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| 型号： | SNJ54LVT8986HV |
| 厂商： | Texas Instruments, Inc. |
| 英文描述： | 3.3-V LINKING ADDRESSABLE SCAN PORTS MULTIDROP-ADDRESSABLE IEEE STD 1149.1 (JTAG) TAP TRANSCEIVERS |
| 中文描述： | 3.3 V的连接寻址扫描港口多点寻址IEEE标准1149.1（JTAG接口）技术咨询收发器 |
| 文件页数： | 46/51页 |
| 文件大小： | 880K |
| 代理商： | SNJ54LVT8986HV |
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SN54LVT8986, SN74LVT8986
3.3-V LINKING ADDRESSABLE SCAN PORTS
MULTIDROP-ADDRESSABLE IEEE STD 1149.1 (JTAG) TAP TRANSCEIVERS
SCBS759B
–
OCTOBER 2002
–
REVISED APRIL 2003
46
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 24) (continued)
SN74LVT8986
VCC = 3.3 V
±
0.3 V
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 2.7 V
UNIT
MIN
MAX
MIN
MAX
tpd
tpd
tpd
tpd
BYP5
–
BYP0
BYP5
–
BYP0
↓
PTCK
CON2
–
CON0
STMS2
–
STMS0
STCK2
–
STCK0
CON2
–
CON0
13.5
14.5
ns
16.5
18
ns
9.5
10.5
ns
PTCK
↓
PTCK
↓
15
17.5
ns
tpd
(linking shadow protocol
acknowledge)
PTCK
↓
(connect)
PTDO
12
14.5
ns
tpd
STMS2
–
STMS0
17
21
ns
tpd
tpd
tpd
PTCK
↓
STDO2
–
STDO0
STMS2
–
STMS0
STRST2
–
STRST0
CON2
–
CON0
STMS2
–
STMS0
PTDO, CTDO
13.5
16
ns
PTMS
13
14
ns
PTRST
11
12
ns
tPLH
PTRST
↓
19.5
21.5
ns
17.5
18.5
tpd
tpd
tpd
ten
tdis
ten
ten
tPZH
tdis
tdis
tdis
tdis
tdis
tdis
tdis
tdis
PTCK
↓
12
14.5
ns
PX
SY2
–
SY0
PY
8
9
ns
SX2
–
SX0
BYP5
–
BYP0
↓
BYP5
–
BYP0
↓
OE
↓
9
10
ns
PTDO, STDO2
–
STDO0
PY, SY2
–
SY0
STDO2
–
STDO0
SY2
–
SY0
PTDO, STDO2
–
STDO0
PTDO, STDO2
–
STDO0
PY, SY2
–
SY0
STDO2
–
STDO0
SY2
–
SY0
PTDO, STDO2
–
STDO0
PY, SY2
–
SY0
PTDO, STDO2
–
STDO0
PY, SY2
–
SY0
13
15
ns
16
18
ns
14
15
ns
OE
↓
14
15
ns
PTCK
↓
17
18
ns
BYP5
–
BYP0
↑
BYP5
–
BYP0
↑
OE
↑
11
12
ns
11
12
ns
10
11
ns
OE
↑
10
11
ns
PTCK
↓
15
17
ns
PTCK
↓
17
19
ns
PTRST
↓
18
20
ns
PTRST
↓
21.5
23.5
ns
The transitions at STMSx are possible only when a linking shadow protocol select is issued while STMSx is held (in the OFF status) at a level
that differs from that at PTMS. Such operation is not recommended because state synchronization of the primary TAP to secondary TAP cannot
be ensured.
In most applications, the node to which PTDO and STDO2-STDO0 are connected has a pullup resistor. In such cases, this parameter is not
significant.
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