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

M48T37Y, M48T37V
5
Note:
Note:
DC and AC parameters
This section summarizes the operating and measurement 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 measurement conditions listed in the
relevant tables. Designers should check that the operating conditions in their projects match
the measurement conditions when using the quoted parameters.
Table 9.
Output Hi-Z is defined as the point where data is no longer driven.
Figure 12. AC testing load circuit
1. 50 pF for M48T37V.
Excluding open-drain output pins
Table 10.
1. Effective capacitance measured with power supply at 5 V. Sampled only, not 100% tested.
2. At 25 °C, f = 1 MHz.
3. Outputs deselected.
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
IO
IN
(3)
Operating and AC measurement conditions
Capacitance
CC
)
L
)
Parameter
Input / output capacitance
Input capacitance
C L includes JIG capacitance
Parameter
DEVICE
UNDER
TEST
Doc ID 7019 Rev 9
A
)
(1)(2)
Grade 1
Grade 6
C L = 100pF
645Ω
(1)
M48T37Y
4.5 to 5.5
–40 to 85
0 to 70
0 to 3
≤ 10
100
1.5
Min
-
-
1.75V
DC and AC parameters
M48T37V
3.0 to 3.6
–40 to 85
0 to 70
0 to 3
≤ 10
1.5
50
Max
10
10
Unit
Unit
°C
°C
pF
ns
pF
pF
V
V
V
AI02325
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