English
Language : 

74FR543 Datasheet, PDF (4/6 Pages) Fairchild Semiconductor – Octal Latched Transceiver with 3-STATE Outputs
◁
AC Electrical Characteristics
Symbol
Parameter
tPLH
Propagation Delay
tPHL
An to Bn or Bn to An
tPLH
Propagation Delay
tPHL
LEAB to B, LEBA to A
tPZH
Output Enable Time
tPZL
tPHZ
Output Disable Time
tPLZ
TA = +25°C
VCC = +5.0V
CL = 50 pF
Min
Typ
Max
1.3
3.0
4.7
1.3
2.6
4.7
2.3
5.7
8.5
2.3
4.0
8.5
2.3
4.3
7.4
2.3
4.9
7.4
1.6
3.9
7.0
1.6
3.5
7.0
TA = 0°C to +70°C
VCC = +5.0V
CL = 50 pF
Min
Max
1.3
4.7
1.3
4.7
2.3
8.5
2.3
8.5
2.3
7.4
2.3
7.4
1.6
7.0
1.6
7.0
Units
ns
ns
ns
ns
AC Operating Requirements
Symbol
Parameter
tS(H)
tS(L)
tH(H)
tH(L)
tW(H)
Setup Time, HIGH or LOW
Dn to LE
Hold Time, HIGH or LOW
Dn to LE
LE Pulse Width HIGH
TA = +25°C
VCC = +5.0V
CL = 50 pF
Min
Typ
Max
2.5
0.5
2.5
0.1
2.0
0.0
2.0
−0.6
6.0
3.6
Extended AC Electrical Characteristics
TA = 0°C to +70°C
VCC = +5.0V
CL = 50 pF
Min
Max
2.5
2.5
2.0
2.0
6.0
Units
ns
ns
ns
TA = 0°C to +70°C
TA = 0°C to +70°C
VCC = +5.0V
VCC = +5.0V
Symbol
Parameter
CL = 50 pF
Eight Outputs Switching
CL = 250 pF
(Note 4)
Units
(Note 3)
Min
Max
Min
Max
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tOSHL
(Note 5)
Propagation Delay
An to Bn or Bn to An
Propagation Delay
LEAB to B, LEBA to A
Output Enable Time
Output Disable Time
Pin-to-Pin Skew
for HL Transitions
1.3
6.3
3.2
8.7
ns
1.3
6.3
3.2
8.7
2.3
10.2
4.2
12.8
ns
2.3
10.2
4.2
12.8
2.3
11.1
ns
2.3
11.1
1.6
7.2
ns
1.6
7.2
1.2
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
3.1
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.
www.fairchildsemi.com
4
 ▷