M48T58 M48T58Y 28-LEAD PCDIP28 SOH28 M48T58/58Y A0-A12 AI01374B B48T58/801

M48T58Y 64Kb (8K x 8) TIMEKEEPER® SRAM DATA BRIEFING INTEGRATED ULTRA LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL

M48T58 M48T58 M48T58Y M48T58Y 64Kb (8K x 8) TIMEKEEPER® SRAM DATA BRIEFING INTEGRATED ULTRA LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT and BATTERY BYTEWIDETM RAM-LIKE CLOCK ACCESS BCD CODED YEAR, MONTH, DAY, DATE, HOURS, MINUTES and SECONDS FREQUENCY TEST OUTPUT for REAL TIME CLOCK AUTOMATIC POWER-FAIL CHIP DESELECT and WRITE PROTECTION WRITE PROTECT VOLTAGES (VPFD = Power-fail Deselect Voltage): M48T58 M48T58: 4.5V VPFD 4.75V M48T58Y M48T58Y: 4.2V VPFD 4.5V SELF-CONTAINED BATTERY and CRYSTAL in the CAPHAT DIP PACKAGE PACKAGING INCLUDES a 28-LEAD 28-LEAD SOIC and SNAPHAT® TOP (to be Ordered Separately) SOIC PACKAGE PROVIDES DIRECT CONNECTION for a SNAPHAT TOP which CONTAINS the BATTERY and CRYSTAL PIN and FUNCTION COMPATIBLE with JEDEC STANDARD 8K x 8 SRAMs SNAPHAT (SH) Battery/Crystal 28 28 1 1 PCDIP28 PCDIP28 (PC) Battery/Crystal CAPHAT SOH28 SOH28 (MH) Logic Diagram VCC DESCRIPTION The M48T58/58Y M48T58/58Y TIMEKEEPER® RAM is an 8K x 8 non-volatile static RAM and real time clock. The monolithic chip is available in two special packages to provide a highly integrated battery backed-up memory and real time clock solution. The M48T58/58Y M48T58/58Y is a non-volatile pin and function equivalent to any JEDEC standard 8K x 8 SRAM. It also easily fits into many ROM, EPROM, and EEPROM sockets, providing the non-volatility of PROMs without any requirement for special write timing or limitations on the number of writes that can be performed. The 28 pin 600mil DIP CAPHATTM houses the M48T58/58Y M48T58/58Y silicon with a quartz crystal and a long life lithium button cell in a single package. 13 8 A0-A12 A0-A12 DQ0-DQ7 W E1 M48T58 M48T58 M48T58Y M48T58Y FT E2 G VSS AI01374B AI01374B B48T58/801 B48T58/801 Complete data available on DATA-on-DISC CD-ROM or at www.st.com 1/2 M48T58 M48T58, M48T58Y M48T58Y DIP Pin Connections Signal Names A0-A12 A0-A12 DQ0-DQ7 FT A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 VSS 28 1 27 2 26 3 25 4 24 5 23 6 7 M48T58 M48T58 22 8 M48T58Y M48T58Y 21 20 9 19 10 18 11 17 12 13 16 14 15 VCC W E2 A8 A9 A11 G A10 E1 DQ7 DQ6 DQ5 DQ4 DQ3 AI01375B AI01375B Address Inputs Data Inputs / Outputs FT Frequency Test Output (Open Drain) E1 Chip Enable 1 E2 Chip Enable 2 G Output Enable W Write Enable VCC Supply Voltage VSS Ground Ordering Information Scheme For a list of available options or for further information on any aspect of this device, please contact the SGS-THOMSON Sales Office nearest to you. Example: -70 MH 1 TR Supply Voltage and Write Protect Voltage SOIC Pin Connections 58 (1) VCC = 4.75V to 5.5V VPFD = 4.5V to 4.75V 58Y FT A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 VSS M48T58Y M48T58Y 1 28 27 2 26 3 25 4 24 5 23 6 22 7 M48T58Y M48T58Y 21 8 20 9 19 10 18 11 17 12 16 13 15 14 VCC W E2 A8 A9 A11 G A10 E1 DQ7 DQ6 DQ5 DQ4 DQ3 -70 VCC = 4.5V to 5.5V VPFD = 4.2V to 4.5V Speed 70ns Package PC MH (2) PCDIP28 PCDIP28 SOH28 SOH28 Temp. Range 1 0 to 70 °C Shipping Method for SOIC blank Tubes TR Tape & Reel AI01376B AI01376B Notes: 1. The M48T58 M48T58 part is offered with the PCDIP28 PCDIP28 (i.e. CAPHAT) package only. 2. The SOIC package (SOH28 SOH28) requires the battery/crystal package (SNAPHAT) which is ordered separately under the part number "M4T28-BR12SH1 M4T28-BR12SH1" in plastic tube or "M4T28-BR12SH1TR M4T28-BR12SH1TR" in Tape & Reel form. Caution: Do not place the SNAPHAT battery/crystal package "M4T28-BR12SH1 M4T28-BR12SH1" in conductive foam since this will drain the lithium button-cell battery. 2/2