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M48T12-150PC1

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25
List of figures M48T02, M48T12
4/25 Doc ID 2410 Rev 9
List of figures
Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. DIP connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4. READ mode AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5. WRITE enable controlled, WRITE AC waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 6. Chip enable controlled, WRITE AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 7. Checking the BOK flag status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 8. Crystal accuracy across temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 9. Clock calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 10. Supply voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 11. AC testing load circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 12. Power down/up mode AC waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 13. PCDIP24 – 24-pin plastic DIP, battery CAPHAT™, package outline . . . . . . . . . . . . . . . . . 21
Figure 14. Recycling symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
M48T02, M48T12 Description
Doc ID 2410 Rev 9 5/25
1 Description
The M48T02/12 TIMEKEEPER
®
RAM is a 2 Kb x 8 non-volatile static RAM and real-time
clock which is pin and functional compatible with the DS1642.
A special 24-pin, 600 mil DIP CAPHAT
™
package houses the M48T02/12 silicon with a
quartz crystal and a long life lithium button cell to form a highly integrated battery-backed
memory and real-time clock solution.
The M48T02/12 button cell has sufficient capacity and storage life to maintain data and
clock functionality for an accumulated time period of at least 10 years in the absence of
power over the operating temperature range.
The M48T02/12 is a non-volatile pin and function equivalent to any JEDEC standard
2 Kb x 8 SRAM. It also easily fits into many ROM, EPROM, and EEPROM sockets,
providing the non-volatility of PROMs without any requirement for special WRITE timing or
limitations on the number of WRITEs that can be performed.
Figure 1. Logic diagram
Table 1. Signal names
A0-A10 Address inputs
DQ0-DQ7 Data inputs / outputs
E Chip enable
G Output enable
W WRITE enable
V
CC
Supply voltage
V
SS
Ground
AI01027
11
A0-A10
W
DQ0-DQ7
V
CC
M48T02
M48T12
G
V
SS
8
E
Description M48T02, M48T12
6/25 Doc ID 2410 Rev 9
Figure 2. DIP connections
Figure 3. Block diagram
A1
A0
DQ0
A7
A4
A3
A2
A6
A5
A10
A8
A9
DQ7
W
G
E
DQ5DQ1
DQ2
DQ3V
SS
DQ4
DQ6
V
CC
AI01028
M48T02
M48T12
8
1
2
3
4
5
6
7
9
10
11
12
16
15
24
23
22
21
20
19
18
17
14
13
AI01329
LITHIUM
CELL
OSCILLATOR AND
CLOCK CHAIN
V
PFD
V
CC
V
SS
32,768 Hz
CRYSTA L
VOLTAGE SENSE
AND
SWITCHING
CIRCUITRY
8 x 8 BiPORT
SRAM ARRAY
2040 x 8
SRAM ARRAY
A0-A10
DQ0-DQ7
E
W
G
POWER
BOK
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P25

M48T12-150PC1

Mfr. #:
Buy M48T12-150PC1
Manufacturer:
STMicroelectronics
Description:
Real Time Clock 16K (2Kx8) 150ns
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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