參數(shù)資料
型號: MC74F779N
廠商: MOTOROLA INC
元件分類: 通用總線功能
英文描述: 8-BIT BIDIRECTIONAL BINARY COUNTER (3-STATE)
中文描述: F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 8-BIT BIDIRECTIONAL BINARY COUNTER, PDIP16
封裝: 648-08
文件頁數(shù): 2/4頁
文件大?。?/td> 105K
代理商: MC74F779N
4-253
FAST AND LS TTL DATA
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)
Symbol
Parameter
74F
(Note 1)
Min
Typ
(Note 2)
Max
Unit
Test Conditions
VOH
Output HIGH Voltage
TC
2.5
V
IOH= –1.0 mA
VIH = MIN
VCC= 4.5 V
2.7
3.4
VIL = MAX
VCC= 4.75 V
I/On
2.4
3.3
V
IOH = –3.0 mA
VIH = MIN
VCC= 4.5 V
2.7
3.3
VIL= MAX
VCC= 4.75 V
VOL
Output LOW Voltage
TC
0.35
0.5
V
IOL = 20 mA
VCC = 4.5 V
VIH = MIN
I/On
IOL = 24 mA
VIL = MAX
VIK
Input Clamp Diode Voltage
–0.73
–1.2
V
VCC= 4.5 V, IIN= –18 mA
IIH
Input HIGH Current
I/On
others
1.0
mA
VCC = 5.5 V
VIN= 5.5 V
VIN= 7.0 V
100
μ
A
I/On
others
70
μ
A
VCC = 5.5 V, VIN = 2.7 V
20
IIL
Input LOW Current
Except
I/On
–0.6
mA
VCC = 5.5 V, VIN = 0.5 V
IOZH
OFF-State Current
High-Level Voltage Applied
I/On
70
μ
A
VCC = 5.5 V
VOUT = 2.7 V
IOZL
OFF-State Current
Low-Level Voltage Applied
–600
VOUT = 0.5 V
IOS
Output Short Circuit Current (Note 3)
–60
–80
–150
mA
VCC= MAX, VOUT= 0 V
ICC
Total Supply Current (total)
ICCH
ICCL
82
116
mA
VCC= MAX
91
128
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.
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