AC Operating Requirements
SOIC and SSOP packages.
Symbol
Parameter
TA = +25°C,
VCC = +5.0V,
CL = 50pF
Min. Typ. Max.
TA = –55°C to +125°C,
VCC = 4.5V to 5.5V,
CL = 50pF,
Min.
Max.
TA = –40°C to +85°C,
VCC = 4.5V to 5.5V
CL = 50pF
Min.
Max.
Units
fTOGGLE Max Toggle Frequency
100
100
tS(H) Setup Time, HIGH or 1.5
2.5
tS(L) LOW, Dn to LE
1.5
2.5
tH(H) Hold Time, HIGH or
1.0
2.5
tH(L) LOW, Dn to LE
1.0
2.5
tW(H) Pulse Width, LE HIGH 3.0
3.3
MHz
1.5
ns
1.5
1.0
ns
1.0
3.0
ns
Extended AC Electrical Characteristics
SOIC package.
Symbol
Parameter
TA = –40°C to +85°C,
TA = –40°C to +85°C,
VCC = 4.5V to 5.5V,
VCC = 4.5V to 5.5V,
CL = 50pF,
TA = –40°C to +85°C,
CL = 250pF,
8 Outputs
Switching(7)
VCC = 4.5V to 5.5V,
CL = 250pF(8)
8 Outputs
Switching(9)
Min.
Max.
Min.
Max.
Min.
Max.
Units
tPLH Propagation Delay,
tPHL
Dn to On
1.5
5.2
2.0
6.8
2.0
9.0
ns
1.5
5.2
2.0
6.8
2.0
9.0
tPLH Propagation Delay,
tPHL
LE to On
1.5
5.5
2.0
7.5
2.0
9.5
ns
1.5
5.5
2.0
7.5
2.0
9.5
tPZH Output Enable Time
1.5
6.2
2.0
8.0
2.0
10.5
ns
tPZL
1.5
6.2
2.0
8.0
2.0
10.5
tPHZ Output Disable Time
1.0
5.5
(10)
(10)
ns
tPZL
1.0
5.5
Notes:
7. This specification is guaranteed but not tested. The limits apply to propagation delays for all paths described
switching in phase (i.e., all LOW-to-HIGH, HIGH-to-LOW, etc.).
8. This specification is guaranteed but not tested. The limits represent propagation delay with 250pF load capacitors
in place of the 50pF load capacitors in the standard AC load. This specification pertains to single output switching
only.
9. This specification is guaranteed but not tested. The limits represent propagation delays for all paths described
switching in phase (i.e., all LOW-to-HIGH, HIGH-to-LOW, etc.) with 250pF load capacitors in place of the 50pF load
capacitors in the standard AC load.
10. The 3-STATE delay times are dominated by the RC network (500Ω, 250pF) on the output and has been excluded
from the datasheet.
©1993 Fairchild Semiconductor Corporation
74ABT373 Rev. 1.4
6
www.fairchildsemi.com