HD74AC259 Datasheet, PDF (4/8 Pages) Hitachi Semiconductor – 8-bit Addressable Latch

HD74AC259
Function Table
Inputs
Outputs
Operating Mode MR E D A₀ A₁ A₂ Q₀
Q₁
Q₂
Q₃
Q₄
Q₅
Q₆
Q₇
Master reset
L HXXXXL
L
L
L
L
L
L
L
Demultiplex
L L d L L L Q=d L
L
L
L
L
L
L
(Active HIGH
L L d HL L L
Q=d L
L
L
L
L
L
Decoder when
L L d L HL L
L
Q=d L
L
L
L
L
D = H)
L L d HHL L
L
L
Q=d L
L
L
L
L L d L L HL
L
L
L
Q=d L
L
L
L L d HL HL
L
L
L
L
Q=d L
L
L L d L HHL
L
L
L
L
L
Q=d L
L L d HHHL
L
L
L
L
L
L
Q=d
Store (Do nothing) H H X X X X q₀
q₁
q₂
q₃
q₄
q₅
q₆
q₇
Addressable latch H L d L L L Q = d q₁
q₂
q₃
q₄
q₅
q₆
q₇
H L d H L L q₀
Q = d q₂
q₃
q₄
q₅
q₆
q₇
H L d L H L q₀
q₁
Q = d q₃
q₄
q₅
q₆
q₇
H L d H H L q₀
q₁
q₂
Q = d q₄
q₅
q₆
q₇
H L d L L H q₀
q₁
q₂
q₃
Q = d q₅
q₆
q₇
H L d H L H q₀
q₁
q₂
q₃
q₄
Q = d q₆
q₇
H L d L H H q₀
q₁
q₂
q₃
q₄
q₅
Q = d q₇
H L d H H H q₀
q₁
q₂
q₃
q₄
q₅
q₆
Q=d
H : High Voltage Level
L : Low Voltage Level
X : Immaterial
d : High or Low data one setup time prior to the Low-to-High Enable transition.
q : Lower case letters indicate the state of the referenced output established during the last cycle in which it was
addressed or cleared.
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
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
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
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 4 of 7