M48T37Y-70MH1E STMicroelectronics, M48T37Y-70MH1E Datasheet - Page 27

• 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
7
Caution:
Part numbering
Table 17.
1. The SOIC package (SOH44) requires the SNAPHAT
2. Not recommended for new design. Contact ST sales office for availability.
Do not place the SNAPHAT battery package “M4TXX-BR12SH” in conductive foam as it will
drain the lithium button-cell battery.
For other options, or for more information on any aspect of this device, please contact the
ST sales office nearest you.
Table 18.
Example:
Device type
M48T
Supply voltage and write protect voltage
37Y = V
37V = V
Speed
–70 = 70 ns (37Y)
–10 = 100 ns (37V)
Package
MH
Temperature range
1 = 0 to 70 °C
6 = –40 to 85 °C
Shipping method
blank = tubes (not for new design - use E)
E = ECOPACK
F = ECOPACK
TR = tape & reel (not for new design - use F)
the part number “M4TXX-BR12SH” in plastic tube or “M4TXX-BR12SHTR” in tape & reel form (see
Table
(1)
M4T28-BR12SH
M4T32-BR12SH
Part number
= SOH44
CC
CC
).
= 4.5 to 5.5 V; V
= 3.0 to 3.6 V; V
Ordering information scheme
SNAPHAT® battery table
®
®
(2)
package, tubes
package, tape & reel
PFD
PFD
Lithium battery (120 mAh) SNAPHAT
= 4.2 to 4.5 V
= 2.7 to 3.0 V
Lithium battery (48 mAh) SNAPHAT
Doc ID 7019 Rev 9
M48T
Description
®
battery package which is ordered separately under
37Y
–70
®
®
MH
Part numbering
Package
1
SH
SH
E
27/30