ISO7420_10 Datasheet, PDF (4/20 Pages) Texas Instruments – Low-Power Dual Digital Isolators

ISO7420, ISO7420M
ISO7421, ISO7421M
SLLS984D – JUNE 2009 – REVISED JULY 2010
ELECTRICAL CHARACTERISTICS
V_CC1 and V_CC2 at 5V ± 5%; T_A = –40°C to 125°C for ISO742xM, T_A = –40°C to 105°C for ISO742x
PARAMETER
TEST CONDITIONS
MIN
V_OH High-level output voltage
I_OH = –4 mA; see Figure 1.
I_OH = –20 mA; see Figure 1.
V_CC – 0.8
V_CC – 0.1
V_OL Low-level output voltage
I_OL = 4 mA; see Figure 1.
I_OL = 20 mA; see Figure 1.
V_I(HYS) Input threshold voltage hysteresis
I_IH
High-level input current
I_IL
Low-level input current
INx at 0 V or V_CC
–10
CMTI Common-mode transient immunity V_I = V_CC or 0 V; see Figure 3.
25
SUPPLY CURRENT (All inputs switching with square wave clock signal for dynamic ICC measurement)
ISO7420
I_CC1 Supply current for V_CC1
I_CC2 Supply current for V_CC2
ISO7421
DC to 1 Mbps V_I = V_CC or 0 V, 15 pF load
I_CC1 Supply current for V_CC1
I_CC2 Supply current for V_CC2
DC to 1 Mbps V_I = V_CC or 0 V, 15 pF load
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TYP MAX UNIT
4.6
V
5
0.2 0.4
V
0 0.1
400
mV
10 mA
mA
50
kV/ms
0.4
1
mA
3
6
2
4
mA
2
4
SWITCHING CHARACTERISTICS
V_CC1 and V_CC2 at 5V ± 5%; T_A = –40°C to 125°C for ISO742xM, T_A = –40°C to 105°C for ISO742X
PARAMETER
TEST CONDITIONS
MIN
t_PLH, t_PHL
PWD ⁽¹⁾
t_sk(pp)
t_sk(o)
t_r
t_f
t_fs
Propagation delay time
Pulse width distortion |t_PHL – t_PLH|
Part-to-part skew time
Channel-to-channel output skew time
Output signal rise time
Output signal fall time
Fail-safe output delay time from input power loss
See Figure 1.
See Figure 1.
See Figure 2.
(1) Also known as pulse skew.
TYP MAX UNIT
9
14 ns
0.3
3.5 ns
4 ns
3.6 ns
1
ns
1
ns
6
ms
4
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