MC74F779D Просмотр технического описания (PDF) - Motorola => Freescale
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MC74F779D Datasheet PDF : 4 Pages
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MC74F779
FUNCTION TABLE
S1
S0
CET
OE
CP
Operating Mode
X
X
X
H
X
I/Oa to I/Oh in Hi-Z
X
X
X
L
X
Flip-flop outputs appear on I/O lines
L
L
X
H
↑
Parallel load all flip-flops
(not LL)
H
X
↑
Hold (TC held High)
H
L
L
X
↑
Count up
L
H
L
X
↑
Count Down
H = High voltage level
L = Low voltage level
X = Don’t care
↑ = Low-to-High clock transition
(not LL) = S1 and S2 should never be Low voltage level at the same time in the hold mode only.
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
74F
Symbol
Parameter
Typ
Min (Note 2) Max Unit
Test Conditions
(Note 1)
VOH
Output HIGH Voltage
2.5
TC
2.7
3.4
2.4
3.3
I/On
2.7
3.3
IOH= –1.0 mA VCC = 4.5 V
V
VIL = MAX
VIH = MIN
VCC = 4.75 V
IOH = –3.0 mA VCC = 4.5 V
V
VIL= MAX
VIH = MIN
VCC = 4.75 V
VOL
Output LOW Voltage
TC
IOL = 20 mA
VCC = 4.5 V
0.35
0.5
V
VIL = MAX
I/On
IOL = 24 mA
VIH = MIN
VIK
Input Clamp Diode Voltage
IIH
Input HIGH Current
I/On
others
I/On
others
–0.73 –1.2
V
VCC = 4.5 V, IIN = –18 mA
1.0
mA
100
µA
VCC = 5.5 V
VIN = 5.5 V
VIN = 7.0 V
70
µA VCC = 5.5 V, VIN = 2.7 V
20
IIL
IOZH
IOZL
Input LOW Current
OFF-State Current
High-Level Voltage Applied
OFF-State Current
Low-Level Voltage Applied
Except
I/On
I/On
–0.6 mA VCC = 5.5 V, VIN = 0.5 V
70
µA VCC = 5.5 V
–600
VOUT = 2.7 V
VOUT = 0.5 V
IOS
Output Short Circuit Current (Note 3)
–60
–80
–150 mA VCC = MAX, VOUT = 0 V
ICCH
82
116
ICC
Total Supply Current (total)
ICCL
91
128
mA VCC = MAX
ICCZ
97
136
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under guaranteed operating conditions for the applicable device type.
2. All typical values are at VCC = 5.0 V, TA = 25°C.
3. Not more than one output should be shorted at a time.
FAST AND LS TTL DATA
4-253
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