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74ACTQ657SC Folha de dados(PDF) 7 Page - Fairchild Semiconductor

Nome de Peças 74ACTQ657SC
Descrição Electrónicos  Quiet Series??Octal Bidirectional Transceiver with 8-Bit Parity Generator/Checker and 3-STATE Outputs
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Fabricante Electrônico  FAIRCHILD [Fairchild Semiconductor]
Página de início  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

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AC Electrical Characteristics for ACTQ
Note 16: Voltage Range 5.0 is 5.0V
±0.5V
Note 17: Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs within the same packaged device.
The specification applies to any outputs switching in the same direction, either HIGH-to-LOW (tOSHL) or LOW-to-HIGH (tOSLH). Parameter guaranteed by
design. Not tested.
Note 18: These delay times reflect the 3-STATE recovery time only and not the signal time through the buffers or the parity check circuitry. To assure VALID
information at the ERROR pin, time must be allowed for the signal to propagate through the drivers (B to A), through the parity check circuitry (same as A to
PARITY), and to the ERROR output after the ERROR pin has been enabled (Output Enable times). VALID data at the ERROR pin
≥ (A to PARITY) + (Output
Enable Time).
Capacitance
VCC
TA = 25°CTA = −40°C to +85°C
Symbol
Parameter
(V)
CL = 50 pF
CL = 50 pF
Units
(Note 16)
Min
Typ
Max
Min
Max
tPLH
Propagation Delay
5.01.5
5.08.0
1.58.5
ns
tPHL
An to Bn, Bn to An
tPLH
Propagation Delay
5.0
2.5
7.5
11.0
2.5
11.5
ns
tPHL
An to Parity
tPLH
Propagation Delay
5.0
2.5
6.5
10.5
2.5
11.0
ns
tPHL
ODD/EVEN to PARITY
tPLH
Propagation Delay
5.0
2.5
6.5
10.5
2.5
11.0
ns
tPHL
ODD/EVEN to ERROR
tPLH,
Propagation Delay
5.0
3.0
7.5
11.0
3.0
11.5
ns
tPHL
Bn to ERROR
tPLH
Propagation Delay
5.0
2.0
6.0
9.5
2.0
10.0
ns
tPHL
PARITY to ERROR
tPZH
Output Enable Time
5.0
2.0
6.0
9.5
2.0
10.0
ns
tPZL
OE to An/Bn
tPHZ
Output Disable Time
5.01.0
5.09.0
1.09.5
ns
tPLZ
OE to An/Bn
tPZH
Output Enable Time
5.0
2.0
6.0
9.5
2.0
10.0
ns
tPZL
OE to ERROR (Note 18)
tPHZ
Output Disable Time
5.01.0
6.09.0
1.09.5
ns
tPLZ
OE to ERROR
tPZH
Output Enable Time
5.0
2.0
6.0
9.5
2.0
10.0
ns
tPZL
OE to PARITY
tPHZ
Output Disable Time
5.01.0
5.09.0
1.09.5
ns
tPLZ
OE to PARITY
tOSHL
Output to Output Skew
5.0
0.5
1.0
1.0
ns
tOSLH
An, Bn to Bn, An (Note 17)
Symbol
Parameter
Typ
Units
Conditions
CIN
Input Capacitance
4.5
pF
VCC = 5.0V
CPD
Power Dissipation Capacitance
160.0
pF
VCC = 5.0


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