74AHC_AHCT573 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 7 — 8 November 2011 5 of 19
NXP Semiconductors
74AHC573; 74AHCT573
Octal D-type transparant latch; 3-state
6. Functional description
[1] H = HIGH voltage level;
h = HIGH voltage level one set-up time prior to the HIGH-to-LOW LE transition;
L = LOW voltage level;
l = LOW voltage level one set-up time prior to the HIGH-to-LOW LE transition;
Z = high-impedance OFF-state.
7. Limiting values
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] For SO20 packages: above 70 C the value of P
tot
derates linearly at 8 mW/K.
For TSSOP20 packages: above 60 C the value of P
tot
derates linearly at 5.5 mW/K.
For DHVQFN20 packages: above 60 C the value of P
tot
derates linearly with 4.5 mW/K.
Table 3. Function table
[1]
Operating mode Input Internal latch Output
OE LE Dn Qn
Enable and read register (transparent
mode)
LHLL L
HH H
Latch and read register L L l L L
hH H
Latch register and disable outputs H L l L Z
hH Z
Table 4. 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 +7.0 V
V
I
input voltage 0.5 +7.0 V
I
IK
input clamping current V
I
< 0.5 V
[1]
20 - mA
I
OK
output clamping current V
O
< 0.5 V or V
O
>V
CC
+0.5V
[1]
20 +20 mA
I
O
output current V
O
= 0.5 V to (V
CC
+0.5V) 25 +25 mA
I
CC
supply current - +75 mA
I
GND
ground current 75 - mA
T
stg
storage temperature 65 +150 C
P
tot
total power dissipation T
amb
= 40 C to +125 C
[2]
- 500 mW
