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参数资料
| 型号： | M48T212Y-70MH6TR |
| 厂商： | 意法半导体 |
| 英文描述： | Shielded Multiconductor Cable; Number of Conductors:5; Conductor Size AWG:24; No. Strands x Strand Size:7 x 32; Jacket Material:Polyvinylchloride (PVC); Leaded Process Compatible:Yes; Conductor Material:Copper; Temperature Max:80 C RoHS Compliant: Yes |
| 中文描述： | 5V/3.3V计时[控制器 |
| 文件页数： | 18/23页 |
| 文件大小： | 150K |
| 代理商： | M48T212Y-70MH6TR |
M48T212Y, M48T212V
18/23
INITIAL POWER-ON DEFAULTS
Upon application of power to the device, the fol-
lowing register bits are set to a ‘0’ state: WDS,
BMB0-BMB4, RB0-RB1, AFE, ABE, W and FT.
(See Table 16)
POWER SUPPLY DECOUPLING
AND UNDERSHOOT PROTECTION
Note: I
CC
transients, including those produced by
output switching, can produce voltage fluctua-
tions, resulting in spikes on the V
CC
bus. These
transients canbe reduced if capacitors are used to
store energy, which stabilizes the V
CC
bus. The
energy stored in the bypass capacitors will be re-
leased as low going spikes are generated or ener-
gy will be absorbed when overshoots occur.
A ceramic bypass capacitor value of 0.1
μ
F is rec-
ommended in order to providethe neededfiltering.
In addition to transients that are caused by normal
SRAM operation,power cycling cangenerate neg-
ative voltage spikes on V
CC
that drive it to values
below V
SS
by as much as onevolt. These negative
spikes can cause data corruption in the SRAM
while in battery backup mode.
To protect from these voltage spikes, ST recom-
mends connecting a schottky diode from V
CC
to
Figure 13. Supply Voltage Protection
AI02169
VCC
0.1
μ
F
DEVICE
VCC
VSS
V
SS
(cathode connected to V
CC
, anode to V
SS
).
(Schottky diode 1N5817 is recommended for
through hole and MBRS120T3 is recommended
for surface mount).
Table 16. Default Values
Note: 1. WDS, BMB0-BMB4, RB0, RB1.
2. State of other control bits undefined.
3. State of other control bits remains unchanged.
4. Assuming these bits set to ‘1’ prior to power-down.
Condition
W
R
FT
AFE
ABE
WATCHDOG
Register
(1)
Initial Power-up
(Battery Attach for SNAPHAT)
(2)
0
0
0
0
0
0
Subsequent Power-up / RESET
(3)
0
0
0
0
0
0
Power-down
(4)
0
0
0
1
1
0
相关PDF资料 |
PDF描述 |
|---|---|
| M48T212YSH | Hook-Up Wire; Conductor Size AWG:24; No. Strands x Strand Size:Solid; Jacket Color:Red; Approval Bodies:UL, CSA; Approval Categories:UL AWM Style 1061; CSA AWM; Conductor Material:Copper; Conductor Plating:Tin RoHS Compliant: Yes |
| M48T212Y-85MH6TR | 5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212Y | 5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212YMH | 5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212Y-85MH1 | Shielded Multiconductor Cable; Number of Conductors:6; Conductor Size AWG:24; No. Strands x Strand Size:7 x 32; Jacket Material:Polyvinylchloride (PVC); Leaded Process Compatible:Yes; Conductor Material:Copper; Temperature Max:80 C RoHS Compliant: Yes |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M48T212Y-85MH1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212Y-85MH1E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212Y-85MH1F | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212Y-85MH1TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212Y-85MH6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
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