M41T0 Serial real-time clock Features ■ Counters for seconds, minutes, hours, day, date, month, years, and century ■ 32 KHz crystal oscillator integrating load capacitance (12.5 pF) providing exceptional oscillator stability and high crystal series resistance operation ■ Oscillator stop detection monitors clock operation ■ Serial interface supports I2C bus (400 kHz protocol) ■ Low standby current 0.9 µA (typ at 3 V) ■ 2.0 to 5.5 V clock operating voltage ■ Special software programmable output ■ Operating temperature of –40 to 85 °C June 2011 8 1 SO8 Doc ID 9105 Rev 7 1/23 www.st.com 1 Contents M41T0 Contents 1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 3 2-wire bus characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1.1 Bus not busy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1.2 Start data transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1.3 Stop data transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1.4 Data valid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.1.5 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2 READ mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3 WRITE mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Clock operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.1 Output driver pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.2 Oscillator stop detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.3 Initial power-on defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 6 Package mechanical information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2/23 Doc ID 9105 Rev 7 M41T0 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Operating and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 DC characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Crystal electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 SO8 – 8-lead plastic small outline, 150 mils body width, package mechanical data . . . . . 18 Carrier tape dimensions for SO8 package (150 mils body width). . . . . . . . . . . . . . . . . . . . 19 Reel dimensions for 12 mm carrier tape - SO8 package (150 mils body width) . . . . . . . . . 20 Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Doc ID 9105 Rev 7 3/23 List of figures M41T0 List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. 4/23 Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 SOIC connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Serial bus data transfer sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Acknowledgement sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Bus timing requirements sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Slave address location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 READ mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Alternate READ mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 WRITE mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 AC testing input/output waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 SO8 – 8-lead plastic small outline, 150 mils body width, package mechanical drawing. . . 18 Carrier tape for SO8 package (150 mils body width) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Reel schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Doc ID 9105 Rev 7 M41T0 1 Description Description The M41T0 real-time clock is a low power serial real-time clock with a built-in 32.768 kHz oscillator (external crystal controlled). Eight registers are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. Addresses and data are transferred serially via a two-line bidirectional bus. The built-in address register is incremented automatically after each WRITE or READ data byte. The M41T0 is supplied in 8-lead plastic small outline package. Figure 1. Logic diagram VCC OSCO OSCI M41T0 SCL SDA OUT VSS AI07028 Figure 2. SOIC connections M41T0 OSCI OSCO NF(1) VSS 1 2 3 4 8 7 6 5 VCC OUT SCL SDA AI07029 1. NF pin must be tied to VSS. Table 1. Signal names OSCI Oscillator input OCSO Oscillator output OUT Output driver (open drain) SDA Serial data address input / output SCL Serial clock NF (1) No function VCC Supply voltage VSS Ground 1. NF pin must be tied to VSS. Doc ID 9105 Rev 7 5/23 Description M41T0 Figure 3. Block diagram 1 Hz OSCI SECONDS OSCILLATOR 32.768 kHz DIVIDER OSCO MINUTES OUT CENTURY/HOURS CONTROL LOGIC VCC VSS DAY DATE MONTH SCL SERIAL BUS INTERFACE YEAR ADDRESS REGISTER SDA CONTROL AI07030 6/23 Doc ID 9105 Rev 7 M41T0 2 Operation Operation The M41T0 clock operates as a slave device on the serial bus. Access is obtained by implementing a start condition followed by the correct slave address (D0h). The 8 bytes contained in the device can then be accessed sequentially in the following order: 2.1 1. Seconds register 2. Minutes register 3. Century/hours register 4. Day register 5. Date register 6. Month register 7. Years register 8. Control register 2-wire bus characteristics This bus is intended for communication between different ICs. It consists of two lines: one bidirectional for data signals (SDA) and one for clock signals (SCL). Both the SDA and the SCL lines must be connected to a positive supply voltage via a pull-up resistor. The following protocol has been defined: ● Data transfer may be initiated only when the bus is not busy. ● During data transfer, the data line must remain stable whenever the clock line is high. Changes in the data line while the clock line is high will be interpreted as control signals. Accordingly, the following bus conditions have been defined: 2.1.1 Bus not busy Both data and clock lines remain high. 2.1.2 Start data transfer A change in the state of the data line, from high to low, while the clock is high, defines the START condition. 2.1.3 Stop data transfer A change in the state of the data line, from low to high, while the clock is high, defines the STOP condition. Doc ID 9105 Rev 7 7/23 Operation 2.1.4 M41T0 Data valid The state of the data line represents valid data when after a start condition, the data line is stable for the duration of the high period of the clock signal. The data on the line may be changed during the low period of the clock signal. There is one clock pulse per bit of data. Each data transfer is initiated with a start condition and terminated with a stop condition. The number of data bytes transferred between the start and stop conditions is not limited. The information is transmitted byte-wide and each receiver acknowledges with a ninth bit. By definition, a device that gives out a message is called “transmitter”, the receiving device that gets the message is called “receiver”. The device that controls the message is called “master”. The devices that are controlled by the master are called “slaves”. 2.1.5 Acknowledge Each byte of eight bits is followed by one acknowledge bit. this acknowledge bit is a low level put on the bus by the receiver, whereas the master generates an extra acknowledge related clock pulse. A slave receiver which is addressed is obliged to generate an acknowledge after the reception of each byte. Also, a master receiver must generate an acknowledge after the reception of each byte that has been clocked out of the slave transmitter. The device that acknowledges has to pull down the SDA line during the acknowledge clock pulse in such a way that the SDA line is a stable Low during the High period of the acknowledge related clock pulse. Of course, setup and hold times must be taken into account. A master receiver must signal an end-of-data to the slave transmitter by not generating an acknowledge on the last byte that has been clocked out of the slave. In this case, the transmitter must leave the data line high to enable the master to generate the STOP condition. Figure 4. Serial bus data transfer sequence DATA LINE STABLE DATA VALID CLOCK DATA START CONDITION CHANGE OF DATA ALLOWED STOP CONDITION AI00587 8/23 Doc ID 9105 Rev 7 M41T0 Operation Figure 5. Acknowledgement sequence CLOCK PULSE FOR ACKNOWLEDGEMENT START SCLK FROM MASTER 1 DATA OUTPUT BY TRANSMITTER 2 8 MSB 9 LSB DATA OUTPUT BY RECEIVER AI00601 Figure 6. Bus timing requirements sequence SDA tBUF tHD:STA tHD:STA tR tF SCL tHIGH P S tLOW tSU:DAT tHD:DAT tSU:STA SR tSU:ST P AI00589 1. P = STOP and S = START Doc ID 9105 Rev 7 9/23 Operation M41T0 Table 2. AC characteristics Parameter(1) Symbol Min Typ Max Unit 400 kHz fSCL SCL clock frequency tLOW Clock low period 1.3 µs tHIGH Clock high period 600 ns 0 tR SDA and SCL rise time 300 ns tF SDA and SCL fall time 300 ns tHD:STA START condition hold time (after this period the first clock pulse is generated) 600 ns tSU:STA START condition setup time (only relevant for a repeated start condition) 600 ns tSU:DAT Data setup time 100 ns tHD:DAT(2) Data hold time 0 µs STOP condition setup time 600 ns Time the bus must be free before a new transmission can start 1.3 µs tSU:STO tBUF 1. Valid for ambient operating temperature: TA = –40 to 85 °C; VCC = 2.0 to 5.5 V (except where noted). 2. Transmitter must internally provide a hold time to bridge the undefined region (300 ns max.) of the falling edge of SCL. 2.2 READ mode In this mode, the master reads the M41T0 slave after setting the slave address (see Figure 7). Following the WRITE mode control bit (R/W = 0) and the acknowledge bit, the word address An is written to the on-chip address pointer. Next the START condition and slave address are repeated, followed by the READ mode control bit (R/W = 1). At this point, the master transmitter becomes the master receiver. The data byte which was addressed will be transmitted and the master receiver will send an acknowledge bit to the slave transmitter. The address pointer is only incremented on reception of an acknowledge bit. The M41T0 slave transmitter will now place the data byte at address An+1 on the bus. The master receiver reads and acknowledges the new byte and the address pointer is incremented to An+2. This cycle of reading consecutive addresses will continue until the master receiver sends a STOP condition to the slave transmitter. An alternate READ mode may also be implemented, whereby the master reads the M41T0 slave without first writing to the (volatile) address pointer. The first address that is read is the last one stored in the pointer (see Figure 9 on page 12). 10/23 Doc ID 9105 Rev 7 M41T0 2.3 Operation WRITE mode In this mode the master transmitter transmits to the M41T0 slave receiver. Bus protocol is shown in Figure 10 on page 12. Following the START condition and slave address, a logic '0' (R/W = 0) is placed on the bus and indicates to the addressed device that word address An will follow and is to be written to the on-chip address pointer. The data word to be written to the memory is strobed in next and the internal address pointer is incremented to the next memory location within the RAM on the reception of an acknowledge clock. The M41T0 slave receiver will send an acknowledge clock to the master transmitter after it has received the slave address and again after it has received the word address and each data byte (see Figure 7). Figure 7. Slave address location R/W SLAVE ADDRESS 1 A LSB MSB START 1 0 1 0 0 0 AI00602 R/W SLAVE ADDRESS ACK DATA n+1 ACK DATA n ACK BUS ACTIVITY: S ACK WORD ADDRESS (An) STOP SLAVE ADDRESS DATA n+X P AI00899 NO ACK S R/W SDA LINE ACK BUS ACTIVITY: MASTER START READ mode sequence START Figure 8. Doc ID 9105 Rev 7 11/23 Operation P NO ACK DATA n+X ACK BUS ACTIVITY: DATA n+1 ACK DATA n ACK S ACK SDA LINE R/W BUS ACTIVITY: MASTER STOP Alternate READ mode sequence START Figure 9. M41T0 SLAVE ADDRESS AI00895 STOP SLAVE ADDRESS 12/23 DATA n+X AI00591 Doc ID 9105 Rev 7 P ACK DATA n+1 ACK BUS ACTIVITY: DATA n ACK WORD ADDRESS (An) ACK S R/W SDA LINE ACK BUS ACTIVITY: MASTER START Figure 10. WRITE mode sequence M41T0 3 Clock operation Clock operation The M41T0 is driven by a quartz controlled oscillator with a nominal frequency of 32.768 kHz. The accuracy of the real-time clock depends on the frequency of the quartz crystal that is used as the time-base for the RTC. The M41T0 is tested to meet ± 35 ppm with nominal crystal. The eight-byte clock register (see Table 3 on page 14) is used to both set the clock and to read the date and time from the clock, in a binary coded decimal format. Seconds, minutes, and hours are contained within the first three registers. Bits D6 and D7 of clock register 2 (hours register) contain the CENTURY ENABLE bit (CEB) and the CENTURY bit (CB). Setting CEB to a '1' will cause CB to toggle, either from '0' to '1' or from '1' to '0' at the turn of the century (depending upon its initial state). If CEB is set to a '0', CB will not toggle. Bits D0 through D2 of register 3 contain the day (day of week). Registers 4, 5 and 6 contain the date (day of month), month and years. The final register is the control register. Bit D7 of register 0 contains the STOP bit (ST). Setting this bit to a '1' will cause the oscillator to stop. If the device is expected to spend a significant amount of time on the shelf, the oscillator may be stopped to reduce current drain. When reset to a '0' the oscillator restarts within four seconds (typically one second). The seven clock registers may be read one byte at a time, or in a sequential block. The control register (address location 7) may be accessed independently. Provision has been made to assure that a clock update does not occur while any of the seven clock addresses are being read. If a clock address is being read, an update of the clock registers will be delayed by 250 ms to allow the READ to be completed before the update occurs. This will prevent a transition of data during the READ. Note: This 250 ms delay affects only the clock register update and does not alter the actual clock time. 3.1 Output driver pin The OUT pin is an output driver that reflects the contents of D7 of the control register. In other words, when D7 of location 7 is a '0' then the OUT pin will be driven low. Note: The OUT pin is open drain which requires an external pull-up resistor. 3.2 Oscillator stop detection If the oscillator fail (OF) bit is internally set to a '1,' this indicates that the oscillator has either stopped, or was stopped for some period of time and can be used to judge the validity of the clock and date data. This bit will be set to '1' any time the oscillator stops. The following conditions can cause the OF bit to be set: ● The first time power is applied (defaults to a '1' on power-up). ● The voltage present on VCC is insufficient to support oscillation. ● The ST bit is set to '1.' ● External interference or removal of the crystal. This bit will remain set to '1' until written to logic '0.' The oscillator must start and have run for at least 4 seconds before attempting to reset the OF bit to '0.' This function operates both under normal power and in battery backup. Doc ID 9105 Rev 7 13/23 Clock operation 3.3 M41T0 Initial power-on defaults Upon initial application of power to the device, the OUT bit and OF bit will be set to a '1,' while the ST bit will be set to '0.' All other register bits will initially power-on in a random state. Table 3. Register map(1) Data Address D7 D6 0 ST 1 OF (2) D5 D4 D0 Seconds 00-59 10 minutes Minutes Minutes 00-59 Hours Century/hours 0-1/00-23 Day 01-07 Date Date 01-31 Month Month 01-12 Years Year 00-99 3 X X X 4 X X 10 date 5 X X X CB 10 hours X X Day 10 M. 10 years OUT D1 Seconds CEB 7 D2 10 seconds 2 6 D3 Function/range BCD format 0 X X X X X X Control 1. Keys: ST = STOP bit OUT = Output level X = Don’t care 0 = Must be set to '0.' CEB = Century enable bit CB = Century bit OF = Oscillator fail bit 2. When CEB is set to '1', CB toggles from '0' to '1' or from '1' to '0' at the turn of the century (dependent upon the initial value set). When CEB is set to '0', CB does not toggle. 14/23 Doc ID 9105 Rev 7 M41T0 4 Maximum ratings 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. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 4. Absolute maximum ratings Symbol TSTG Storage temperature (VCC off, oscillator off) VCC Supply voltage TSLD(1) VIO 1. Parameter Lead solder temperature for 10 seconds Input or output voltages Value Unit –55 to 125 °C –0.3 to 7 V 260 °C –0.3 to VCC + 0.3 V IO Output current 20 mA PD Power dissipation 1 W Reflow at peak temperature of 260 °C (total thermal budget not to exceed 245 °C for greater than 30 seconds). Doc ID 9105 Rev 7 15/23 DC and AC parameters 5 M41T0 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 5. Operating and AC measurement conditions(1) Parameter M41T0 Unit Supply voltage (VCC) 2.0 to 5.5 V Ambient operating temperature (TA) –40 to 85 °C Load capacitance (CL) 100 pF Input rise and fall times ≤5 ns Input pulse voltages 0.2VCC to 0.8VCC V Input and output timing ref. voltages 0.3VCC to 0.7VCC V 1. Output Hi-Z is defined as the point where data is no longer driven. Figure 11. AC testing input/output waveform 0.8VCC 0.7VCC 0.3VCC 0.2VCC AI02568 Table 6. Capacitance Parameter(1)(2) Symbol CIN COUT(3) tLP Min Max Unit Input capacitance (SCL) 7 pF Output capacitance (SDA, OUT) 10 pF Low-pass filter input time constant (SDA and SCL) 50 ns 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. 16/23 Doc ID 9105 Rev 7 M41T0 DC and AC parameters Table 7. Sym DC characteristics Test condition(1) Parameter ILI Input leakage current ILO Output leakage current ICC1 Supply current Min Typ Max Unit 0V ≤ VIN ≤ VCC ±1 µA 0V ≤ VOUT ≤ VCC ±1 µA 3.0 V 35 55 µA 5.5 V 130 200 µA 3.0 V 0.9 1.2 µA 31 µA Frequency (SCL) = 400 kHz ICC2(2) Supply current (standby) All inputs = VCC – 0.2 V Frequency (SCL) = 0 Hz 5.5 V VIL Input low voltage –0.3 0.3 VCC V VIH Input high voltage 0.7 VCC VCC + 0.3 V VOL Output low voltage IOL = 3 mA 0.4 V Output low voltage (open drain) IOL = 10 mA 0.4 V 1. Valid for ambient operating temperature: TA = –40 to 85 °C; VCC = 2.0 to 5.5 V (except where noted). 2. At 25 °C. Table 8. Crystal electrical characteristics Parameter(1)(2) Symbol fO Min Resonant frequency RS Series resistance CL Load capacitance Typ Max 32.768 kHz 60(3) 12.5 Unit kΩ pF 1. These values are externally supplied. STMicroelectronics recommends the KDS DT-38: 1TA/1TC252E127, Tuning Fork Type (thru-hole) or the DMX-26S: 1TJS125FH2A212, (SMD) quartz crystal for industrial temperature operations. KDS can be contacted at [email protected] or http://www.kdsj.co.jp for further information on this crystal type. 2. Load capacitors are integrated within the M41T0. Circuit board layout considerations for the 32.768 kHz crystal of minimum trace lengths and isolation from RF generating signals should be taken into account. 3. RS = 40 kΩ when VCC ≤ 2.5 V. Doc ID 9105 Rev 7 17/23 Package mechanical information 6 M41T0 Package mechanical information 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® is an ST trademark. Figure 12. SO8 – 8-lead plastic small outline, 150 mils body width, package mechanical drawing h x 45° A2 A c ccc b e 0.25 mm GAUGE PLANE D k 8 E1 E 1 A1 L L1 SO-A 1. Drawing is not to scale. Table 9. SO8 – 8-lead plastic small outline, 150 mils body width, package mechanical data millimeters inches Symbol Typ Min A Typ Min 1.75 Max 0.069 A1 0.10 A2 1.25 b 0.28 0.48 0.011 0.019 c 0.17 0.23 0.007 0.009 ccc 0.25 0.004 0.010 0.049 0.10 0.004 D 4.90 4.80 5.00 0.193 0.189 0.197 E 6.00 5.80 6.20 0.236 0.228 0.244 E1 3.90 3.80 4.00 0.154 0.150 0.157 e 1.27 – – 0.050 – – h 0.25 0.50 0.010 0.020 k 0° 8° 0° 8° L 0.40 1.27 0.016 0.050 L1 18/23 Max 1.04 0.041 Doc ID 9105 Rev 7 M41T0 Package mechanical information Figure 13. Carrier tape for SO8 package (150 mils body width) P0 E P2 D T A0 F TOP COVER TAPE W B0 P1 CENTER LINES OF CAVITY K0 USER DIRECTION OF FEED AM03073v1 Table 10. Carrier tape dimensions for SO8 package (150 mils body width) Package W D SO8 12.00 ±0.30 1.50 +0.10/ –0.00 E P0 P2 F 1.75 4.00 2.00 5.50 ±0.10 ±0.10 ±0.10 ±0.05 A0 B0 K0 P1 T 6.50 ±0.10 5.30 ±0.10 2.20 ±0.10 8.00 ±0.10 0.30 ±0.05 Doc ID 9105 Rev 7 Unit Bulk Qty mm 2500 19/23 Package mechanical information M41T0 Figure 14. Reel schematic T 40mm min. Access hole At slot location B D C N A G measured Tape slot In core for Full radius Tape start 2.5mm min.width At hub AM04928v1 Table 11. Reel dimensions for 12 mm carrier tape - SO8 package (150 mils body width) A B (max) (min) 330 mm (13-inch) 1.5 mm Note: 20/23 C 13 mm ± 0.2 mm D N (min) (min) 20.2 mm 60 mm G 12.4 mm + 2/–0 mm T (max) 18.4 mm The dimensions given in Table 11 incorporate tolerances that cover all variations on critical parameters. Doc ID 9105 Rev 7 M41T0 7 Part numbering Part numbering Table 12. Ordering information scheme Example: M41T 0 M 6 F Device type M41T Supply voltage and write protect voltage 0: VCC = 2.0 to 5.5 V Package M = SO8 (150 mils width) Temperature range 6 = –40 to 85 °C Shipping method E = ECOPACK® package, tubes F = ECOPACK® package , tape & reel For a list of additional options (e.g., speed, package) or for further information on any aspect of this device, please contact the ST sales office nearest to you. Doc ID 9105 Rev 7 21/23 Revision history 8 M41T0 Revision history Table 13. 22/23 Document revision history Date Revision Changes Feb-2003 1.0 First issue 18-Feb-2003 1.1 Add Pb-free information (Table 4, Table 12); update package information (Features, Figure 12; Table 12) 01-Apr-2003 1.2 Fix package outline and data (Features, Figure 12, Table 12) 10-Apr-2003 1.3 Revert to previous package (Features, Figure 12, Table 12) 30-Oct-2003 1.4 Remove footnote (Table 4) 30-Jun-2004 2.0 Shipping method options updated and Note 1 removed from Table 12: Ordering information scheme. Datasheet put in new template. 23-Jul-2004 3.0 Content corrected from M41T80 to M41T0. 22-Aug-2006 4 Changed document to new template; amalgamated diagrams in Features; updated Package mechanical data in Section 6: Package mechanical information; Table 12 ecopack compliant; small text changes for entire document 04-Apr-2007 5 Updated packaging information that only SO8 package available (cover page and Table 12: Ordering information scheme). 13-May-2008 6 Updated Figure 12, Table 4. 09-Jun-2011 7 Updated Features, ECOPACK® text in Section 6: Package mechanical information; added Figure 13, 14, Table 10, 11. Doc ID 9105 Rev 7 M41T0 Please Read Carefully: 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. 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