參數(shù)資料
型號: W89C880F
英文描述: LAN Hub Controller
中文描述: 局域網(wǎng)集線器控制器
文件頁數(shù): 70/72頁
文件大?。?/td> 731K
代理商: W89C880F
W89C840F
- 70 -
Write Cycle Timing (Byte mode)
Symbol
Parameters
MIN,
MAX.
Unit
TDS
Data valid to BtCSB deasserted
55
-
ns
TDH
Data hold from BtCSB deasserted
10
-
ns
TWC
Write Cycle Time
130
-
ns
TWS
Address valid to BtCSB asserted
0
-
ns
TWP
BtCSB asserted width
95
-
ns
TWPH
BtCSB keep high from BtCSB deasserted
155
-
ns
TDLES
Data valid to LE enable
10
-
ns
TDLEH
LE enable high time
20
-
ns
Test Load
AC Timing Test Conditions
PARAMETER
TEST CONDITION
Supply voltage (VDD/VSS)
5V
±
5%
25
°
C/70
°
C
GND to 4.0V
Temperature
Input Test Pattern Levels (TTL/CMOS)
Input Rise and Fall Times (TTL/CMOS)
5nS
Input and Output Pattern Reference Level (TTL/CMOS)
1.5V
Tristate Reference Levels
Float (V) + 0.5V
Output Load
SW1 (Note 2)
Vcc
0.1uF
Input
DEVICE
UNDER
TEST
RL = 2.2K
Output
CL (Note 1)
Note 1: Load capacitance employed on output is 50 pF.
Note 2:
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