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74FR245 View Datasheet(PDF) - Fairchild Semiconductor

Part NameDescriptionManufacturer
74FR245 Octal Bidirectional Transceiver with 3-STATE Outputs Fairchild
Fairchild Semiconductor Fairchild
74FR245 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
Extended AC Characteristics
TA = +25°C
VCC = +5.0V
CL = 50 pF
Min
Typ
Max
1.0
2.6
3.9
1.0
1.7
3.9
2.5
5.0
7.0
2.5
4.3
7.0
1.7
3.7
6.5
1.7
3.6
6.5
TA = 0°C to +70°C
VCC = +5.0V
CL = 50 pF
Min
Max
1.0
3.9
1.0
3.9
2.5
7.0
2.5
7.0
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
5.9
2.5
7.5
ns
1.0
5.9
2.5
7.5
2.5
11.9
ns
2.5
11.9
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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