5V or 3V NVRAM Supervisor

www.DataSheet4U.com M40Z300 M40Z300W 5V or 3V NVRAM Supervisor for Up to 8 LPSRAMs FEATURES SUMMARY ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ CONVERTS LOW POWER SRAM INTO NVRAMs PRECISION POWER MONITORING AND POWER SWITCHING CIRCUITRY AUTOMATIC WRITE-PROTECTION WHEN VCC IS OUT-OF-TOLERANCE TWO-INPUT DECODER ALLOWS CONTROL FOR UP TO 8 SRAMs (with 2 devices active in parallel) CHOICE OF SUPPLY VOLTAGES AND POWER-FAIL DESELECT VOLTAGES: – M40Z300: VCC = 4.5V to 5.5V THS = VSS: 4.5V ≤ VPFD ≤ 4.75V THS = VOUT: 4.2V ≤ VPFD ≤ 4.5V – M40Z300W: VCC = 3.0V to 3.6V THS = VSS: 2.8V ≤ VPFD ≤ 3.0V VCC = 2.7V to 3.3V THS = VOUT: 2.5 ≤ VPFD ≤ 2.7V RESET OUTPUT (RST) FOR POWER ON RESET BATTERY LOW PIN (BL) LESS THAN 12ns CHIP ENABLE ACCESS PROPAGATION DELAY (for 5.0V device) PACKAGING INCLUDES A 28-LEAD SOIC AND SNAPHAT® TOP (to be ordered separately), OR A 16-LEAD SOIC SOIC PACKAGE PROVIDES DIRECT CONNECTION FOR A SNAPHAT TOP WHICH CONTAINS THE BATTERY Figure 1. 16-pin SOIC Package 16 1 SO16 (MQ) Figure 2. 28-pin SOIC Package SNAPHAT (SH) Crystal/Battery 28 1 SOH28 (MH) February 2005 1/21 M40Z300, M40Z300W TABLE OF CONTENTS FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 1. 16-pin SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2. 28-pin SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 3. Table 1. Figure 4. Figure 5. Figure 6. Figure 7. Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-pin SOIC Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M40Z300 16-pin SOIC Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M40Z300W 16-pin SOIC Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hardware Hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .....4 .....4 .....5 .....5 .....5 .....6 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Two to Four Decode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 2. Truth Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 8. Address-Decode Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Data Retention Lifetime Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Power-on Reset Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Battery Low Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 VCC Noise And Negative Going Transients. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 9. Supply Voltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 3. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 DC AND AC PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 4. DC and AC Measurement Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 10.AC Testing Load Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 5. Capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 6. DC Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 11.Power Down Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 12.Power Up Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 7. Power Down/Up Mode AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 PACKAGE MECHANICAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 13.SOH28 – 28-lead Plastic Small Outline, 4-socket battery SNAPHAT, Package Outline. 15 Table 8. SOH28 – 28-lead Plastic Small Outline, battery SNAPHAT, Package Mechanical Data 15 Figure 14.SH – 4-pin SNAPHAT Housing for 48mAh Battery, Package Outline . . . . . . . . . . . . . . . 16 Table 9. SH – 4-pin SNAPHAT Housing for 48mAh Battery, Package Mechanical Data . . . . . . . 16 Figure 15.SH – 4-pin SNAPHAT Housing for 120mAh Battery, Package Outline . . . . . . . . . . . . . . 17 Table 10. SH – 4-pin SNAPHAT Housing for 120mAh Battery, Package Mechanical Data . . . . . . 17 Figure 16.SO16 – 16-lead Plastic Small Outline, 150 mils body width, Package Outline . . . . . . . . 18 Table 11. SO16 – 16-lead Plastic Small Outline, 150 mils body width, Package Mechanical Data 18 2/21 M40Z300, M40Z300W PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Table 12. Ordering Information Example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Table 13. SNAPHAT® Battery Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 REVISION HISTORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table 14. Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 3/21 M40Z300, M40Z300W DESCRIPTION The M40Z300/W NVRAM SUPERVISOR is a selfcontained device which converts a standard lowpower SRAM into a non-volatile memory. A precision voltage reference and comparator monitors the VCC input for an out-of-tolerance condition. When an invalid VCC condition occurs, the conditioned chip enable outputs (E1CON to E4CON) are forced inactive to write-protect the stored data in the SRAM. During a power failure, the SRAM is switched from the VCC pin to the lithium cell within the SNAPHAT® to provide the energy required for data retention. On a subsequent power-up, the SRAM remains write protected until a valid power condition returns. The 28-pin, 330mil SOIC provides sockets with gold plated contacts for direct connection to a separate SNAPHAT housing containing the battery. The SNAPHAT housing has gold plated pins which mate with the sockets, ensuring reliable connection. The housing is keyed to prevent improper insertion. This unique design allows the SNAPHAT battery package to be mounted on top of the SOIC package after the completion of the surface mount process which greatly reduces the board manufacturing process complexity of either directly soldering or inserting a battery into a soldered holder. Providing non-volatility becomes a “SNAP.” The 16-pin SOIC provides battery pins for an external user-supplied battery. Insertion of the SNAPHAT housing after reflow prevents potential battery damage due to the high temperatures required for device surface-mounting. The SNAPHAT housing is also keyed to prevent reverse insertion. The 28-pin SOIC and battery packages are shipped separately in plastic anti-static tubes or in Tape & Reel form. For the 28-lead SOIC, the battery/crystal package (e.g., SNAPHAT) part number is “M4ZXX-BR00SH” (see Table 13., page 19). Caution: Do not place the SNAPHAT battery top in conductive foam, as this will drain the lithium button-cell battery. Figure 3. Logic Diagram VCC B +(1) Table 1. Signal Names THS E Threshold Select Input Chip Enable Input Conditioned Chip Enable Output Decoder Inputs Reset Output (Open Drain) Battery Low Output (Open Drain) Supply Voltage Output Supply Voltage Ground Positive Battery Pin Negative Battery Pin Not Connected Internally THS E B A M40Z300 M40Z300W VOUT BL E1CON E2CON E3CON E4CON RST E1CON - E4CON A, B RST BL VOUT VCC VSS B+ VSS B –(1) AI02242 B– NC Note: 1. For 16-pin SOIC package only. Note: For M40Z300W, B– must be connected to the negative battery terminal only (not to Pin 8, VSS). 4/21 M40Z300, M40Z300W Figure 4. 28-pin SOIC Connections VOUT NC NC RST NC A NC B NC BL NC NC THS VSS 28 1 2 27 3 26 4 25 5 24 6 23 7 M40Z300 22 8 M40Z300W 21 9 20 10 19 11 18 12 17 13 16 14 15 AI02243 Figure 6. M40Z300W 16-pin SOIC Connections VCC E NC NC NC E1CON E2CON NC E3CON NC NC NC E4CON NC VOUT NC RST A B BL THS VSS 16 1 2 15 3 14 4 13 M40Z300W 5 12 6 11 7 10 8 9 VCC B– E E1CON E2CON E3CON E4CON B+ AI06350 Figure 5. M40Z300 16-pin SOIC Connections Note: For M40Z300W, B– must be connected to the negative battery terminal only (not to Pin 8, VSS). VOUT NC RST A B BL THS VSS 1 2 3 4 5 6 7 8 16 15 14 13 M40Z300 12 11 10 9 VCC B+ E E1CON E2CON E3CON E4CON B– AI03624 5/21 M40Z300, M40Z3