參數(shù)資料
型號(hào)： SNJ54AS869FK
廠商： TEXAS INSTRUMENTS INC
元件分類： 計(jì)數(shù)器
英文描述： AS SERIES, SYN POSITIVE EDGE TRIGGERED 8-BIT BIDIRECTIONAL BINARY COUNTER, CQCC28
封裝： CERAMIC, CC-24
文件頁(yè)數(shù)： 23/24頁(yè)
文件大小： 508K
代理商： SNJ54AS869FK
SN54AS867, SN54AS869
SN74ALS867A, SN74ALS869, SN74AS867, SN74AS869
SYNCHRONOUS 8-BIT UP/DOWN COUNTERS
SDAS115C – DECEMBER 1982 – REVISED JANUARY 1995
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI
7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA: SN74ALS867A
0
°C to 70°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range
– 65
°C to 150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
SN74ALS867A
UNIT
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
V
VIH
High-level input voltage
2
V
VIL
Low-level input voltage
0.8
V
IOH
High-level output current
– 0.4
mA
IOL
Low-level output current
8
mA
fclock
Clock frequency
0
35
MHz
tw(clock)
Pulse duration, CLK high or low
14
ns
tw(clear)
Pulse duration of clear pulse, S0 and S1 low
10
ns
Data inputs A – H
10
ENP or ENT
15
tsu
Setup time before CLK
↑
S0 low and S1 high (load)
12
ns
S0 high and S1 low (count down)
12
S0 and S1 high (count up)
12
th
Hold time after CLK
↑
S0 high after S1
↑ or S1 high after S0↑
3
ns
th
Hold time after CLK
↑
Data inputs A – H
0
ns
TA
Operating free-air temperature
0
70
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN74ALS867A
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIK
VCC = 4.5 V,
II = –18 mA
–1.2
V
VOH
VCC = 4.5 V to 5.5 V,
IOH = – 0.4 mA
VCC –2
V
VOL
VCC =4 5V
IOL = 4 mA
0.25
0.4
V
VOL
VCC = 4.5 V
IOL = 8 mA
0.35
0.5
V
II
VCC = 5.5 V,
VI = 7 V
0.1
mA
IIH
VCC = 5.5 V,
VI = 2.7 V
20
A
IIL
VCC = 5.5 V,
VI = 0.4 V
– 0.2
mA
IO§
VCC = 5.5 V,
VO = 2.25 V
–30
–112
mA
ICC
VCC = 5.5 V
28
45
mA
All typical values are at VCC = 5 V, TA = 25°C.
§ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
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