M48T37Y-70MH6E STMicroelectronics, M48T37Y-70MH6E Datasheet - Page 9

• Manufacturer Part Number: M48T37Y-70MH6E
• Description: IC TIMEKPR NVRAM 256KBIT5V 44SOH
• Manufacturer: STMicroelectronics
• Series: Timekeeper®r
• Type: Clock/Calendar/NVSRAMr

Specifications of M48T37Y-70MH6E

• Memory Size: 256K (32K x 8)
• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-SOH
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-2855-5; M48T37Y-70MH6

M48T37Y, M48T37V
Note:
met, valid data will be available after the latter of the chip enable access time (t
output enable access time (t
The state of the eight three-state data I/O signals is controlled by E and G. If the outputs are
activated before t
If the address inputs are changed while E and G remain active, output data will remain valid
for output data hold time (t
Figure 4.
WRITE enable (W) = high.
Table 3.
1. Valid for ambient operating temperature: T
2. C
Symbol
t
t
t
t
GHQZ
ELQX
GLQX
EHQZ
t
t
t
t
A0-A14
E
G
DQ0-DQ7
t
(except where noted).
AVQV
GLQV
AXQX
ELQV
AVAV
L
= 5 pF.
(2)
(2)
(2)
(2)
READ cycle time
Address valid to output valid
Chip enable low to output valid
Output enable low to output valid
Chip enable low to output transition
Output enable low to output transition
Chip enable high to output Hi-Z
Output enable high to output Hi-Z
Address transition to output transition
READ mode AC waveforms
READ mode AC characteristics
AVQV
, the data lines will be driven to an indeterminate state until t
Parameter
AXQX
GLQV
Doc ID 7019 Rev 9
tAVQV
tELQX
) but will be indeterminate until the next address access.
tGLQX
tELQV
).
(1)
tGLQV
A
= 0 to 70 °C or –40 to 85 °C; V
tAVAV
VALID
Min
70
10
5
5
M48T37Y
–70
Max
VALID
70
70
35
25
25
CC
= 4.5 to 5.5 V or 3.0 to 3.6 V
tGHQZ
Min
100
10
10
5
M48T37V
–100
Operation modes
Max
100
100
50
50
40
ELQV
AVQV
tAXQX
tEHQZ
) or
AI00925
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
.
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