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SN74BCT979 Folha de dados(PDF) 6 Page - Texas Instruments

Nome de Peças SN74BCT979
Descrição Electrónicos  9-BIT REGISTERED BTL TRANSCEIVER WITH PARITY GENERATOR/CHECKER
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Fabricante Electrônico  TI1 [Texas Instruments]
Página de início  http://www.ti.com
Logo TI1 - Texas Instruments

SN74BCT979 Folha de dados(HTML) 6 Page - Texas Instruments

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SN74BCT979
9BIT REGISTERED BTL TRANSCEIVER
WITH PARITY GENERATOR/CHECKER
SCBS115A − OCTOBER 1990 − REVISED NOVEMBER 1993
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP†
MAX
UNIT
VIK
LE, OE, SEL, ODD/EVEN, AI1 − AI8, APARI
VCC = 4.5 V,
II = −18 mA
−1.2
V
IOH
B1 − B8, BPAR
VCC = 5.5 V,
VOH = 2.1 mA
100
µA
VOH
AO1 − AO8, APARO, ERRA, ERRB
VCC = 4.5 V
IOH = −1 mA
2.5
3.4
V
VOH
AO1 − AO8, APARO, ERRA, ERRB
VCC = 4.5 V
IOH = − 3 mA
2.4
3.3
V
IOL = 24 mA
0.35
0.5
VOL
AO1 − AO8, APARO, ERRA, ERRB
VCC = 4.5 V
IOL = 80 mA
0.75
1.1
V
VOL
AO1 − AO8, APARO, ERRA, ERRB
VCC = 4.5 V
IOL = 100 mA
0.75
1.15
V
II
LE, OE, SEL, ODD/EVEN, AI1 − AI8, APARI
VCC = 5.5 V,
VI = 5.5 V
100
µA
IIH
LE, OE, SEL, ODD/EVEN, AI1 − AI8, APARI
VCC = 5.5 V
VI = 2.7 V
20
A
IIH
B1 − B8, BPAR‡
VCC = 5.5 V
VI = 2.1 V
100
µA
IIL
LE, OE, SEL, ODD/EVEN, AI1 − AI8, APARI
VCC = 5.5 V
VI = 0.5 V
−20
A
IIL
B1 − B8, BPAR‡
VCC = 5.5 V
VI = 0.3 V
−100
µA
IOZH
AO1 − AO8, APARO
VCC = 5.5 V,
VO = 2.7 V
50
µA
IOZL
AO1 − AO8, APARO
VCC = 5.5 V,
VO = 0.5 V
−50
µA
IOS§
AO1 − AO8, APARO
VCC = 5.5 V,
VO = 0
−60
− 200
mA
Outputs high
17
36
ICC
Outputs low
VCC = 5.5 V,
Outputs open
69
85
mA
Outputs disabled
21
42
Ci
LE, OE, SEL, ODD/EVEN
VCC = 5 V,
VI = 2.5 V or 0.5 V
8
pF
Ci
AI1 − AI8, APARI
VCC = 5 V,
VI = 2.5 V or 0.5 V
8
pF
Cio
B1 − B8, BPAR
VCC = 5 V,
VO = 2.5 V or 0.5 V
5
pF
Co
AO1 − AO8, APARO
VCC = 5 V,
VO = 2.5 V or 0.5 V
6.5
pF
TT
Output transition time
B port¶
1
ns
† All typical values are at VCC = 5 V, TA = 25°C.
‡ For I/O ports, the parameters IIH and IIL include the off-state output current.
§ Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
¶ Measured from 1.3 V to 1.8 V (see Figure 1).
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
VCC = 5 V,
TA = 25°C
MIN
MAX
UNIT
MIN
MAX
MIN
MAX
UNIT
tw
Pulse duration
LEAB high
5
5
ns
tw
Pulse duration
LEBA high
4
4
ns
AI1 − AI8, APARI before LEAB
Data high
4
4
tsu
Setup time
AI1 − AI8, APARI before LEAB
Data low
3
3
ns
tsu
Setup time
B1 − B8, BPAR before LEBA
Data high
8.5
8.5
ns
B1 − B8, BPAR before LEBA
Data low
7
7
AI1 − AI8, APARI after LEAB
Data high
1
1
th
Hold time
AI1 − AI8, APARI after LEAB
Data low
2.5
2.5
ns
th
Hold time
B1 − B8, BPAR after LEBA
Data high
0.5
0.5
ns
B1 − B8, BPAR after LEBA
Data low
0.5
0.5


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