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参数资料
| 型号： | M48T212YSH |
| 厂商： | 意法半导体 |
| 英文描述： | 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 |
| 中文描述： | 5V/3.3V计时[控制器 |
| 文件页数： | 9/23页 |
| 文件大小： | 150K |
| 代理商： | M48T212YSH |
9/23
M48T212Y, M48T212V
Figure 7. Read Cycle Timing: RTC Control Signals
AI02640
W
DQ7-DQ0
G
DATA OUT
VALID
ADDRESS
tAVAV
E
tELQV
tAVAV
tAVAV
READ
READ
WRITE
DATA IN
VALID
DATA OUT
VALID
tAVQV
tWHAX
tAVWL
tELQX
tGLQV
tGHQZ
tWLWH
tAXQX
tGLQX
Table 10. Read Mode Characteristics
(T
A
= 0 to 70
°
C)
Note: 1. C
L
= 5pF
Symbol
Parameter
M48T212Y
M48T212V
Unit
-70
-85
Min
Max
Min
Max
t
AVAV
Read Cycle Time
70
85
ns
t
AVQV
Address Valid to Output Valid
70
85
ns
t
ELQV
Chip Enable Low to Output Valid
70
85
ns
t
GLQV
Output Enable Low to Output Valid
25
35
ns
t
ELQX(1)
Chip Enable Low to Output Transition
5
5
ns
t
GLQX(1)
Output Enable Low to Output Transition
0
0
ns
t
EHQZ(1)
Chip Enable High to Output Hi-Z
20
25
ns
t
GHQZ(1)
Output Enable High to Output Hi-Z
20
25
ns
t
AXQX
Address Transition to Output Transition
5
5
ns
READ MODE
The M48T212Y/V executes a read cycle whenev-
er W (Write Enable) is high and E (Chip Enable) is
low. The unique address specified by the address
inputs (A3-A0) defines which one of the on-chip
TIMEKEEPER registers is to be accessed. When
the address presented to the M48T212Y/V is in
the range of 0h-Fh, one of the on-board TIME-
KEEPER registers is accessed and valid data will
be available to the eight data output drivers within
t
AVQV
after the address input signal is stable, pro-
viding that the E and G access times are also sat-
isfied.If they are not, then data access must be
measured from the latter occurring signal (E or G)
and the limiting parameter is either t
ELQV
for E or
t
GLQV
for G rather than the address access time.
When EX input is low, an external SRAM location
will be selected.
Note:
Care should be taken to avoid takingboth E
and EX low simultaneously to avoid bus conten-
tion.
相关PDF资料 |
PDF描述 |
|---|---|
| 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 |
| M48T212Y-85MH1TR | Multiconductor Cable; Number of Conductors:7; 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 |
|---|---|
| M48T248V | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
| M48T248V-70PM1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
| M48T248V-70PM1TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
| M48T248V-85PM1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
| M48T248V-85PM1TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.3V, 1024K TIMEKEEPER SRAM with PHANTOM |
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