Datasheet

 
  
   
SCLS039F − DECEMBER 1982 − REVISED SEPTEMBER 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage range, V
CC
−0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
IK
(V
I
< 0 or V
I
> V
CC
) (see Note 1) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, I
OK
(V
O
< 0 or V
O
> V
CC
) (see Note 1) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, I
O
(V
O
= 0 to V
CC
) ±35 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through V
CC
or GND ±70 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θ
JA
(see Note 2): D package 73°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DW package 57°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package 67°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
−65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” 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.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Note 3)
SN54HC590A SN74HC590A
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
V
CC
Supply voltage 2 5 6 2 5 6 V
V
CC
= 2 V 1.5 1.5
V
IH
High-level input voltage
V
CC
= 4.5 V
3.15 3.15
V
V
IH
High-level input voltage
V
CC
= 6 V 4.2 4.2
V
V
CC
= 2 V 0.5 0.5
V
IL
Low-level input voltage
V
CC
= 4.5 V
1.35 1.35
V
V
IL
Low-level input voltage
V
CC
= 6 V 1.8 1.8
V
V
I
Input voltage 0 V
CC
0 V
CC
V
V
O
Output voltage 0 V
CC
0 V
CC
V
V
CC
= 2 V 1000 1000
t
t
‡
Input transition (rise and fall) time
V
CC
= 4.5 V
500 500
ns
t
t
‡
Input transition (rise and fall) time
V
CC
= 6 V 400 400
ns
T
A
Operating free-air temperature −55 125 −40 85 °C
‡
If this device is used in the threshold region (from V
IL
max = 0.5 V to V
IH
min = 1.5 V), there is a potential to go into the wrong state from induced
grounding, causing double clocking. Operating with the inputs at t
t
= 1000 ns and V
CC
= 2 V does not damage the device; however, functionally,
the CCLK and RCLK inputs are not ensured while in the shift, count, or toggle operating modes.
NOTE 3: All unused inputs of the device must be held at V
CC
or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.