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PDF M48Z35AY Data sheet ( Hoja de datos )
| Número de pieza | M48Z35AY | |
| Descripción | 256 Kbit 32Kb x8 ZEROPOWER SRAM | |
| Fabricantes | ST Microelectronics | |
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M48Z35AY
M48Z35AV
256 Kbit (32Kb x8) ZEROPOWER® SRAM
s INTEGRATED ULTRA LOW POWER SRAM,
POWER-FAIL CONTROL CIRCUIT and
BATTERY
s READ CYCLE TIME EQUALS WRITE CYCLE
TIME
s BATTERY LOW FLAG (BOK)
s AUTOMATIC POWER-FAIL CHIP DESELECT
and WRITE PROTECTION
s WRITE PROTECT VOLTAGES
(VPFD = Power-fail Deselect Voltage):
– M48Z35AY: 4.20V ≤ VPFD ≤ 4.50V
– M48Z35AV: 2.7V ≤ VPFD ≤ 3.0V
s SELF-CONTAINED BATTERY in the CAPHAT
DIP PACKAGE
s PACKAGING INCLUDES a 28-LEAD SOIC and
SNAPHAT® TOP
(to be Ordered Separately)
s SOIC PACKAGE PROVIDES DIRECT
CONNECTION for a SNAPHAT TOP which
CONTAINS the BATTERY and CRYSTAL
s PIN and FUNCTION COMPATIBLE with
JEDEC STANDARD 32K x8 SRAMs
DESCRIPTION
The M48Z35AY/35AV ZEROPOWER® RAM is a
32 Kbit x8 non-volatile static RAM that integrates
power-fail deselect circuitry and battery control
logic on a single die. The monolithic chip is avail-
able in two special packages to provide a highly in-
tegrated battery backed-up memory solution.
Table 1. Signal Names
A0-A14
Address Inputs
DQ0-DQ7
Data Inputs / Outputs
E Chip Enable
G Output Enable
W Write Enable
VCC Supply Voltage
VSS Ground
April 2000
SNAPHAT (SH)
Battery
28
1
SOH28 (MH)
28
1
PCDIP28 (PC)
Battery CAPHAT
Figure 1. Logic Diagram
VCC
15
A0-A14
8
DQ0-DQ7
W M48Z35AY
M48Z35AV
E
G
VSS
AI02781B
1/16
1 page  
M48Z35AY, M48Z35AV
Table 5. Capacitance (1, 2)
(TA = 25 °C)
Symbol
Parameter
CIN Input Capacitance
CIO (3) Input / Output Capacitance
Note: 1. Effective capacitance measured with power supply at 5V.
2. Sampled only, not 100% tested.
3. Outputs deselected.
Test Condition
VIN = 0V
VOUT = 0V
Min Max Unit
10 pF
10 pF
Table 6. DC Characteristics
(TA = 0 to 70 °C or –40 to 85 °C; VCC = 4.5V to 5.5V or 3.0v to 3.6V)
Symbol
Parameter
Test Condition
ILI (1)
Input Leakage Current
0V ≤ VIN ≤ VCC
ILO (1) Output Leakage Current
0V ≤ VOUT ≤ VCC
ICC Supply Current
Outputs open
ICC1
Supply Current (Standby) TTL
E = VIH
ICC2
Supply Current (Standby) CMOS
E = VCC – 0.2V
VIL (2) Input Low Voltage
VIH Input High Voltage
VOL Output Low Voltage
IOL = 2.1mA
VOH Output High Voltage
IOH = –1mA
Note: 1. Outputs deselected.
2. Negative spikes of –1V allowed for up to 10ns once per cycle.
Min
–0.3
2.2
2.4
Max
±1
±5
50
3
3
0.8
VCC + 0.3
0.4
Table 7. Power Down/Up Trip Points DC Characteristics (1)
(TA = 0 to 70 °C or –40 to 85 °C)
Symbol
Parameter
Min
VPFD Power-fail Deselect Voltage (M48Z35AY)
4.2
VPFD Power-fail Deselect Voltage (M48Z35AV)
2.7
VSO Battery Back-up Switchover Voltage (M48Z35AY)
VSO Battery Back-up Switchover Voltage (M48Z35AV)
tDR (2) Expected Data Retention Time
Note: 1. All voltages referenced to VSS.
2. At 25 °C.
10
Typ
4.35
2.9
3.0
VPFD – 100mV
Max
4.5
3.0
Unit
µA
µA
mA
mA
mA
V
V
V
V
Unit
V
V
V
V
YEARS
5/16
5 Page 
Table 11. Ordering Information Scheme
Example:
Supply Voltage and Write Protect Voltage
35AY = VCC = 4.5V to 5.5V; VPFD = 4.2V to 4.5V
35AV = VCC = 3.0V to 3.6V; VPFD = 2.7V to 3.0V
Speed
-70 = 70ns (M48Z35AY)
-100 = 100ns (M48Z35AV)
Package
PC = PCDIP28
MH (1) = SOH28
Temperature Range
1 = 0 to 70 °C
6 (2) = –40 to 85 °C
Shipping Method for SOIC
blank = Tubes
TR = Tape & Reel
M48Z35AY, M48Z35AV
M48Z35AY
-70 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. Industrial temperature grade available in SOIC package (SOH28) only.
Caution: Do not place the SNAPHAT battery package "M4Z28-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 STMicroelectronics Sales Office nearest to you.
Table 12. Revision History
Date
Revision Details
September 1999 First Issue
04/20/00
SH and SH28 packages for 2-pin and 2-socket removed
11/16
11 Page | ||
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| PDF Descargar | [ Datasheet M48Z35AY.PDF ] | |
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