DS1270AB データシートの表示（PDF） - Maxim Integrated

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DS1270AB

16M Nonvolatile SRAM

Maxim Integrated 

DS1270Y/AB

8. If WE is low or the WE low transition occurs prior to or simultaneously with the CE low transition,

the output buffers remain in a high-impedance state during this period.

9. Each DS1270 has a built-in switch that disconnects the lithium source until the user first applies VCC.

The expected tDR is defined as accumulative time in the absence of VCC starting from the time power

is first applied by the user. This parameter is assured by component selection, process control, and

design. It is not measured directly during production testing.

10. All AC and DC electrical characteristics are valid over the full operating temperature range. For

commercial products, this range is 0°C to 70°C. For industrial products (IND), this range is -40°C to

+85°C.

11. In a power-down condition the voltage on any pin may not exceed the voltage on VCC.

12. tWR1 and tDH1 are measured from WE going high.

13. tWR2 and tDH2 are measured from CE going high.

14. DS1270 modules are recognized by Underwriters Laboratory (U.L.) under file E99151.

DC TEST CONDITIONS

Outputs Open

Cycle = 200ns for operating current

All voltages are referenced to ground

AC TEST CONDITIONS

Output Load: 100 pF + 1TTL Gate

Input Pulse Levels: 0.0 to 3.0 volts

Timing Measurement Reference Levels

Input: 1.5V

Output: 1.5V

Input pulse Rise and Fall Times: 5 ns

ORDERING INFORMATION

DS1270 TTP - SSS - III

Operating Temperature Range

blank: 0° to 70°

IND: -40° to +85°C

Access Speed

70: 70 ns

100: 100 ns

Package Type

blank: 36-pin 600-mil DIP

VCC Tolerance

AB: ±5%

Y: ±10%

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