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74FR2245 View Datasheet(PDF) - Fairchild Semiconductor

Part Name
Description
Manufacturer
74FR2245 Datasheet PDF : 6 Pages
1 2 3 4 5 6
AC Electrical Characteristics
Symbol
Parameter
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Propagation Delay
An to Bn or Bn to An
Output Enable Time
Output Disable Time
TA = +25°C
VCC = +5.0V
CL = 50 pF
Min
Typ
Max
1.0
4.4
1.0
4.4
2.5
7.5
2.5
7.5
1.7
6.5
1.7
6.5
Extended AC Electrical Characteristics
TA = 0°C to +70°C
VCC = +5.0V
CL = 50 pF
Min
Max
1.0
4.4
1.0
4.4
2.5
7.5
2.5
7.5
1.7
6.5
1.7
6.5
Units
ns
ns
ns
Symbol
Parameter
TA = 0°C to +70°C
TA = 0°C to +70°C
Units
VCC = +5.0V
VCC = +5.0V
CL = 50 pF
CL = 250 pF
Eight Outputs Switching
(Note 4)
(Note 3)
Min
Max
Min
Max
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tOSHL
(Note 5)
Propagation Delay
An to Bn or Bn to An
Output Enable Time
Output Disable Time
Pin-to-Pin Skew
for HL Transitions
1.0
7.0
2.5
10.0
ns
1.0
7.0
2.5
10.0
2.5
10.0
ns
2.5
10.0
1.3
6.5
ns
1.3
6.5
1.7
ns
tOSLH
(Note 5)
Pin-to-Pin Skew
for LH Transitions
1.0
ns
tOST
(Note 5)
Pin-to-Pin Skew
for HL/LH Transitions
3.3
ns
Note 3: 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, 3-STATE-to-HIGH, etc.
Note 4: These specifications guaranteed but not tested. The limits represent propagation delays with 250 pF load capacitors in place of the 50 pF load
capacitors in the standard AC load. This specification pertains to single output switching only.
Note 5: Skew is defined as the absolute value of the difference between the actual propagation delays for any two outputs of the same device. The specifi-
cation applies to any outputs switching HIGH-to-LOW (tOSHL), LOW-to-HIGH (tOSLH), or HIGH-to-LOW and/or LOW-to-HIGH (tOST). Specifications guaran-
teed with all outputs switching in phase.
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