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參數(shù)資料
| 型號(hào)： | M48T35-70PC6 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDIP28 |
| 封裝： | 0.600 INCH, CAPHAT, PLASTIC, DIP-28 |
| 文件頁(yè)數(shù)： | 12/18頁(yè) |
| 文件大?。?/td> | 140K |
| 代理商： | M48T35-70PC6 |
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M48T35, M48T35Y
nection to a separate SNAPHAT housing contain-
ing the battery and crystal. 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. Inser-
tion of the SNAPHAT housing after reflow pre-
vents potential battery and crystal damage due to
the high temperatures required for device surface-
mounting. The SNAPHAT housing is keyed to pre-
vent reverse insertion. The SOIC and battery/crys-
tal packages are shipped separately in plastic anti-
static tubes or in Tape & Reel form.
For the 28 lead SOIC, the battery/crystal package
(i.e.
SNAPHAT)
part
number
is
"M4T28-
BR12SH1".
As Figure 3 shows, the static memory array and
the quartz controlled clock oscillator of the
M48T35/35Y are integrated on one silicon chip.
The two circuits are interconnected at the upper
eight memory locations to provide user accessible
BYTEWIDE clock information in the bytes with ad-
dresses 7FF8h-7FFFh.
Table 2. Operating Modes (1)
Note: 1. X = VIH or VIL; VSO = Battery Back-up Switchover Voltage.
2. See Table 6 for details.
Mode
VCC
E
G
W
DQ0-DQ7
Power
Deselect
4.75V to 5.5V
or
4.5V to 5.5V
VIH
X
High Z
Standby
Write
VIL
X
VIL
DIN
Active
Read
VIL
VIH
DOUT
Active
Read
VIL
VIH
High Z
Active
Deselect
VSO to VPFD (min)
(2)
X
High Z
CMOS Standby
Deselect
≤ VSO
X
High Z
Battery Back-up Mode
Figure 3. Block Diagram
AI01623
LITHIUM
CELL
OSCILLATOR AND
CLOCK CHAIN
VPFD
VCC
VSS
32,768 Hz
CRYSTAL
VOLTAGE SENSE
AND
SWITCHING
CIRCUITRY
8 x 8 BiPORT
SRAM ARRAY
32,760 x 8
SRAM ARRAY
A0-A14
DQ0-DQ7
E
W
G
POWER
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| M48T35AV-10MH1F | 0 TIMER(S), REAL TIME CLOCK, PDSO28 |
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| M48T35AY-70MH6TR | 0 TIMER(S), REAL TIME CLOCK, PDSO28 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M48T35-70PC6E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V, 256 Kbit (32 Kb x 8) TIMEKEEPER SRAM |
| M48T35-70PC6F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V, 256 Kbit (32 Kb x 8) TIMEKEEPER SRAM |
| M48T35-70PC6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x8 TIMEKEEPER SRAM |
| M48T35-70PM1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V, 256 Kbit (32 Kb x 8) TIMEKEEPER SRAM |
| M48T35-70PM1E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V, 256 Kbit (32 Kb x 8) TIMEKEEPER SRAM |
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