参数资料
| 型号： | X4165V8I-4.5A |
| 厂商： | Intersil |
| 文件页数： | 5/22页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR CPU 16K EE 8-TSSOP |
| 标准包装： | 200 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 复位： | 高有效 |
| 复位超时： | 最小为 100 ms |
| 电压 - 阀值： | 4.62V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 管件 |
X4163, X4165
PRINCIPLES OF OPERATION
Power On Reset
Application of power to the X4163, X4165 activates a
Power On Reset Circuit that pulls the RESET/RESET
pin active. This signal provides several benefits.
It prevents the system microprocessor from starting to
operate with insufficient voltage.
It prevents the processor from operating prior to stabilization
of the oscillator.
It allows time for an FPGA to download its configuration prior
to initialization of the circuit.
It prevents communication to the EEPROM, greatly reducing
the likelihood of data corruption on power up.
When V CC exceeds the device V TRIP threshold value for
200ms (nominal) the circuit releases RESET/RESET allowing
the system to begin operation.
LOW VOLTAGE MONITORING
During operation, the X4163, X4165 monitors the V CC level
and asserts RESET/RESET if supply voltage falls below a
preset minimum V TRIP . The RESET/RESET signal prevents
the microprocessor from operating in a power fail or
brownout condition. The RESET/RESET signal remains
active until the voltage drops below 1V. It also remains active
until V CC returns and exceeds V TRIP for 200ms.
WATCHDOG TIMER
The Watchdog Timer circuit monitors the microprocessor
activity by monitoring the SDA and SCL pins. The
microprocessor must periodically send a start bit followed by
a stop bit prior to the expiration of the watchdog time out
period to prevent a RESET/RESET signal. The start and
stop bits need to be separated by SCL toggling low then high
at least one time.
The state of two nonvolatile control bits in the Status
Register determine the watchdog timer period. The
microprocessor can change these watchdog bits, or they
may be “locked” by tying the WP pin HIGH.
EEPROM INADVERTENT WRITE PROTECTION
When RESET/RESET goes active as a result of a low
voltage condition or Watchdog Timer Time Out, any in-
progress communications are terminated. While
RESET/RESET is active, no new communications are
allowed and no nonvolatile write operation can start.
Nonvolatile writes in-progress when RESET/RESET
goes active are allowed to finish.
Additional protection mechanisms are provided with
memory Block Lock and the Write Protect (WP) pin.
These are discussed elsewhere in this document.
V CC THRESHOLD RESET PROCEDURE
The X4163, X4165 is shipped with a standard V CC
threshold (V TRIP ) voltage. This value will not change
over normal operating and storage conditions. How-
ever, in applications where the standard V TRIP is not
exactly right, or if higher precision is needed in the
V TRIP value, the X4163, X4165 threshold may be
adjusted. The procedure is described below, and uses
the application of a nonvolatile control signal.
Figure 1. Set V TRIP Level Sequence (V CC = desired V TRIP values 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
5
00h
01h
00h
FN8120.2
November 26, 2007
相关PDF资料 |
PDF描述 |
|---|---|
| X4285V8I-4.5A | IC SUPERVISOR CPU 128K EE 8TSSOP |
| X4325V8I-4.5A | IC SUPERVISOR CPU 32K EE 8-TSSOP |
| X45620V20I-2.7 | IC VOLT MON DUAL SW EEPR 20TSSOP |
| X4645V8I-4.5A | IC SUPERVISOR CPU 64K EE 8-TSSOP |
| X4C105V20I | IC SUPERVISOR NOVRAM/EE 20-TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| X41D255 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| X41K1 | 制造商:ABB Low Voltage Products and Systems 功能描述:CCT,1KVA,460V,SINGLE |
| X41K403 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Harris Corporation 功能描述: |
| X41K417 | 制造商:Harris Corporation 功能描述: |
| X42 | 制造商:MERCURY 制造商全称:MERCURY 功能描述:Surface Mount Crystals |
发布紧急采购，3分钟左右您将得到回复。