參數(shù)資料
型號(hào)： 74ALS688
廠商： Texas Instruments, Inc.
英文描述： 8-BIT IDENTITY COMPARATORS
中文描述： 8位身分比較器
文件頁(yè)數(shù)： 4/14頁(yè)
文件大?。?/td> 493K
代理商： 74ALS688
SN54ALS688, SN74ALS688
8-BIT IDENTITY COMPARATORS
SDAS228A – JUNE 1982 – REVISED JANUARY 1995
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions
SN54ALS688
MIN
NOM
SN74ALS688
MIN
NOM
UNIT
MAX
MAX
VCC
VIH
VIL
IOH
IOL
TA
Supply voltage
4.5
5
5.5
4.5
5
5.5
V
High-level input voltage
2
2
V
Low-level input voltage
0.7
0.8
V
High-level output current
–1
–2.6
mA
Low-level output current
12
24
mA
°
C
Operating free-air temperature
–55
125
0
70
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ALS688
MIN
TYP
SN74ALS688
MIN
TYP
UNIT
MAX
MAX
VIK
VCC = 4.5 V,
VCC = 4.5 V to 5.5 V,
II = –18 mA
IOH = – 0.4 mA
IOH = – 1 mA
IOH = – 2.6 mA
IOL = 12 mA
IOL = 24 mA
VI = 7 V
VI = 2.7 V
VI = 0.4 V
VO = 2.25 V
See Note 1
–1.5
–1.5
V
VCC –2
2.4
VCC –2
VOH
VCC= 4 5 V
VCC = 4.5 V
3.3
V
2.4
3.3
VOL
VCC= 4 5 V
VCC = 4.5 V
0.25
0.4
0.25
0.4
V
0.35
0.5
II
IIH
IIL
IO
ICC
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
VCC = 5.5 V,
0.1
0.1
mA
20
20
μ
A
–0.1
–0.1
mA
–20
–112
–30
–112
mA
12
19
12
19
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.
NOTE 1: ICC is measured with G grounded, P and Q at 4.5 V.
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500
,
TA = MIN to MAX§
SN54ALS688
MIN
MAX
3
16
UNIT
SN74ALS688
MIN
3
MAX
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
P
P = Q
12
ns
5
25
5
20
Q
P = Q
3
16
3
12
ns
5
25
5
20
G
P = Q
3
5
15
25
3
5
12
22
ns
§For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
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