M41ST87W datasheet(20/42 Pages) STMICROELECTRONICS

部件名	M41ST87W

功能描述	5.0, 3.3, or 3.0V, 1280 bit (160 x8) Secure Serial RTC and NVRAM Supervisor with Tamper Detection

PDF	42 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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20 / 42 page

M41ST87Y, M41ST87W

20/42

Figure 19. Tamper Output Timing (with CLR1EXT or CLR2EXT = '1')

Note: 1. If connected to a negative charge pump device, this pin must be isolated from the charge pump by using both n-channel and p-

channel MOSFETs as illustrated in Figure 20., page 21.

2. If the device is in battery back-up; NOT on VCC (see RAM Clear External (CLR1EXT and CLR2EXT), page 18).

3. If TIEX = '1.'

4. If ABE = '1.'

Table 5. Tamper Detect Timing

Note: 1. With input capacitance = 70pF and resistance = 50

Ω.

2. If the OF Bit is set, tCLRD(min) = 0.5ms.

Symbol

Parameter

CLRPW1

CLRPW0

Min

Typ

Max

Unit

tCLRD

(1)

Tamper RAM Clear Ext Delay

1.0(2)

1.5

2.0

tCLR

Tamper Clear Timing

TPCLR

VOUT

(1)

RST

Tamper

Event

(TB Bit set)

High-Z(2)

trec

tCLR

tCLRD

AI07083

ECON

IRQ/OUT

(3)

High-Z

(4)

M41ST87W 数据表(PDF) 20 Page - STMicroelectronics

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