74LVC2952A 查看數據表（PDF） - NXP Semiconductors.
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74LVC2952A Datasheet PDF : 19 Pages
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Philips Semiconductors
74LVC2952A
Octal registered transceiver
7. Functional description
7.1 Function table
Table 4: Function table for register An or Bn [1]
Operating mode Input
An or Bn
CPxx
Hold data
X
X
Load data
L
↑
Load data
H
↑
Table 5: Function table for output enable [1]
Operating mode Input OExx
Internal latch
Disable outputs H
X
Enable outputs L
L
Enable outputs L
H
[1] H = HIGH voltage level;
L = LOW voltage level;
Z = high-impedance OFF-state;
NC = no change;
X = don’t care;
↑ = LOW-to-HIGH level transition.
8. Limiting values
CExx
H
L
L
Internal latch
NC
L
H
Output An or Bn
Z
L
H
Table 6: Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to
GND (ground = 0 V).
Symbol Parameter
Conditions
Min Max
Unit
VCC
supply voltage
IIK
input diode current
VI
input voltage
IOK
output diode current
VO
output voltage
VI < 0 V
VO > VCC or VO < 0 V
output HIGH or LOW state
output 3-state
−0.5
-
[1] −0.5
-
[1] −0.5
[1] −0.5
+6.5
V
−50
mA
+6.5
V
±50
mA
VCC + 0.5 V
+6.5
V
IO
output source or sink current VO = 0 V to VCC
-
±50
mA
ICC, IGND VCC or GND current
-
±100
mA
Tstg
storage temperature
−65 +150
°C
Ptot
power dissipation
Tamb = −40 °C to +125 °C [2] -
500
mW
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] For SO24 packages: above 70 °C the value of Ptot derates linearly with 5.5 mW/K.
For T(SSOP)24 packages: above 60 °C the value of Ptot derates linearly with 5.5 mW/K.
9397 750 13251
Product data sheet
Rev. 02 — 29 June 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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