4 V
31
62
ns
ns
ns
ns
ns
ns
High-to-Low Propagation
Delay, Side 1 to Side 2
70 139
Pulse Width Distortion
See Figure 1
R1 = 1430 Ω,
R2 = 143 Ω,
C1, 2 = 10 pF
38
55
47
8
80
80
85
21
|tpHL1-2 – tpLH1-2
|
Low-to-High Propagation
Delay, Side 2 to Side 1
(1)
tPLH2-1
0.4 x VCC2 to 0.7 x VCC1
0.4 x VCC2 to 0.9 V
High-to-Low Propagation
Delay, Side 2 to Side 1
(1)
tPHL2-1
Pulse Width Distortion
(1)
PWD2-1
|tpHL2-1 – tpLH2-1
|
See Figure 2;
R1 = 1430 Ω, C1 = 40 pF
R2 = 143 Ω, C2 = 400 pF
Round-trip propagation
delay on Side 1
(1)
tLOOP1
0.4 V to 0.3 x VCC1
110 180
ns
(1) This parameter does not apply to the ISO1541 SCL1 line as it is uni-directional.
TIMING CHARACTERISTICS
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
tSP
Input Noise Filter
5
12
ns
See Figure 4
2.7 V to 0.9 V
tUVLO
Time to recover from Undervoltage Lock-out
30
50
110
µs
Copyright © 2012, Texas Instruments Incorporated
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