M48T37Y-70MH1E STMicroelectronics, M48T37Y-70MH1E Datasheet - Page 21

• Manufacturer Part Number: M48T37Y-70MH1E
• Description: IC TIMEKPR NVRAM 256KBIT5V 44SOH
• Manufacturer: STMicroelectronics
• Series: Timekeeper®r
• Type: Clock/Calendar/NVSRAMr

Specifications of M48T37Y-70MH1E

• 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: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-SOH
• Bus Type: Parallel
• User Ram: 32KB
• Operating Supply Voltage (typ): 5V
• Package Type: SOH
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Pin Count: 44
• Mounting: Surface Mount
• Memory Configuration: 32K X 8
• Nvram Features: RTC
• Interface Type: Parallel
• Access Time: 70ns
• Supply Voltage Range: 4.5V To 5.5V
• Memory Case Style: SOIC
• No. Of Pins: 44
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2854-5; M48T37Y-70MH1

DC AND AC PARAMETERS
This section summarizes the operating and mea-
surement conditions, as well as the DC and AC
characteristics of the device. The parameters in
the following DC and AC Characteristic tables are
derived from tests performed under the Measure-
Table 9. Operating and AC Measurement Conditions
Note: Output Hi-Z is defined as the point where data is no longer driven.
Figure 13. AC Testing Load Circuit
Note: Excluding open-drain output pins
Table 10. Capacitance
Note: 1. Effective capacitance measured with power supply at 5V. Sampled only, not 100% tested.
Supply Voltage (V
Ambient Operating Temperature (T
Load Capacitance (C
Input Rise and Fall Times
Input Pulse Voltages
Input and Output Timing Ref. Voltages
Symbol
C
C L includes JIG capacitance
C
1. ; 50pF for M48T37V.
IO
2. At 25°C, f = 1MHz.
3. Outputs deselected.
DEVICE
UNDER
IN
(3)
TEST
Input Capacitance
Input / Output Capacitance
CC
)
L
)
C L = 100pF
Parameter
645
Parameter
A
(1)
)
AI02325
(1,2)
1.75V
Grade 1
Grade 6
ment Conditions listed in the relevant tables. De-
signers should check that the operating conditions
in their projects match the measurement condi-
tions when using the quoted parameters.
M48T37Y
4.5 to 5.5
–40 to 85
0 to 70
0 to 3
100
1.5
10
Min
M48T37V
3.0 to 3.6
–40 to 85
0 to 70
0 to 3
M48T37Y, M48T37V
1.5
50
Max
10
10
10
Unit
Unit
pF
pF
pF
°C
°C
ns
V
V
V
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