参数资料
| 型号： | X4643S8-2.7A |
| 厂商： | Intersil |
| 文件页数： | 4/21页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR CPU 64K EE 8-SOIC |
| 标准包装： | 200 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 最小为 100 ms |
| 电压 - 阀值： | 2.92V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 管件 |
X4643, X4645
Setting the V TRIP Voltage
This procedure is used to set the V TRIP to a higher or
lower voltage value. It is necessary to reset the trip
point before setting the new value.
To set the new V TRIP voltage, start by setting the WEL
bit in the control register, then apply the desired V TRIP
threshold voltage to the V CC pin and the programming
voltage, V P , to the WP pin and 2 byte address and 1
byte of “00” data. The stop bit following a valid write
operation initiates the V TRIP programming sequence.
Bring WP LOW to complete the operation.
Resetting the V TRIP Voltage
This procedure is used to set the V TRIP to a “native”
voltage level. For example, if the current V TRIP is 4.4V
and the new V TRIP must be 4.0V, then the V TRIP must
be reset. When V TRIP is reset, the new V TRIP is some-
thing less than 1.7V. This procedure must be used to
set the voltage to a lower value.
To reset the new V TRIP voltage start by setting the
WEL bit in the control register, apply V CC and the pro-
gramming voltage, V P , to the WP pin and 2 byte
address and 1 byte of “00” data. The stop bit of a valid
write operation initiates the V TRIP programming
sequence. Bring WP LOW to complete the operation.
Figure 2. Reset V TRIP Level Sequence (V CC > 3V. WP = 12-15V, WEL bit set)
WP
V P = 12-15V
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
SCL
SDA
A0h
00h
03h
00h
Figure 3. Sample V TRIP Reset Circuit
V P
V TRIP
RESET
4.7K
1
2
3
SOIC
X4643
8
7
6
Adjust
Run
μC
Adj.
4
5
SCL
SDA
4
FN8123.0
March 29, 2005
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