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SN74AS877NT 数据表(PDF) 6 Page - Texas Instruments

部件名 SN74AS877NT
功能描述  8-BIT UNIVERSAL TRANSCEIVER PORT CONTROLLERS
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

SN74AS877NT 数据表(HTML) 6 Page - Texas Instruments

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SN54AS877, SN74AS877
8BIT UNIVERSAL TRANCEIVER PORT CONTROLLERS
SDAS234 − D2661, DECEMBER 1982 − REVISED AUGUST 1985
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77001
6
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54AS877
SN74AS877
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP†
MAX
MIN
TYP†
MAX
UNIT
VIK
VCC = 4.5 V,
II = − 18 mA
− 1.2
− 1.2
V
A1-A8
VCC = 4.5 V,
IOH = − 12 mA
2
3.2
VOH B1-B8
VCC = 4.5 V,
IOH = − 15 mA
2
3.3
V
All outputs
VCC = 4.5 V to 5.5 V,
IOH = − 2 mA
VCC −2
VCC −2
All outputs
VCC = 4.5 V,
IOL = 32 mA
0.25
0.5
VOL except Q8
VCC = 4.5 V,
IOL = 48 mA
0.35
0.5
V
Q8
VCC = 4.5 V,
IOL = 20 mA
0.25
0.5
0.25
0.5
S0, S1, S2
VCC = 5.5 V,
VI = 7 V
0.3
0.3
II
CLK and SERIN
VCC = 5.5 V,
VI = 7 V
0.1
0.1
mA
A1-A8, B1-B8
VCC = 5.5 V,
VI = 5.5 V
0.2
0.2
S0, S1, S2
60
60
IIH
CLK and SERIN
VCC = 5.5 V,
VI = 2.7 V
20
20
µA
A1-A8, B1-B8‡
70
70
S0, S1, S2
−1
−1
IIL
CLK and SERIN
VCC = 5.5 V,
VI = 0.4 V
− 0.5
− 0.5
mA
A1-A8, B1-B8
− 0.75
− 0.75
IO§
Except Q8
VCC = 5.5 V,
VO = 2.25 V
−30
−112
−30
−112
mA
IO§
Q8
VCC = 5.5 V,
VO = 2.25 V
−20
−112
−20
−112
mA
ICC
VCC = 5.5 V
136
220
136
220
mA
† All typical values are at VCC = 5 V, TA = 25°C.
‡ For I/O ports, the parameters IIH and IIL include the output currents IOZH and IOZL, respectively.
§ 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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