480227 Datasheet, PDF (555/794 Pages) Texas Instruments – Pocket Data Book

873
DUAL 4-BIT D-TYPE LATCHES WITH 3-STATE OUTPUTS
● 3-State Buffer-Type Outputs Drive Bus Lines Directly
● Bus-Structured Pinout
● Asynchronous Clear
OE
Logic Diagram
LE
CLR
D1
FUNCTION TABLE
D2
INPUTS
OE
CLR
ENABLE
LE
D
OUTPUT
L
L
X
X
L
L HHH
H
L HH L
L
D3
L
H
L
X
Q0
HXXX
Z
D4
ELECTRICAL CHARACTERISTICS AND RECOMMENDED OPERATING CONDITIONS
PARAMETER MAX or MIN ALS AS UNIT
ICC
MAX
31 129 mA
IOH
MAX
-2.6 -15 mA
IOL
MAX
24 48 mA
R
C1
Q1
1D
R
C1
Q2
1D
R
C1
Q3
1D
R
C1
Q4
1D
TIMING REQUREMENTS AND SWITCHING CHARACTERISTICS
PARAMETER
INPUT
OUTPUT
MAX or MIN ALS AS
tw
CLR low
LE high
tsu
15
5
10
5
MIN
10
2
th
7 4.5
tPLH
14 9.5
D
Q
MAX
tPHL
14 7.5
tPLH
22 13
LE
Q
MAX
tPHL
21 7.5
tPHL
CLR
Q
MAX
20
9
tPZH
18 6.5
OE
Q
MAX
tPZL
18 10.5
tPHZ
10 7.5
OE
Q
MAX
tPLZ
15 7.5
UNIT: ns
550
: OBSOLETED or NOT RECOMMENDED NEW DESIGNS