74ABT2953 查看數據表（PDF） - Philips Electronics
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74ABT2953 Datasheet PDF : 6 Pages
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Philips Semiconductors
Octal registered transceiver, inverting (3-State)
Product specification
74ABT2953
LOGIC SYMBOL
LOGIC SYMBOL (IEEE/IEC)
16 17 18 19 20 21 22 23
A0 A1 A2 A3 A4 A5 A6 A7
10
CPAB
11
CEAB
OEBA
15
14
CPBA
OEAB
9
13
CEBA
B0 B1 B2 B3 B4 B5 B6 B7
8765 432 1
11
EN1
13
EN2
15
EN3
9
EN4
10
C5
14
C6
16
2, 3, 6 1, 4, 5
8
17
7
18
6
19
5
20
4
21
3
22
2
23
1
SA00306
SA00307
FUNCTION TABLE for Register An or Bn
INPUTS
INTERNAL OPERATING
An or
Bn
CPXX
CEXX
Q
MODE
X
X
H
NC
Hold data
L
↑
L
H
↑
L
L
H
Load data
H = High voltage level
L = Low voltage level
↑ = Low-to-High transition
X = Don’t care
XX = AB or BA
NC= No change
FUNCTION TABLE for Output Enable
INPUTS INTERNAL An or Bn
OPERATING
OEXX
Q
OUTPUTS
MODE
H
X
Z
Disable outputs
L
L
L
H
H
L
Enable outputs
H = High voltage level
L = Low voltage level
X = Don’t care
XX = AB or BA
Z = High impedance ”off” state
ABSOLUTE MAXIMUM RATINGS1, 2
SYMBOL
PARAMETER
CONDITIONS
RATING
UNIT
VCC
DC supply voltage
–0.5 to +7.0
V
IIK
DC input diode current
VI < 0
–18
mA
VI
DC input voltage3
–1.2 to +7.0
V
IOK
VOUT
DC output diode current
DC output voltage3
VO < 0
output in Off or High state
–50
mA
–0.5 to +5.5
V
IOUT
DC output current
output in Low state
128
mA
Tstg
Storage temperature range
–65 to 150
°C
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.
3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
1995 Sep 06
2
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