參數(shù)資料
型號(hào)： SN74ABT18640DLR
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, INVERTED OUTPUT, PDSO56
封裝： GREEN, PLASTIC, SSOP-56
文件頁(yè)數(shù)： 18/32頁(yè)
文件大?。?/td> 638K
代理商： SN74ABT18640DLR
SN54ABT18640, SN74ABT18640
SCAN TEST DEVICES
WITH 18-BIT INVERTING BUS TRANSCEIVERS
SCBS267C – FEBRUARY 1994 – REVISED JULY 1996
25
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)
SN54ABT18640
SN74ABT18640
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
ns
tr
Rise time
VCC power up
1
s
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
SN54ABT18640
SN74ABT18640
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
SN54ABT18640
SN74ABT18640
UNIT
(INPUT)
(OUTPUT)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
fmax
TCK
↓
50
90
50
MHz
tPLH
TCK
↓
AorB
3
7.1
10.1
3
14
3
13.1
ns
tPHL
TCK
↓
A or B
3
7
10.1
2.8
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
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
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