M40Z111 5V或3V的NVRAM
The M40Z111/W NVRAM supervisor is a self-contained device which converts a standard low-power SRAM into a non-volatile memory.
A precision voltage reference and comparator monitors the VCC input for an out-of-tolerance condition.
When an invalid VCC condition occurs, the conditioned chip enable (ECON) output is forced inactive to write-protect the stored data in the SRAM.
During a power failure, the SRAM is switched from the VCC pin to the lithium cell within the SNAPHAT? to provide the energy required for data retention. On a subsequent power-up, the SRAM remains write protected until a valid power condition returns.
The 28-pin, 330mil SOIC provides sockets with gold plated contacts at both ends for direct connection to a separate SNAPHAT housing containing the battery. The unique design allows the SNAPHAT battery package to be mounted on top of the SOIC package after the completion of the surface mount process.
Insertion of the SNAPHAT housing after reflow prevents potential battery damage due to the high temperatures required for device surface-mounting. The SNAPHAT housing is keyed to prevent reverse insertion.
M40Z111 订购型号
| Ordering Model | Package | Battery Switchover(VSO) | RST Threshold(VPFD) | Packing Type |
| typ | ||||
| V | ||||
| M40Z111MH6E | SO 28 BATTERY | Yes | 4.4 | Tube |
| M40Z111MH6F | SO 28 BATTERY | Yes | 4.4 | Tape And Reel |
M40Z111 技术特性:
- Convert low power SRAMs into NVRAMs
- Precision power monitoring and power switching circuitry
- Automatic write-protection when VCC is out-oftolerance
- Choice of supply voltages and
power-fail deselect voltages:
– M40Z111: VCC = 4.5 to 5.5V THS = VSS; 4.5 ≤ VPFD ≤ 4.75V THS = VOUT; 4.2 ≤ VPFD ≤ 4.5V
– M40Z111W: VCC = 3.0 to 3.6V THS = VSS; 2.8 ≤ VPFD ≤ 3.0V VCC = 2.7 to 3.3V THS = VOUT; 2.5 ≤ VPFD ≤ 2.7V - Less than 15ns chip enable access propagation delay (for 5.0v device)
- Packaging includes a 28-lead SOIC and SNAPHAT? top (to be ordered separately)
- SOIC package provides direct connection for a SNAPHAT top which contains the battery
- RoHS compliant
– Lead-free second level interconnect
M40Z111 技术支持与电子电路设计开发资源下载
- M40Z111 数据手册DataSheet下载.PDF
- 微处理器监控器选型指南
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