- 您現在的位置：買賣IC網 > PDF目錄69017 > M48T128V-85CS1 (STMICROELECTRONICS) 0 TIMER(S), REAL TIME CLOCK, PDSO44 PDF資料下載
參數資料
| 型號： | M48T128V-85CS1 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數據恢復及定時提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| 封裝： | PLASTIC, SO-44 |
| 文件頁數： | 7/30頁 |
| 文件大?。?/td> | 162K |
| 代理商： | M48T128V-85CS1 |
第1頁第2頁第3頁第4頁第5頁第6頁當前第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁
15/30
M48T129Y, M48T129V
Data Retention Mode
With valid VCC applied, the M48T129Y/V operates
as a conventional BYTEWIDE
static RAM.
Should the supply voltage decay, the RAM will au-
tomatically deselect, write protecting itself when
VCC falls between VPFD (max), VPFD (min) win-
dow. All outputs become high impedance and all
inputs are treated as “Don’t care.”
Note: A power failure during a WRITE cycle may
corrupt data at the current addressed location, but
does not jeopardize the rest of the RAM’s content.
At voltages below VPFD (min), the memory will be
in a write protected state, provided the VCC fall
time is not less than tF. The M48T129Y/V may re-
spond to transient noise spikes on VCC that cross
into the deselect window during the time the de-
vice is sampling VCC. Therefore, decoupling of the
power supply lines is recommended.
When VCC drops below VSO, the control circuit
switches power to the internal battery, preserving
data and powering the clock. The internal energy
source will maintain data in the M48T129Y/V for
an accumulated period of at least 10 years at room
temperature. As system power rises above VSO,
the battery is disconnected, and the power supply
is switched to external VCC. Deselect continues for
tREC after VCC reaches VPFD (max). For a further
more detailed review of lifetime calculations,
please see Application Note AN1012.
Figure 12. Power Down/Up Mode AC Waveforms
Table 9. Power Down/Up AC Characteristics
Note: 1. Valid for Ambient Operating Temperature: TA =0 to 70°C; VCC = 4.5 to 5.5V or 3.0 to 3.6V (except where noted).
2. VPFD (max) to VPFD (min) fall time of less than tF may result in deselection/write protection not occurring until 200ms after VCC pass-
es VPFD (min).
3. VPFD (min) to VSS fall time of less than tFB may cause corruption of RAM data.
Symbol
Parameter(1)
Min
Max
Unit
tF
(2)
VPFD (max) to VPFD (min) VCC Fall Time
300
s
tFB
(3)
VPFD (min) to VSS VCC Fall Time
M48T129Y
10
s
M48T129V
150
s
tR
VPFD (min) to VPFD (max) VCC Rise Time
0
s
tRB
VSS to VPFD (min) VCC Rise Time
1
s
tREC
VPFD (max) to RST High
40
200
ms
AI01805
VCC
INPUTS
OUTPUTS
DON’T CARE
HIGH-Z
tF
tFB
tR
tRB
VALID
RECOGNIZED
VPFD (max)
VPFD (min)
VSO
tREC
RST
相關PDF資料 |
PDF描述 |
|---|---|
| M48T129Y-70CS1 | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T129Y-70PM1 | 0 TIMER(S), REAL TIME CLOCK, PDIP32 |
| M48T212A-85MH6TR | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T212A-85MH1TR | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T212A-85MH6 | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| M48T128V-85PM1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V-5V 1 Mbit 128Kb x8 TIMEKEEPER SRAM |
| M48T128V-85PM1TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V-5V 1 Mbit 128Kb x8 TIMEKEEPER SRAM |
| M48T128VPM | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V-5V 1 Mbit 128Kb x8 TIMEKEEPER SRAM |
| M48T128Y | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V-5V 1 Mbit 128Kb x8 TIMEKEEPER SRAM |
| M48T128Y_10 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.3 V, 1 Mbit (128 Kb x 8) TIMEKEEPER?? SRAM |
發(fā)布緊急采購，3分鐘左右您將得到回復。