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ZHCSMV7B February 2020 – May 2021 ISO1640 , ISO1641

PRODUCTION DATA

6.8 Safety Limiting Values

Safety limiting intends to minimize potential damage to the isolation barrier upon failure of input or output circuitry.

PARAMETER		TEST CONDITIONS	MAX	UNIT
ISO1640/1 D-8 PACKAGE
I_S	Safety input, output, or supply current⁽¹⁾	R_θJA = 106.3 °C/W, V_I = 5.5 V, T_J = 150°C, T_A = 25°C	214	mA
I_S	Safety input, output, or supply current⁽¹⁾	R_θJA = 106.3 °C/W, V_I = 3.6 V, T_J = 150°C, T_A = 25°C	327	mA
P_S	Safety input, output, or total power⁽¹⁾	R_θJA = 106.3 °C/W, T_J = 150°C, T_A = 25°C	1176	mW
T_S	Safety temperature⁽¹⁾		150	°C
ISO1640/1 DW-16 PACKAGE
I_S	Safety input, output, or supply current⁽¹⁾	R_θJA = 62.4 °C/W, V_I = 5.5 V, T_J = 150°C, T_A = 25°C	365	mA
I_S	Safety input, output, or supply current⁽¹⁾	R_θJA = 62.4 °C/W, V_I = 3.6 V, T_J = 150°C, T_A = 25°C	557	mA
P_S	Safety input, output, or total power⁽¹⁾	R_θJA = 62.4 °C/W, T_J = 150°C, T_A = 25°C,	2004	mW
T_S	Safety temperature⁽¹⁾		150	°C
ISO1644 DW-16 Package
I_S	Safety input, output, or supply current⁽¹⁾	R_θJA = 137.5 °C/W, V_I = 5.5 V, T_J = 150°C, T_A = 25°C	166	mA
	Safety input, output, or supply current⁽¹⁾	R_θJA = 137.5 °C/W, V_I = 3.6 V, T_J = 150°C, T_A = 25°C	253	mA
P_S	Safety input, output, or total power⁽¹⁾	R_θJA = 137.5 °C/W, T_J = 150°C, T_A = 25°C	910	mW
T_S	Safety temperature⁽¹⁾		150	°C

(1) The maximum safety temperature, T_S, has the same value as the maximum junction temperature, T_J, specified for the device. The I_S and P_S parameters represent the safety current and safety power respectively. The maximum limits of I_S and P_S should not be exceeded. These limits vary with the ambient temperature, T_A.

The junction-to-air thermal resistance, R_θJA, in the table is that of a device installed on a high-K test board for leaded surface-mount packages. Use these equations to calculate the value for each parameter:

T_J = T_A + R_θJA × P, where P is the power dissipated in the device.

T_J(max) = T_S = T_A + R_θJA × P_S, where T_J(max) is the maximum allowed junction temperature.

P_S = I_S × V_I, where V_I is the maximum input voltage.