M48T35Y-70PC1 STMicroelectronics, M48T35Y-70PC1 Datasheet - Page 18

• Manufacturer Part Number: M48T35Y-70PC1
• Description: IC TIMEKPR NVRAM 256KBIT 5V 28DI
• Manufacturer: STMicroelectronics
• Series: Timekeeper®r
• Type: Clock/Calendar/NVSRAMr

Specifications of M48T35Y-70PC1

• Memory Size: 256K (32K x 8)
• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 4.5 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): 4.5 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Rtc Bus Interface: Parallel
• Capacitance, Input: 10 pF
• Capacitance, Load: 100 pF
• Capacitance, Output: 10 pF
• Current, Input, Leakage: ±1 μA
• Current, Leakage Input: ± 1 μA (Max.)
• Current, Operating: 30 mA
• Current, Output, Leakage: ±1
• Current, Supply: 30 mA (Max.)
• Data Retention: 10 yrs.
• Density: 256K
• Frequency, Crystal: 32768
• Memory Type: SRAM
• Organization: 32K×8
• Package Type: PDIP28
• Power Dissipation: 1 W
• Temperature, Operating: 0 to +70 °C
• Temperature, Operating, Maximum: +70 °C
• Temperature, Operating, Minimum: 0 °C
• Time, Access: 70 ns
• Time, Fall: ≤5 ns
• Time, Read Cycle: 70 ns
• Time, Rise: ≤5 ns
• Time, Write Cycle: 70 ns
• Voltage, Input Range: -0.3 to 7 V
• Voltage, Input, High: 4.8 to 5.8 V
• Voltage, Input, Low: 0.8 V
• Voltage, Output, High: 2.4 V
• Voltage, Output, Low: 0.4 V
• Voltage, Supply: 4.5 to 5.5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2851-5

DC and AC parameters
5
Note:
18/28
DC and AC parameters
This section summarizes the operating and measurement conditions, as well as the DC and
AC characteristics of the device. The parameters in the following DC and AC characteristic
tables are derived from tests performed under the measurement conditions listed in the
relevant tables. Designers should check that the operating conditions in their projects match
the measurement conditions when using the quoted parameters.
Table 7.
Output Hi-Z is defined as the point where data is no longer driven.
Figure 11. AC measurement load circuit
Table 8.
1. Effective capacitance measured with power supply at 5 V; sampled only, not 100% tested.
2. At 25 °C, f = 1 MHz.
3. Outputs deselected.
Supply voltage (V
Ambient operating temperature (T
Load capacitance (C
Input rise and fall times
Input pulse voltages
Input and output timing ref. voltages
Symbol
C
OUT
C
IN
(3)
Operating and AC measurement conditions
Capacitance
Parameter
CC
C L includes JIG capacitance
)
DEVICE
L
UNDER
Output capacitance
TEST
)
Input capacitance
Parameter
1kΩ
Doc ID 2611 Rev 9
A
(1)(2)
)
5V
4.75 to 5.5
M48T35
0 to 70
0 to 3
100
1.9kΩ
≤ 5
1.5
C L = 100pF or 5pF
Min
-
-
OUT
M48T35Y
4.5 to 5.5
–40 to 85
0 to 3
Max
100
≤ 5
1.5
10
10
M48T35, M48T35Y
Unit
pF
pF
Unit
°C
pF
ns
V
V
V
AI01030