参数资料
型号: SN74LVTH18245
厂商: Texas Instruments, Inc.
英文描述: 3.3-V ABT Scan Test Device With 18-Bit Universal Bus Transceivers(3.3V ABT 扫描检测装置带18位总线收发器)
中文描述: 的3.3V ABT生根粉扫描测试设备与18位通用总线收发器(3.3V的ABT生根粉扫描检测装置带18位总线收发器)
文件页数: 27/34页
文件大小: 706K
代理商: SN74LVTH18245
SN54LVTH18245, SN54LVTH182245, SN74LVTH18245, SN74LVTH182245
3.3-V ABT SCAN TEST DEVICES
WITH 18-BIT BUS TRANSCEIVERS
SCBS161C – AUGUST 1993 – REVISED JULY 1996
27
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
timing requirements over recommended operating free-air temperature range (unless otherwise
noted) (test mode) (see Note 4 and Figure 14)
12
SN54LVTH18245
VCC = 3.3 V
±
0.3 V
SN74LVTH18245
VCC = 3.3 V
±
0.3 V
UNIT
VCC = 2.7 V
VCC = 2.7 V
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
fclock
tw
Clock frequency
TCK
0
50
MHz
Pulse duration
TCK high or low
A, B, DIR, or OE before TCK
TDI before TCK
TMS before TCK
A, B, DIR, or OE after TCK
TDI after TCK
TMS after TCK
Power up to TCK
VCC power up
9.5
ns
Setup time
6.5
tsu
2.5
ns
2.5
H ld i
Hold time
1.5
th
1.5
ns
1.5
td
tr
Delay time
50
ns
μ
s
Rise time
1
NOTE 4: Product preview specifications are design goals only and are subject to change without notice.
P
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