M48T35-70PC1 STMicroelectronics, M48T35-70PC1 Datasheet - Page 9

• Manufacturer Part Number: M48T35-70PC1
• Description: IC TIMEKPR NVRAM 256KBIT 5V 28DI
• Manufacturer: STMicroelectronics
• Series: Timekeeper®r
• Type: Clock/Calendar/NVSRAMr

Specifications of M48T35-70PC1

• Memory Size: 256K (32K x 8)
• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 4.75 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 28-DIP Module (600 mil), 28-EDIP
• Function: Clock/Calendar/NV Timekeeping RAM/Watchdog Timer/Battery Backup
• Rtc Memory Size: 32768 Byte
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.75 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Rtc Bus Interface: Parallel
• Bus Type: Parallel
• User Ram: 32KB
• Operating Supply Voltage (typ): 5V
• Package Type: PCDIP
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.75V
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Pin Count: 28
• Mounting: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2845-5

M48T35, M48T35Y
Figure 5.
Note:
Table 3.
1. Valid for ambient operating temperature: T
2. C
Symbol
t
t
t
t
GHQZ
GLQX
EHQZ
ELQX
noted).
t
t
t
t
t
GLQV
AXQX
AVQV
ELQV
AVAV
L
= 5 pF.
(2)
(2)
(2)
(2)
A0-A14
E
G
DQ0-DQ7
READ cycle time
Address valid to output valid
Chip enable low to output valid
Output enable low to output valid
Chip enable low to output transition
Output enable low to output transition
Chip enable high to output Hi-Z
Output enable high to output Hi-Z
Address transition to output transition
If the address inputs are changed while E and G remain active, output data will remain valid
for output data hold time (t
READ mode AC waveforms
WRITE enable (W) = high.
READ mode AC characteristics
Parameter
tAVQV
tELQX
A
tGLQX
= 0 to 70 or –40 to 85 °C; V
tELQV
AXQX
tGLQV
(1)
Doc ID 2611 Rev 9
) but will go indeterminate until the next address access.
VALID
tAVAV
CC
= 4.75 to 5.5 V or 4.5 to 5.5 V (except where
VALID
Min
70
10
5
5
M48T35/Y
tGHQZ
Max
70
35
25
70
25
Operation modes
tAXQX
tEHQZ
Unit
AI00925
ns
ns
ns
ns
ns
ns
ns
ns
ns
9/28