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54ABT373CPCX 参数 Datasheet PDF下载

54ABT373CPCX图片预览
型号: 54ABT373CPCX
PDF下载: 下载PDF文件 查看货源
内容描述: 八路透明锁存器具有三态输出 [Octal Transparent Latch with TRI-STATE Outputs]
分类和应用: 锁存器
文件页数/大小: 16 页 / 331 K
品牌: NSC [ National Semiconductor ]
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Extended AC Electrical Characteristics  
(SOIC package)  
74ABT  
74ABT  
74ABT  
e b  
a
40 C to 85 C  
e b a  
40 C to 85 C  
T
T
§
4.5V to 5.5V  
§
§
4.5V to 5.5V  
§
A
A
e b  
a
40 C to 85 C  
T
§
§
4.5V to 5.5V  
A
e
e
V
V
CC  
CC  
e
V
CC  
e
e
250 pF  
Symbol  
Parameter  
C
50 pF  
C
L
Units  
L
e
C
250 pF  
(Note 5)  
L
8 Outputs Switching  
(Note 4)  
8 Outputs Switching  
(Note 6)  
Min  
Max  
Min  
Max  
Min  
Max  
t
t
Propagation Delay  
1.5  
1.5  
5.2  
5.2  
2.0  
2.0  
6.8  
6.8  
2.0  
2.0  
9.0  
9.0  
PLH  
ns  
ns  
ns  
ns  
D
n
to O  
n
PHL  
t
t
Propagation Delay  
LE to O  
1.5  
1.5  
5.5  
5.5  
2.0  
2.0  
7.5  
7.5  
2.0  
2.0  
9.5  
9.5  
PLH  
PHL  
n
t
t
Output Enable Time  
1.5  
1.5  
6.2  
6.2  
2.0  
2.0  
8.0  
8.0  
2.0  
2.0  
10.5  
10.5  
PZH  
PZL  
t
t
Output Disable Time  
1.0  
1.0  
5.5  
5.5  
PHZ  
(Note 7)  
(Note 7)  
PZL  
Note 4: 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 5: This specification is guaranteed but not tested. The limits represent propagation delay with 250 pF load capacitors in plce of the 50 pF load capacitors in  
the standard AC load. This specificaiton pertains to single output switching only.  
Note 6: This specification is guaranteed but not tested. The limits represent propagation delays for all paths described switching in phase (i.e., all LOW-to-HIGH,  
HIGH-to-LOW, etc.) with 250 pF load capacitors in place of the 50 pF load capacitors in the standard AC load.  
Note 7: The TRI-STATE delay times are dominated by the RC network (500X, 250 pF) on the output and has been excluded from the datasheet.  
Skew  
74ABT  
74ABT  
e b  
a
40 C to 85 C  
e b  
A
a
40 C to 85 C  
T
T
§
4.5V–5.5V  
§
§
4.5V–5.5V  
§
A
e
e
V
CC  
V
CC  
C
Symbol  
Parameter  
e
e
250 pF  
Units  
C
50 pF  
L
L
8 Outputs Switching  
(Note 3)  
8 Outputs Switching  
(Note 4)  
Max  
Max  
t
Pin to Pin Skew  
HL Transitions  
OSHL  
(Note 1)  
1.0  
1.5  
ns  
ns  
ns  
ns  
ns  
t
Pin to Pin Skew  
LH Transitions  
OSLH  
(Note 1)  
1.0  
1.4  
1.5  
2.0  
1.5  
3.5  
3.9  
4.0  
t
Duty Cycle  
PS  
(Note 5)  
LH–HL Skew  
t
Pin to Pin Skew  
OST  
(Note 1)  
LH/HL Transitions  
t
Device to Device Skew  
LH/HL Transitions  
PV  
(Note 2)  
Note 1: 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 (t ), LOW to HIGH (t ), or any combination switching LOW to HIGH and/or HIGH to LOW  
OSHL OSLH  
(t  
OST  
). This specification is guaranteed but not tested.  
Note 2: Propagation delay variation for a given set of conditions (i.e., temperature and V ) from device to device. This specification is guaranteed but not tested.  
CC  
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, etc.).  
Note 4: This specification is 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 5: 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.  
5