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DS1345Y/AB
9. Each DS1345 has a built-in switch that disconnects the lithium source until the user first applies V CC .
The expected t DR is defined as accumulative time in the absence of V CC 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 V CC .
12. t WR1 and t DH1 are measured from WE going high.
13. t WR2 and t DH2 are measured from CE going high.
14. RST and BW are open-drain outputs and cannot source current. External pullup resistors should be
connected to these pins for proper operation. Both pins will sink 10mA.
15. DS1345 modules are recognized by Underwriters Laboratories (UL) 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 – 3.0V
Timing Measurement Reference Levels
Input: 1.5V
Output: 1.5V
Input pulse Rise and Fall Times: 5ns
ORDERING INFORMATION
PART
DS1345ABP-70+
DS1345ABP-70IND+
DS1345YP-70+
DS1345YP-70IND+
TEMP RANGE
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
SUPPLY
TOLERANCE
5V ± 5%
5V ± 5%
5V ± 10%
5V ± 10%
PIN-PACKAGE
34 PCAP*
34 PCAP*
34 PCAP*
34 PCAP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*DS9034PC+ or DS9034PCI+ (PowerCap) required. Must be ordered separately.
PACKAGE INFORMATION
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages . Note
that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a
different suffix character, but the drawing pertains to the package regardless of RoHS status.
PACKAGE TYPE
34 PCAP
PACKAGE CODE
PC2+3
OUTLINE NO.
21-0246
LAND
PATTERN NO.
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