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參數(shù)資料
| 型號： | SN74ABT18245ADGG |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | ABT SERIES, DUAL 9-BIT BOUNDARY SCAN TRANSCEIVER, TRUE OUTPUT, PDSO56 |
| 封裝： | PLASTIC, TSSOP-56 |
| 文件頁數(shù)： | 19/31頁 |
| 文件大小： | 438K |
| 代理商： | SN74ABT18245ADGG |
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SN54ABT18245A, SN74ABT18245A
SCAN TEST DEVICES
WITH 18-BIT BUS TRANSCEIVERS
SCBS110H – AUGUST 1992 – REVISED FEBRUARY 1999
26
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (test mode) (see Figure 14)
SN54ABT18245A
SN74ABT18245A
UNIT
MIN
MAX
MIN
MAX
UNIT
fclock
Clock frequency
TCK
0
50
0
50
MHz
tw
Pulse duration
TCK high or low
8.1
ns
A, B, DIR, or OE before TCK
↑
9.5
7
tsu
Setup time
TDI before TCK
↑
4.5
ns
TMS before TCK
↑
3.6
A, B, DIR, or OE after TCK
↑
0.7
0
th
Hold time
TDI after TCK
↑
0
ns
TMS after TCK
↑
0.5
td
Delay time
Power up to TCK
↑
50*
50
ns
tr
Rise time
VCC power up
1*
1
s
* On products compliant to MIL-PRF-38535, these parameters are not production tested.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (normal mode) (see Figure 14)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
TA = 25°C
SN54ABT18245A
SN74ABT18245A
UNIT
(INPUT)
(OUTPUT)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
tPLH
AorB
BorA
1.5
2.8
4.1
1.5
5.1
1.5
4.8
ns
tPHL
A or B
B or A
1.5
3.1
4.6
1.5
5.8
1.5
5.4
ns
tPZH
OE
BorA
2
4.7
5.8
2
8.1
2
7.5
ns
tPZL
OE
B or A
2
4.5
6.2
2
8.5
2
8
ns
tPHZ
OE
BorA
2.5
5.8
6.8
2.5
9.5
2.5
8.5
ns
tPLZ
OE
B or A
2.5
4.8
6
2.5
8.5
2.5
7.5
ns
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (test mode) (see Figure 14)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
TA = 25°C
SN54ABT18245A
SN74ABT18245A
UNIT
(INPUT)
(OUTPUT)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
fmax
TCK
↓
50
90
50
MHz
tPLH
TCK
↓
AorB
3
7.1
10.1
2.8
14
3
13.1
ns
tPHL
TCK
↓
A or B
3
7
10.1
3
13.8
3
12.8
ns
tPLH
TCK
↓
TDO
2
3.4
5
2
6.4
2
6.1
ns
tPHL
TCK
↓
TDO
2
3.9
5.6
2
7
2
6.5
ns
tPZH
TCK
↓
AorB
4
7.5
10.6
4
14.1
4
13.4
ns
tPZL
TCK
↓
A or B
4
7.6
10.5
4
14.3
4
13.6
ns
tPZH
TCK
↓
TDO
2
3.8
5.5
2
7
2
6.6
ns
tPZL
TCK
↓
TDO
2.5
4
5.7
2.3
7.3
2.5
6.9
ns
tPHZ
TCK
↓
AorB
3.5
7.7
10.8
2.9
14.4
3.5
13.6
ns
tPLZ
TCK
↓
A or B
2.5
7.1
10.1
2.5
13.8
2.5
12.7
ns
tPHZ
TCK
↓
TDO
2
3.9
5.7
2
7.5
2
7.2
ns
tPLZ
TCK
↓
TDO
1.5
3.5
5.4
1.5
6.7
1.5
6.3
ns
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