
3
PS8521I
12/02/09
PI74ST1G125
SOTiny Gate ST
Buffer with 3-State Output
AC Electrical Characteristics
Symbol
Parameter
VCC(V)
Conditions
TA = +25C
TA = -40 C to +85C
Units
Fig.
No.
Min.
Typ.
Max.
Min.
Max
tPLH
tPHL
Propagation
Delay
1.8
2.5±0.2
3.3±0.3
CL = 15pF,
RL = 1MΩ
2.0
0.8
0.5
2.8
1.8
1.3
3.7
2.5
2.0
0.8
0.5
4.1
2.8
2.2
ns
1
3
tPLH
tPHL
Propagation
Delay
3.3±0.3
CL = 50pF,
RL = 500Ω
1.5
2.6
3.4
1.5
3.7
1
3
tPZL
tPZH
Output Enable
Time
1.8
2.5±0.2
3.3±0.3
CL = 50pF,
RD = 500Ω,
RU = 500Ω,
S1 = GND for tPZH
S1 = VIN for tPZL
VIN = 2 x VCC
2
1.5
5.8
4.1
3.1
7.5
5.4
4.1
2
1.5
8.3
5.9
4.5
1
3
tPLZ
tPHZ
Output Disable
Time
1.8
2.5±0.2
3.3±0.3
CL = 50pF,
RD = 500Ω,
RU = 500Ω,
S1 = GND for tPHZ
S1 = VIN for tPLZ
VIN = 2 x VCC
2
1.5
4.9
3.6
2.8
5.9
4.8
3.4
2
1.5
1.0
6.5
5.3
3.7
1
3
CIN
Input Capaci-
tance
VIN = 0
4
pF
COUT
Output Capaci-
tance
VIN = 0
8
CPD(1)
Power Dissipa-
tion Capacitance
3.3
17
2
Notes:
1.
CPD is dened as the value of the internal equivalent capacitance which is derived from dynamic operating current consumption (ICCD) at no
output loading and operating at 50% duty cycle (see Figure 2). CPD is related to ICCD dynamic operating current by the expression:
ICCD = (CPD)(VCC)(fIN) + (ICC static).
09-0007