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参数资料
型号： SN54LS245FK
厂商： TEXAS INSTRUMENTS INC
元件分类： 总线收发器
英文描述： LS SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, CQCC20
封装： CERAMIC, LCC-20
文件页数： 13/18页
文件大小： 714K
代理商： SN54LS245FK
SN54LS245, SN74LS245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDLS146A – OCTOBER 1976 – REVISED FEBRUARY 2002
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54LS245
SN74LS245
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
VIH
High-level input voltage
2
V
VIL
Low-level input voltage
0.7
0.8
V
VIK
Input clamp voltage
VCC = MIN,
II = –18 mA
–1.5
V
Hysteresis (VT+ – VT–)
A or B
VCC = MIN
0.2
0.4
0.2
0.4
V
VOH
High level output voltage
VCC = MIN,
VIH 2V
IOH = –3 mA
2.4
3.4
2.4
3.4
V
VOH
High-level output voltage
VIH = 2 V,
VIL = VIL(max)
IOH = MAX
2
V
VOL
Low level output voltage
VCC = MIN,
VIH 2V
IOL = 12 mA
0.4
V
VOL
Low-level output voltage
VIH = 2 V,
VIL = VIL(max)
IOL = 24 mA
0.5
V
IOZH
Off-state output current,
high-level voltage applied
VCC = MAX,
OE at 2 V
VO = 2.7 V
20
A
IOZL
Off-state output current,
low-level voltage applied
VCC = MAX,
OE at 2 V
VO = 0.4 V
–200
A
II
Input current at
maximum input
A or B
VCC = MAX
VI = 5.5 V
0.1
mA
II
maximum input
voltage
DIR or OE
VCC = MAX
VI = 7 V
0.1
mA
IIH
High-level input current
VCC = MAX,
VIH = 2.7 V
20
A
IIL
Low-level input current
VCC = MAX,
VIL = 0.4 V
–0.2
mA
IOS
Short-circuit output current§
VCC = MAX
–40
–225
40
–225
mA
Total, outputs high
48
70
48
70
ICC
Supply current
Total, outputs low
VCC = MAX
Outputs open
62
90
62
90
mA
Outputs at high Z
64
95
64
95
For conditions shown as MIN or MAX, use the appropriate values specified under recommended operating conditions.
All typical values are at VCC = 5 V, TA = 25°C.
§ Not more than one output should be shorted at a time, and duration of the short circuit should not exceed one second.
switching characteristics, VCC = 5 V, TA = 25°C (see Figure 1)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
tPLH
Propagation delay time, low- to high-level output
C45 pF
R
667
W
8
12
ns
tPHL
Propagation delay time high to low level output
CL = 45 pF,
RL = 667 W
8
12
ns
tPHL
Propagation delay time, high- to low-level output
8
12
tPZL
Output enable time to low level
CL =45 pF
RL = 667 W
27
40
ns
tPZH
Output enable time to high level
CL = 45 pF,
RL = 667 W
25
40
ns
tPLZ
Output disable time from low level
CL =5 pF
RL = 667 W
15
25
ns
tPHZ
Output disable time from high level
CL = 5 pF,
RL = 667 W
15
28
ns
相关PDF资料
PDF描述
SN74LS247NSRE4 LS SERIES, SEVEN SEGMENT DECODER/DRIVER, INVERTED OUTPUT, PDSO16
SN74LS247NSRG4 LS SERIES, SEVEN SEGMENT DECODER/DRIVER, INVERTED OUTPUT, PDSO16
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SNJ54LS251FK LS SERIES, 8 LINE TO 1 LINE MULTIPLEXER, COMPLEMENTARY OUTPUT, CQCC20
SN74LS251N LS SERIES, 8 LINE TO 1 LINE MULTIPLEXER, COMPLEMENTARY OUTPUT, PDIP16
相关代理商/技术参数
参数描述
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