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M48T129Y-70PM1

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28
List of figures M48T129V, M48T129Y
4/28 Doc ID 5710 Rev 5
List of figures
Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. 32-pin module connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4. Chip enable or output enable controlled, READ mode AC waveforms. . . . . . . . . . . . . . . . . 8
Figure 5. Address controlled, READ mode AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 6. WRITE enable controlled, WRITE AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 7. Chip enable controlled, WRITE AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 8. Crystal accuracy across temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 9. Calibration waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 10. Alarm interrupt reset waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 11. Backup mode alarm waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 12. Supply voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 13. AC testing load circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 14. Power down/up mode AC waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 15. PMDIP32 – 32-pin plastic DIP module, package outline . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 16. Recycling symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Obsolete Product(s) - Obsolete Product(s)
M48T129V, M48T129Y Description
Doc ID 5710 Rev 5 5/28
1 Description
The M48T129Y/V TIMEKEEPER
®
RAM is a 128 Kb x 8 non-volatile static RAM and real-
time clock with programmable alarms and a watchdog timer. The special DIP package
provides a fully integrated battery-backed memory and real-time clock solution. The
M48T129Y/V directly replaces industry standard 128 Kb x 8 SRAM. It also provides the non-
volatility of Flash without any requirement for special WRITE timing or limitations on the
number of WRITEs that can be performed.
The 32-pin, 600 mil DIP hybrid houses a controller chip, SRAM, quartz crystal, and a long-
life lithium button cell in a single package.
Figure 1. Logic diagram
Table 1. Signal names
A0-A16 Address inputs
DQ0-DQ7 Data Inputs / outputs
E
Chip enable input
G Output enable input
W WRITE enable input
RST Reset output (open drain)
IRQ/FT Interrupt / frequency test output (open drain)
V
CC
Supply voltage
V
SS
Ground
AI02260
17
A0-A16 DQ0-DQ7
V
CC
M48T129Y
M48T129V
G
V
SS
8
E
W RST
IRQ/FT
Obsolete Product(s) - Obsolete Product(s)
Description M48T129V, M48T129Y
6/28 Doc ID 5710 Rev 5
Figure 2. 32-pin module connections
Figure 3. Block diagram
A1
A0
DQ0
A7
A4
A3
A2
A6
A5
A13
A10
A8
A9
DQ7
A15
A11
G
E
DQ5DQ1
DQ2
DQ3V
SS
DQ4
DQ6
A16
RSTV
CC
AI02261
10
1
2
5
6
7
8
9
11
12
13
14
15
16
30
29
26
25
24
23
22
21
20
19
18
17
A12
A14
W
IRQ/FT
3
4
28
27
32
31
M48T129Y
M48T129V
AI02583
LITHIUM
CELL
OSCILLATOR AND
CLOCK CHAIN
V
PFD
V
CC
V
SS
32,768 Hz
CRYSTAL
VOLTAGE SENSE
AND
SWITCHING
CIRCUITRY
16 x 8
TIMEKEEPER
REGISTERS
131,056 x 8
SRAM ARRAY
A0-A16
DQ0-DQ7
E
W
G
POWER
RST
IRQ/FT
Obsolete Product(s) - Obsolete Product(s)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28

M48T129Y-70PM1

Mfr. #:
Buy M48T129Y-70PM1
Manufacturer:
STMicroelectronics
Description:
IC RTC CLK/CALENDAR PAR 32-DIP
Lifecycle:
New from this manufacturer.
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