Rainbow Electronics DS1220AB_AD - Manual (Page 8)

DS1220AB/AD
100495 8/10
9
7. If the CE high transition occurs prior to or simultaneously with the WE high transition, the output buffers re-
main in a high impedance state during this period.
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 DS1220AB and each DS1220AD 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 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
, t
DH1
are measured from WE going high.
13. t
WR2
, t
DH2
are measured from CE going high.
14. DS1220AB and DS1220AD modules are recognized by Underwriters Laboratory (U.L.  ) under file E99151.
DC TEST CONDITIONS
Outputs Open
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
DS1220 TTP– SSS – III
Operating Temperature Range
Blank: 0
° to 70 °
IND: –40 ° to +85 ° C
Access
100:
120:
150:
200: Speed
100 ns
120 ns
150 ns
200 ns
Package Type
Blank: 24–pin 600 mil DIP
V
CC
Tolerance
AB: +5%
AD: +10%