|
|
PDF M40Z300WMH1TR Data sheet ( Hoja de datos )
| Número de pieza | M40Z300WMH1TR | |
| Descripción | NVRAM CONTROLLER for up to EIGHT LPSRAM | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de M40Z300WMH1TR (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
M40Z300
M40Z300W
NVRAM CONTROLLER for up to EIGHT LPSRAM
s CONVERT LOW POWER SRAMs into
NVRAMs
s PRECISION POWER MONITORING and
POWER SWITCHING CIRCUITRY
s AUTOMATIC WRITE-PROTECTION when VCC
is OUT-OF-TOLERANCE
s TWO INPUT DECODER ALLOWS CONTROL
for up to 8 SRAMs (with 2 devices active in
parallel)
s 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
s RESET OUTPUT (RST) for POWER ON
RESET
s LESS THAN 12ns CHIP ENABLE ACCESS
PROPAGATION DELAY (for 5.0V device)
s PACKAGING INCLUDES a 28-LEAD SOIC
and SNAPHAT® TOP, or a 16-LEAD SOIC
(to be Ordered Separately)
s SOIC PACKAGE PROVIDES DIRECT
CONNECTION for a SNAPHAT TOP which
CONTAINS the BATTERY
s BATTERY LOW PIN (BL)
DESCRIPTION
The M40Z300/W NVRAM Controller is a self-con-
tained device which converts a standard low-pow-
er SRAM into a non-volatile memory. A precision
voltage reference and comparator monitors the
VCC input for an out-of-tolerance condition.
SNAPHAT (SH)
Battery
28
1
SOH28 (MH)
16
1
SO16 (MQ)
Figure 1. Logic Diagram
VCC B+(1)
THS
E
B
A
M40Z300
M40Z300W
VOUT
BL
E1CON
E2CON
E3CON
E4CON
RST
VSS B–(1)
NOTE: 1. For 16-pin SOIC package only.
AI02242
March 2000
1/16
1 page  
Figure 4. Hardware Hookup
3.0V, 3.3V or 5V
M40Z300, M40Z300W
VCC VOUT
0.1µF
M40Z300
M40Z300W
A E1CON
E2CON
B
E3CON
E E4CON
VCC
0.1µF
CMOS
SRAM
E
VCC
0.1µF
CMOS
SRAM
E
Threshold THS
RST
To Microprocessor
VSS
BL
To Battery Monitor Circuit
VCC
0.1µF
CMOS
SRAM
E
VCC
0.1µF
CMOS
SRAM
E
AI02395
POWER-ON RESET OUTPUT
All microprocessors have a reset input which forc-
es them to a known state when starting. The
M40Z300/W has a reset output (RST) pin which is
guaranteed to be low within tWPT of VPFD (See Ta-
ble 7). This signal is an open drain configuration.
An appropriate pull-up resistor should be chosen
to control the rise time. This signal will be valid for
all voltage conditions, even when VCC equals VSS.
Once VCC exceeds the power failure detect volt-
age VPFD, an internal timer keeps RST low for
tREC to allow the power supply to stabilize.
TWO TO FOUR DECODE
The M40Z300/W includes a 2 input (A, B) decoder
which allows the control of up to 4 independent
SRAMs. The Truth Table for these inputs is shown
in Table 3.
5/16
5 Page 
Table 9. Ordering Information Scheme
Example:
Supply Voltage and Write Protect Voltage
300 = VCC = 4.5V to 5.5V
THS = VSS 4.5V ≤ VPFD ≤ 4.75V
THS = VOUT 4.2V ≤ VPFD ≤ 4.5V
300W = VCC = 3.0V to 3.6V
THS = VSS 2.8V ≤ VPFD ≤ 3.0V
VCC = 2.7V to 3.3V
THS = VOUT 2.5V ≤ VPFD ≤ 2.7V
Package
MH(1,2) = SOH28
MQ = SO16
Temperature Range
1 = 0 to 70 °C
Shipping Method for SOIC
blank = Tubes
TR = Tape & Reel
M40Z300W
M40Z300, M40Z300W
MH 1 TR
Note: 1. The SOIC package (SOH28) requires the battery package (SNAPHAT) which is ordered separately under the part number
“M4Zxx-BR00SH1" in plastic tube or "M4Zxx-BR00SH1TR" in Tape & Reel form.
2. Delivery may include either the 2-pin version of the SOIC/SNAPHAT or the 4-pin version of the SOIC/SNAPHAT. Both are function-
ally equivalent (see package drawing section for details).
Caution: Do not place the SNAPHAT battery package "M4Zxx-BR00SH1" in conductive foam since will drain the lithium button-cell battery.
For a list of available options (Speed, Package, etc...) or for further information on any aspect of this de-
vice, please contact the ST Sales Office nearest to you.
Table 10. Revision History
Date
March 1999
First Issue
03/08/00
Document Layout changed
SO16 package added
Battery Capacity changed (Table 8)
Revision Details
11/16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet M40Z300WMH1TR.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| M40Z300WMH1TR | NVRAM CONTROLLER for up to EIGHT LPSRAM | ST Microelectronics |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |