参数资料
| 型号： | X45620V20I-2.7 |
| 厂商： | Intersil |
| 文件页数： | 2/20页 |
| 文件大小： | 0K |
| 描述： | IC VOLT MON DUAL SW EEPR 20TSSOP |
| 标准包装： | 75 |
| 类型： | 多压监控器 |
| 监视电压数目： | 2 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 最小为 75 ms |
| 电压 - 阀值： | 1.75V，2.62V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 管件 |
X45620
DESCRIPTION (Continued)
The Watchdog Timer provides an independent protec-
tion mechanism for microcontrollers. When the micro-
PIN CONFIGURATION
20-Pin TSSOP
controller fails to restart a timer within a selectable
time out interval, the device activates the WDO signal.
The user selects the interval from three preset values.
Once selected, the interval does not change, even
after cycling the power.
The device’s low V CC detection circuitry protects the
user’s system from low voltage conditions, resetting
the system when V CC (V1MON) falls below the mini-
mum V CC trip point (V TRIP1 ). RESET is asserted until
V CC returns to proper operating level and stabilizes. A
second voltage monitor circuit tracks the unregulated
supply or monitors a second power supply voltage to
provide a power fail warning. Intersil’s unique circuits
S0
S1
NC
LOWLINE
NC
V2FAIL
V2MON
RESET/MR
WDO
V SS
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V CC (V1MON)
WP
NC
BATT-ON
V OUT
V BATT
SCL
NC
NC
SDA
allow the threshold for either voltage monitor to be
reprogrammed to meet special needs or to fine-tune
the threshold for applications requiring higher preci-
sion. (Contact factory for custom V TRIP options)
Ordering Information
Operating
V CC Range
4.75–5.5V
V TRIP1 Range
4.5–4.75V
V TRIP2 Range
2.55–2.7V
Package
20L TSSOP
Temperature Range
0°C–70°C
Part Number
X45620V20
-40°C–85°C
X45620V20I
2.7–5.5V
2.55–2.7V
1.7–1.80V
20L TSSOP
0°C–70°C
X45620V20-2.7
PIN DESCRIPTION
-40°C–85°C
X45620V20I-2.7
Pin
1
2
3
4
5
6
7
Name
S 0
S 1
NC
LOWLINE
NC
V2FAIL
V2MON
Function
Device Select Input. This pin has an internal pull down resistor. (>10M ? typical)
Device Select Input. This pin has an internal pull down resistor. (>10M ? typical)
No internal connections
Low V CC Detect . This open drain output signal goes LOW when V CC < V TRIP1 and immediately
goes HIGH when V CC > V TRIP1 .
No internal connections
V2 Voltage Fail Output. This open drain output goes LOW when V2MON is less than V TRIP2 and
goes HIGH when V2MON exceeds V TRIP2 . There is no power-up reset delay circuitry on this pin.
V2 Voltage Monitor Input. When the V2MON input is less than the V TRIP2 voltage, V2FAIL goes
LOW. This input can monitor an unregulated power supply with an external resistor divider or can
monitor a second power supply with no external components. Connect V2MON to V SS or V CC
when not used.
2
FN8250.0
July 29, 2005
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