M48T08Y-10MH1F STMicroelectronics, M48T08Y-10MH1F Datasheet

IC TIMEKPR SRAM 64KBIT 5V 28SOIC

M48T08Y-10MH1F

Manufacturer Part Number
M48T08Y-10MH1F
Description
IC TIMEKPR SRAM 64KBIT 5V 28SOIC
Manufacturer
STMicroelectronics
Series
Timekeeper®r
Type
Clock/Calendar/NVSRAMr
Datasheet

Specifications of M48T08Y-10MH1F

Memory Size
64K (8K 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
28-SOIC, 28-SOH (8.48mm Width)
Bus Type
Parallel
User Ram
8KB
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
28
Mounting
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-4710-2

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
M48T08Y-10MH1F
Manufacturer:
ST
0
Features
June 2010
Integrated ultra low power SRAM, real-time
clock, power-fail control circuit, and battery
BYTEWIDE
BCD coded year, month, day, date, hours,
minutes, and seconds
Typical clock accuracy of ±1 minute a month, at
25 °C
Automatic power-fail chip deselect and write
protection
Write protect
V
– M48T08: V
– M48T18/T08Y: V
Software controlled clock calibration for high
accuracy applications
Self-contained battery and crystal in the
CAPHAT
Packaging includes a 28-lead SOIC and
SNAPHAT
SOIC package provides direct connection for a
snaphat top which contains the battery and
crystal
Pin and function compatible with DS1643 and
JEDEC standard 8 K x 8 SRAMs
RoHS compliant
– Lead-free second level interconnect
PFD
4.5 V
4.2 V
= Power-fail deselect voltage):
®
V
V
DIP package
PFD
PFD
top (to be ordered separately)
RAM-like clock access
CC
= 4.75 to 5.5 V
4.5 V
4.75 V
CC
= 4.5 to 5.5 V
5 V, 64 Kbit (8 Kb x 8) TIMEKEEPER
Doc ID 2411 Rev 10
28
M48T08Y, M48T18
28
SNAPHAT
PCDIP28 (PC)
battery/crystal
battery/crystal
1
SOH28 (MH)
CAPHAT™
1
®
(SH)
M48T08
®
SRAM
www.st.com
1/31
1

Related parts for M48T08Y-10MH1F

M48T08Y-10MH1F Summary of contents

Page 1

... Pin and function compatible with DS1643 and JEDEC standard SRAMs ■ RoHS compliant – Lead-free second level interconnect June 2010 Kbit ( TIMEKEEPER Doc ID 2411 Rev 10 M48T08 M48T08Y, M48T18 ® SRAM 28 1 PCDIP28 (PC) battery/crystal CAPHAT™ ® SNAPHAT (SH) battery/crystal ...

Page 2

... Setting the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.3 Stopping and starting the oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.4 Calibrating the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.5 V noise and negative going transients . . . . . . . . . . . . . . . . . . . . . . . . . Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 7 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 8 Environmental information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 2/31 Doc ID 2411 Rev 10 M48T08, M48T08Y, M48T18 ...

Page 3

... M48T08, M48T08Y, M48T18 List of tables Table 1. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 2. Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 3. READ mode AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 4. WRITE mode AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 5. Register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 6. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Table 7. Operating and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table 8. Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table 9. DC characteristics Table 10. Power down/up AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Table 11. ...

Page 4

... Figure 15. SH – 4-pin SNAPHAT Figure 16. SH – 4-pin SNAPHAT Figure 17. Recycling symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4/31 ® housing for 48 mAh battery & crystal, package outline ® housing for 120 mAh battery & crystal, package outline Doc ID 2411 Rev 10 M48T08, M48T08Y, M48T18 ® , package outline . . . 24 ...

Page 5

... M48T08, M48T08Y, M48T18 1 Description The M48T08/18/08Y TIMEKEEPER time clock which is pin and function compatible with the DS1643. The monolithic chip is available in two special packages to provide a highly integrated battery-backed memory and real-time clock solution. The M48T08/18/08Y is a non-volatile pin and function equivalent to any JEDEC standard SRAM ...

Page 6

... V CC A12 A11 M48T08 A10 M48T18 DQ7 DQ0 11 18 DQ6 DQ1 12 17 DQ5 DQ2 13 16 DQ4 DQ3 INT 1 28 A12 M48T08Y DQ0 11 18 DQ1 12 17 DQ2 Doc ID 2411 Rev 10 M48T08, M48T08Y, M48T18 AI01182 A11 G A10 E1 DQ7 DQ6 DQ5 DQ4 DQ3 AI01021B ...

Page 7

... M48T08, M48T08Y, M48T18 Figure 4. Block diagram OSCILLATOR AND 32,768 Hz CRYSTAL LITHIUM CELL CLOCK CHAIN POWER VOLTAGE SENSE V PFD AND SWITCHING CIRCUITRY V CC INT Doc ID 2411 Rev 10 Description BiPORT SRAM ARRAY A0-A12 DQ0-DQ7 8184 x 8 SRAM ARRAY AI01333 7/31 ...

Page 8

... (1) ( for details. = Battery backup switchover voltage. SO Doc ID 2411 Rev 10 M48T08, M48T08Y, M48T18 falls below the DQ0-DQ7 Power X High Z Standby X High Z Standby V D Active Active IH OUT V High Z Active IH X High Z CMOS standby X High Z Battery backup mode is out ...

Page 9

... M48T08, M48T08Y, M48T18 2.1 READ mode The M48T08/18/08Y is in the READ mode whenever W (WRITE enable) is high, E1 (chip enable 1) is low, and E2 (chip enable 2) is high. The device architecture allows ripple- through access of data from eight of 65,536 locations in the static storage array. Thus, the unique address specified by the 13 address inputs defines which one of the 8,192 bytes of data accessed ...

Page 10

... E2, a low on W will disable the outputs t 10/31 (1) –100/–10 (T08Y ° from chip enable or t E1HAX E2LAX afterward. G should be kept high during WRITE cycles to WHDX Doc ID 2411 Rev 10 M48T08, M48T08Y, M48T18 M48T08/M48T18/T08Y –150/–15 (T08Y) Min Max Min Max 100 150 100 150 100 150 ...

Page 11

... M48T08, M48T08Y, M48T18 Figure 6. WRITE enable controlled, WRITE AC waveform A0-A12 DQ0-DQ7 Figure 7. Chip enable controlled, WRITE AC waveforms A0-A12 tAVE1L E1 tAVE2H E2 W DQ0-DQ7 tAVAV VALID tAVWH tAVE1L tAVE2H tWLWH tAVWL tWLQZ tDVWH tAVAV VALID tAVE1H tE1LE1H tAVE2L tE2HE2L tAVWL DATA INPUT tDVE1H ...

Page 12

... WRITE enable high to output transition WHQX 1. Valid for ambient operating temperature: T 12/31 M48T08/M48T18/T08Y (1) –100/–10 (T08Y) Min 100 ° 4. 4.5 to 5.5 V (except where noted Doc ID 2411 Rev 10 M48T08, M48T08Y, M48T18 –150/–15 (T08Y) Unit Max Min Max 150 100 ns 130 ns 130 ...

Page 13

... M48T08, M48T08Y, M48T18 2.3 Data retention mode With valid V applied, the M48T08/18/08Y operates as a conventional BYTEWIDE™ static CC RAM. Should the supply voltage decay, the RAM will automatically power-fail deselect, write protecting itself when V become high impedance, and all inputs are treated as “Don't care.” ...

Page 14

... See the application note AN923, “TIMEKEEPER information on century rollover. 14/31 ® registers should be halted before clock data is read to must be written to '0' to allow for normal TIMEKEEPER and RAM ® rolling Into the 21 Doc ID 2411 Rev 10 M48T08, M48T08Y, M48T18 Table 5). Resetting the st century” for ...

Page 15

... M48T08, M48T08Y, M48T18 Table 5. Register map Address D7 1FFFh 1FFEh 0 1FFDh 0 1FFCh 0 1FFBh 0 1FFAh 0 1FF9h ST 1FF8h W Keys SIGN bit FT = FREQUENCY TEST bit (set to '0' for normal clock operation READ bit W = WRITE bit ST = STOP bit 0 = Must be set to '0' 3.3 Stopping and starting the oscillator The oscillator may be stopped at any time ...

Page 16

... READ of the seconds register, but without having the READ bit set. The FT bit MUST be reset to '0' for normal clock operations to resume. For more information on calibration, see the application note AN934, “TIMEKEEPER calibration.” 16/31 17. The number of times pulses are blanked (subtracted, Doc ID 2411 Rev 10 M48T08, M48T08Y, M48T18 ® ...

Page 17

... M48T08, M48T08Y, M48T18 Figure 8. Crystal accuracy across temperature ppm 20 0 -20 -40 -60 -80 -100 Figure 9. Clock calibration NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION ΔF = -0.038 ppm Doc ID 2411 Rev 10 Clock operations 10 AI02124 AI00594B 17/31 ...

Page 18

... MBRS120T3 is recommended for surface mount. Figure 10. Supply voltage protection 18/31 bus. These transients can be reduced if CC that drive it to values below (cathode connected 0.1µF Doc ID 2411 Rev 10 M48T08, M48T08Y, M48T18 bus. The energy stored in the much anode Schottky diode DEVICE V SS AI02169 ...

Page 19

... M48T08, M48T08Y, M48T18 4 Maximum ratings Stressing the device above the rating listed in the absolute maximum ratings table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the operating sections of this specification is not implied ...

Page 20

... Effective capacitance measured with power supply sampled only, not 100% tested ° MHz. 3. Outputs deselected. 20/31 M48T08 ) 4. 100 1.5 5V DEVICE UNDER TEST 1kΩ includes JIG capacitance (1)(2) Parameter Doc ID 2411 Rev 10 M48T08, M48T08Y, M48T18 M48T18/T08Y 4 100 1.5 1.8kΩ OUT 100pF Min Max - Unit V ° AI01019 ...

Page 21

... M48T08, M48T08Y, M48T18 Table 9. DC characteristics Symbol Parameter I Input leakage current LI (2) I Output leakage current LO I Supply current CC (3) I Supply current (standby) TTL CC1 (3) I Supply current (standby) CMOS CC2 V Input low voltage IL V Input high voltage IH Output low voltage V OL ...

Page 22

... PFD fall time of less than t may cause corruption of RAM data. FB (1)(2) Parameter M48T08 M48T18/T08Y . ° 8.5 years (typ °C. Requires use of M4T32-BR12SH SNAPHAT DR Doc ID 2411 Rev 10 M48T08, M48T08Y, M48T18 Min Max 0 300 120 = 4. 4.5 to 5.5 V (except where CC Min Typ Max 4 ...

Page 23

... M48T08, M48T08Y, M48T18 6 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ® ECOPACK trademark. Figure 13. PCDIP28 – 28-pin plastic DIP, battery CAPHAT™, package outline Note: Drawing is not to scale ...

Page 24

... Doc ID 2411 Rev 10 M48T08, M48T08Y, M48T18 ® , package C eB α ® , package mech. inches Typ Min 0.002 0.092 0.014 0.006 0.697 0.324 0.050 – ...

Page 25

... M48T08, M48T08Y, M48T18 Figure 15. SH – 4-pin SNAPHAT outline Note: Drawing is not to scale. Table 14. SH – 4-pin SNAPHAT data Symb ® housing for 48 mAh battery & crystal, package ® housing for 48 mAh battery & crystal, package mech. mm Typ Min Max 9.78 6 ...

Page 26

... Min Max 10.54 8.00 8.51 7.24 8.00 0.38 0.46 0.56 21.21 21.84 17.27 18.03 15.55 15.95 3.20 3.61 2.03 2.29 Doc ID 2411 Rev 10 M48T08, M48T08Y, M48T18 inches Typ Min Max 0.415 0.315 .0335 0.285 0.315 0.015 0.018 0.022 0.835 0.860 0.680 ...

Page 27

... The SOIC package (SOH28) requires the SNAPHAT under the part number “M4TXX-BR12SH” in plastic tube or “M4TXX-BR12SHTR” in tape & reel form (see Table 17). The M48T08Y part is offered in the SOH28 (SNAPHAT) package only. Caution: Do not place the SNAPHAT will drain the lithium button-cell battery. ...

Page 28

... Part numbering Table 17. SNAPHAT Part number M4T28-BR12SH M4T32-BR12SH 28/31 ® battery table Description Lithium battery (48 mAh) SNAPHAT Lithium battery (120 mAh) SNAPHAT Doc ID 2411 Rev 10 M48T08, M48T08Y, M48T18 Package ® SH ® SH ...

Page 29

... M48T08, M48T08Y, M48T18 8 Environmental information Figure 17. Recycling symbols This product contains a non-rechargeable lithium (lithium carbon monofluoride chemistry) button cell battery fully encapsulated in the final product. Recycle or dispose of batteries in accordance with the battery manufacturer's instructions and local/national disposal and recycling regulations. Please refer to the following web site address for additional information regarding compliance statements and waste recycling www.st.com/rtc, then select " ...

Page 30

... Reformatted; SNAPHAT battery table added 3 temp./voltage info. to tables 3.1 Reference to App. Note corrected in “Calibrating the Clock” section 3.2 Changes to text in document to reflect addition of M48T08Y option 3.3 Fix Ordering Information table and add to footnote 3.4 Modify reflow time and temperature footnotes 3.5 ...

Page 31

... M48T08, M48T08Y, M48T18 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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