
MC74HC259A
http://onsemi.com
2
Figure 1. Logic Diagram
ADDRESS
INPUTS
A0
A1
A2
DATA IN
RESET
ENABLE
14
15
13
3
2
1
12
11
10
9
7
6
5
4
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
PIN 16 = VCC
PIN 8 = GND
NONINVERTING
OUTPUTS
LATCH SELECTION TABLE
Address Inputs
Latch Addressed
A2
A1
A0
L
H
L
H
L
H
L
H
L
H
L
H
L
H
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC
DC Supply Voltage (Referenced to GND)
0.5 to +7.0
V
Vin
DC Input Voltage (Referenced to GND)
0.5 to VCC + 0.5
V
Vout
DC Output Voltage (Referenced to GND)
0.5 to VCC + 0.5
V
Iin
DC Input Current, per Pin
±20
mA
Iout
DC Output Current, per Pin
±25
mA
ICC
DC Supply Current, VCC and GND Pins
±50
mA
PD
Power Dissipation in Still Air,
SOIC Package
TSSOP Package
500
450
mW
Tstg
Storage Temperature
65 to + 150
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress
ratings only. Functional operation above the Recommended Operating Conditions is not implied.
Extended exposure to stresses above the Recommended Operating Conditions may affect device
reliability.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Max
Unit
VCC
DC Supply Voltage (Referenced to GND)
2.0
6.0
V
Vin, Vout
DC Input Voltage, Output Voltage (Referenced to GND)
0
VCC
V
TA
Operating Temperature, All Package Types
55
+125
°C
tr, tf
Input Rise and Fall Time
VCC = 2.0 V
VCC = 3.0 V
VCC = 4.5 V
VCC = 6.0 V
0
1000
600
500
400
ns
This device contains protection
circuitry to guard against damage
due to high static voltages or electric
fields. However, precautions must
be taken to avoid applications of any
voltage higher than maximum rated
voltages to this highimpedance cir-
cuit. For proper operation, Vin and
Vout should be constrained to the
range GND v (Vin or Vout) v VCC.
Unused inputs must always be
tied to an appropriate logic voltage
level (e.g., either GND or VCC).
Unused outputs must be left open.