HD74AC273 Datasheet, PDF (3/8 Pages) Hitachi Semiconductor – Octal D Flip-Flop

HD74AC273
Logic Diagram
D0
D1
D2
D3
D4
D5
D6
D7
CP
DQ
CP
RD
DQ
CP
RD
DQ
CP
RD
DQ
CP
RD
DQ
CP
RD
DQ
CP
RD
DQ
CP
RD
DQ
CP
RD
MR
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Please note that this diagram is provided only for the understanding of logic operations and should not be
used to estimate propagation delays.
Mode Select-Truth Table
Inputs
Operating Mode
MR
CP
D_n
Reset (Clear)
L
X
X
L
Load “1”
H
H
H
Load “0”
H
L
L
H : High Voltage Level
L : Low Voltage Level
X : Immaterial
: Low-to-High Clock Transition
Outputs
Q_n
Absolute Maximum Ratings
Item
Supply voltage
DC input diode current
DC input voltage
DC output diode current
DC output voltage
DC output source or sink current
DC V_CC or ground current per output pin
Storage temperature
Symbol
V_CC
I_IK
V_I
I_OK
V_O
I_O
I_CC, I_GND
Tstg
Ratings
–0.5 to 7
–20
20
–0.5 to Vcc+0.5
–50
50
–0.5 to Vcc+0.5
±50
±50
–65 to +150
Unit
V
mA
mA
V
mA
mA
V
mA
mA
°C
Condition
V_I = –0.5V
V_I = Vcc+0.5V
V_O = –0.5V
V_O = Vcc+0.5V
Recommended Operating Conditions
Item
Supply voltage
Input and output voltage
Operating temperature
Input rise and fall time
(except Schmitt inputs)
V_IN 30% to 70% V_CC
Symbol
V_CC
V_I, V_O
Ta
tr, tf
Ratings
2 to 6
0 to V_CC
–40 to +85
8
Unit
V
V
°C
ns/V
Condition
V_CC = 3.0V
V_CC = 4.5 V
V_CC = 5.5 V
Rev.2.00, Jul.16.2004, page 3 of 7