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參數資料
| 型號： | MM74C928 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 通用總線功能 |
| 英文描述： | 4-Digit Counters with Multiplexed 7-Segment Output Drivers |
| 中文描述： | 4位計數器與復用7段輸出驅動器 |
| 文件頁數： | 3/8頁 |
| 文件大?。?/td> | 204K |
| 代理商： | MM74C928 |
AC Electrical Characteristics
*
T
A
e
25
§
C, C
L
e
50 pF, unless otherwise noted
Symbol
Parameter
Conditions
Min
Typ
Max
Units
f
MAX
Maximum Clock Frequency
V
CC
e
5V,
Square Wave Clock
T
j
e
25
§
C
T
j
e
100
§
C
2
4
3
MHz
MHz
1.5
t
r
, t
f
Maximum Clock Rise or Fall Time
V
CC
e
5V
15
m
s
t
WR
Reset Pulse Width
V
CC
e
5V
T
j
e
25
§
C
T
j
e
100
§
C
T
j
e
25
§
C
T
j
e
100
§
C
T
j
e
25
§
C
T
j
e
100
§
C
T
j
e
25
§
C
T
j
e
100
§
C
T
j
e
25
§
C
T
j
e
100
§
C
250
320
100
125
ns
ns
t
WLE
Latch Enable Pulse Width
V
CC
e
5V
250
320
100
125
ns
ns
t
SET(CK, LE)
Clock to Latch Enable Set-Up Time
V
CC
e
5V
2500
3200
1250
1600
ns
ns
t
LR
Latch Enable to Reset Wait Time
V
CC
e
5V
0
0
b
100
b
100
ns
ns
t
SET(R, LE)
Reset to Latch Enable Set-Up Time
V
CC
e
5V
320
400
160
200
ns
ns
f
MUX
Multiplexing Output Frequency
V
CC
e
5V
1000
Hz
C
IN
*
AC Parameters are guaranteed by DC correlated testing.
Input Capacitance
Any Input (Note 2)
5
pF
Functional Description
Reset
D Asynchronous, active high
Display Select
D High, displays output of counter
Low, displays output of latch
Latch Enable
D High, flow through condition
Low, latch condition
Clock
D Negative edge sensitive
Segment Output D Current sourcing with 40 mA
@
V
OUT
e
V
CC
b
1.6V (typ.) Also, sink capability
e
2 LTTL loads
Digit Output
D Current sourcing with 1 mA
@
V
OUT
e
1.75V. Also, sink capability
e
2 LTTL
loads
Carry-Out
D 2 LTTL loads. See carry-out waveforms.
Typical Performance Characteristics
vs Output Voltage
Typical Segment Current
vs Ambient Temperature
Maximum Power Dissipation
Resistor Value
Current vs Segment
Typical Average Segment
TL/F/5919–3
Note:
V
D
e
Voltage across digit driver
3
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MM74C928N | 功能描述:計數器 IC 4-Digit Counters RoHS:否 制造商:NXP Semiconductors 計數器類型:Binary Counters 邏輯系列:74LV 位數:10 計數法: 計數順序: 工作電源電壓:1 V to 5.5 V 工作溫度范圍:- 40 C to + 125 C 封裝 / 箱體:SOT-109 封裝:Reel |
| MM74C93 | 制造商:Panasonic Industrial Company 功能描述:I.C. |
| MM74C932 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Phase Comparator |
| MM74C932N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Phase Comparator |
| MM74C93J | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:4-Bit Decade, Binary Counter |
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