MC54F574J 데이터 시트보기 (PDF) - Motorola => Freescale
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MC54F574J Datasheet PDF : 3 Pages
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MC74F574
FUNCTION TABLE
Inputs
OE
CP
Dn
L
↑
l
L
↑
h
L
↑
X
H
↑
Dn
H
X
X
Internal
Register
L
H
NC
Dn
X
Outputs
Q0–Q7
L
H
NC
Z
Z
Operating Mode
Load and read register
Hold
Disable outputs
H = HIGH voltage level
h = HIGH voltage level one set-up time prior to the Low-to-High clock transition
L = LOW voltage level
l = LOW voltage level one set-up time prior to the Low-to-High clock transition
NC = No change
X = Don’t care
Z = High impedance “off” state
↑ = Low-to-High clock transition
↑ = Not a Low-to-High clock transition
FUNCTIONAL DESCRIPTION
The MC74F574 consists of eight edge-triggered flip-flops
with individual D-type inputs and 3-state true outputs. The
buffered clock and buffered Output Enable are common to all
flip-flops. The eight flip-flops will store the state of their individ-
ual D inputs that meet the setup and hold times requirements
on the LOW-to-HIGH Clock (CP) transition. With the Output
Enable (OE) LOW, the contents of the eight flip-flops are avail-
able at the outputs. When the OE is HIGH, the outputs go to
the high impedance state. Operation of the OE input does not
affect the state of the flip-flops.
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Symbol
Parameter
Limits
Min
Typ
Max
Unit
Test Conditions
(Note 1)
VIH
Input HIGH Voltage
2.0
—
—
V
Guaranteed Input HIGH Voltage
VIL
Input LOW Voltage
—
—
0.8
V
Guaranteed Input LOW Voltage
VIK
Input Clamp Diode Voltage
—
—
– 1.2
V
VCC = MIN, IIN = – 18 mA
VOH
Output HIGH Voltage
2.4
—
—
V
VCC = MIN
2.7
—
—
V
IOH = – 3.0 mA
VCC = 4.75 V
VOL
Output LOW Voltage
—
—
0.5
V
IOL = 24 mA
VCC = MIN
IIH
Input HIGH Current
—
—
20
VCC = MAX, VIN = 2.7 V
µA
—
—
100
VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
—
—
– 0.6
mA
VCC = MAX, VIN = 0.5 V
IOZH
Output Off Current — HIGH
—
—
50
µA
VCC = MAX, VOUT = 2.7 V
IOZL
Output Off Current — LOW
—
—
–50
µA
VCC = MAX, VOUT = 0.5 V
IOS
Output Short Circuit Current (Note 2)
– 60
—
–150
mA
VCC = MAX, VOUT = 0 V
ICCZ
Power Supply Current
(All Outputs OFF)
—
55
86
mA
VCC = MAX
Dn – GND;
OE = 4.5 V
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type.
2. Not more than one output should be shorted at a time, nor for more than 1 second.
FAST AND LS TTL DATA
4-227
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