9397 750 13251 © Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet Rev. 02 — 29 June 2004 6 of 19
Philips Semiconductors
74LVC2952A
Octal registered transceiver
7. Functional description
7.1 Function table
[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
[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 P
tot
derates linearly with 5.5 mW/K.
For T(SSOP)24 packages: above 60 °C the value of P
tot
derates linearly with 5.5 mW/K.
Table 4: Function table for register An or Bn
[1]
Operating mode Input Internal latch
An or Bn CPxx CExx
Hold data X X H NC
Load data L ↑ LL
Load data H ↑ LH
Table 5: Function table for output enable
[1]
Operating mode Input OExx Internal latch Output An or Bn
Disable outputs H X Z
Enable outputs L L L
Enable outputs L H 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
V
CC
supply voltage −0.5 +6.5 V
I
IK
input diode current V
I
<0V - −50 mA
V
I
input voltage
[1]
−0.5 +6.5 V
I
OK
output diode current V
O
>V
CC
or V
O
<0V - ±50 mA
V
O
output voltage output HIGH or LOW state
[1]
−0.5 V
CC
+ 0.5 V
output 3-state
[1]
−0.5 +6.5 V
I
O
output source or sink current V
O
= 0 V to V
CC
- ±50 mA
I
CC
,I
GND
V
CC
or GND current - ±100 mA
T
stg
storage temperature −65 +150 °C
P
tot
power dissipation T
amb
= −40 °C to +125 °C
[2]
- 500 mW
