參數資料
型號: SDA5250
廠商: SIEMENS A G
元件分類: 圖文
英文描述: ICs for Consumer Electronics
中文描述: TELETEXT AND VPS/PDC DECODER, PQCC84
文件頁數: 135/143頁
文件大?。?/td> 1050K
代理商: SDA5250
SDA 525x
Semiconductor Group
135
1998-04-08
AC-Testing Input, Output, Float Waveforms
AC testing inputs are driven at
V
DD
– 0.5 V for a logic ‘1’ and at 0.45 V for a logic ‘0’.
Timing measurements are made at
V
IHmin
for a logic ‘1’ and at
V
IHmax
for a logic ‘0’. For
timing purposes a port pin is no longer floating, when a 100 mV change from load voltage
occurs.
Figure 43
I/O-Waveform for AC-Tests
Test Points
Timing Reference
Points
UED04592
0.5 V
DD
V
-
V
0.45
-
V
OH
V
0.1
0.9
DD
V
+
0.1 V
LOAD
V
+
V
LOAD
0.2
0.2
-
V
DD
0.1
0.1 V
OL
V
+
-
V
LOAD
V
0.1
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