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74ABT244CSJX 数据表(PDF) 5 Page - Fairchild Semiconductor

部件名 74ABT244CSJX
功能描述  Octal Buffer/Line Driver with 3-STATE Outputs
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制造商  FAIRCHILD [Fairchild Semiconductor]
网页  http://www.fairchildsemi.com
标志 FAIRCHILD - Fairchild Semiconductor

74ABT244CSJX 数据表(HTML) 5 Page - Fairchild Semiconductor

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Skew
Note 13: Skew is defined as the absolute value of the difference between the actual propagation delays for any two separate outputs of the same device.
The specification applies to any outputs switching HIGH-to-LOW (tOSHL), LOW-to-HIGH (tOSLH), or any combination switching LOW-to-HIGH and/or
HIGH-to-LOW (tOST). The specification is guaranteed but not tested.
Note 14: Propagation delay variation for a given set of conditions (i.e., temperature and VCC) from device to device. This specification is guaranteed but not
tested.
Note 15: 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.)
Note 16: 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.
Note 17: This describes the difference between the delay of the LOW-to-HIGH and the HIGH-to-LOW transition on the same pin. It is measured across all
the outputs (drivers) on the same chip, the worst (largest delta) number is the guaranteed specification. This specification is guaranteed but not tested.
Capacitance
Note 18: COUT is measured at frequency f 1 MHz, per MIL-STD-883, Method 3012.
TA 40qC to 85qCTA 40qC to 85qC
VCC 4.5V–5.5V
VCC 4.5V–5.5V
Symbol
Parameter
CL 50 pF
CL 250 pF
Units
8 Outputs Switching
8 Outputs Switching
(Note 15)
(Note 16)
Max
Max
tOSHL
Pin to Pin Skew
0.8
1.8
ns
(Note 13)
HL Transitions
tOSLH
Pin to Pin Skew
0.8
1.8
ns
(Note 13)
LH Transitions
tPS
Duty Cycle
1.0
2.5
ns
(Note 17)
LH–HL Skew
tOST
Pin to Pin Skew
1.0
2.5
ns
(Note 13)
LH/HL Transitions
tPV
Device to Device Skew
1.5
3.0
ns
(Note 14)
LH/HL Transitions
Symbol
Parameter
Typ
Units
Conditions
TA 25qC
CIN
Input Capacitance
5.0
pF
VCC 0V
COUT (Note 18)
Output Capacitance
9.0
pF
VCC 5.0V


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