DocID1989 Rev 6

11/22

M74HC595

Electrical characteristics

22

Figure 6. Test circuit

Note:

CL = 50 pF/150 pF or equivalent (includes jig and probe capacitance)

R1 = 1 KΩ or equivalent

RT = ZOUT of pulse generator (typically 50 Ω).

Table 8. Capacitive characteristics

Symbol

Parameter

Test condition

Value

Unit

VCC (V)

TA = 25 °C

-40 to 85 °C

-55 to 125 °C

Min.

Typ.

Max.

Min.

Max.

Min.

Max.

CIN

Input capacitance

5

10

10

10

pF

CPD

Power dissipation

capacitance(1)

184

1.

CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current

consumption without load. (Refer to Figure 6: Test circuitt). Average operating current can be obtained by the following

equation: ICC(opr) = CPD x VCC x fIN + ICC.

Table 9. Propagation delay time configuration

Test

Switch

tPLH, tPHL

Open

tPZL, tPLZ

VCC

tPZH, tPHZ

GND