Rainbow Electronics DS1258Y_AB User Manual
Page 8
DS1258Y/AB
100395 8/9
4. t
DS
is measured from the earlier of CEU or CEL or WE going high.
5. These parameters are sampled with a 5 pF load and are not 100% tested.
6. If the CEU or CEL low transition occurs simultaneously with or later than the WE low transition in the output
buffers remain in a high impedance state during this period.
7. If the CEU or CEL high transition occurs prior to or simultaneously with the WE high transition, the output
buffers remain in high impedance state during this period.
8. If WE is low or the WE low transition occurs prior to or simultaneously with the CEU or CEL low transition, the
output buffers remain in a high impedance state during this period.
9. Each DS1258 has a built-in switch that disconnects the lithium source until V
CC
is first applied by the user.
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.
10. All AC and DC electrical characteristics are valid over the full operating temperature range. For standard
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
, t
DH1
are measured from WE going high.
13. t
WR2
, t
DH2
are measured from CEU OR CEL going high.
DC TEST CONDITIONS
Outputs Open
Cycle = 200 ns
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
DS1250 TTP– SSS – III
Operating Temperature Range
blank: 0
°
to 70
°
IND: –40
°
to +85
°
C
Access
70:
100:
Speed
70 ns
100 ns
Package Type
blank: 40–pin 600 mil DIP
V
CC
Tolerance
AB:
±
5%
Y:
±
10%