AT17C/LV65/128/256
8
Notes: 1. Preliminary specifications for military operating range only.
2. AC test load = 50 pF.
3. Float delays are measured with 5 pF AC loads. Transition is measured ±200 mV from steady state active levels.
AC Characteristics for AT17C65/128
V
CC
= 5V ± 5% Commercial/V
CC
= 5V ± 10% Ind./Mil.
Symbol Description
Commercial Industrial/Military
(1)
UnitsMin Max Min Max
T
OE
(2)
OE to Data Delay 30 35 ns
T
CE
(2)
CE to Data Delay 50 50 ns
T
CAC
(2)
CLK to Data Delay 50 55 ns
T
OH
Data Hold from CE, OE, or CLK 0 0 ns
T
DF
(3)
CE or OE to Data Float Delay 50 50 ns
T
LC
CLK Low Time 30 35 ns
T
HC
CLK High Time 30 35 ns
T
SCE
CE Setup Time to CLK (to guarantee proper counting) 45 50 ns
T
HCE
CE Hold Time from CLK (to guarantee proper counting) 0 0 ns
T
HOE
OE High Time (guarantees counter is reset) 25 25 ns
F
MAX
MAX Input Clock Frequency 12.5 12.5 MHz
AC Characteristics for AT17C128 When Cascading
V
CC
= 5V± 5% Commercial/V
CC
= 5V ± 10% Ind./Mil.
Symbol Description
Commercial Industrial/Military
(1)
UnitsMin Max Min Max
T
CDF
(3)
CLK to Data Float Delay 50 50 ns
T
OCK
(2)
CLK to CEO Delay 55 60 ns
T
OCE
(2)
CE to CEO Delay 55 60 ns
T
OOE
(2)
RESET/OE to CEO Delay 40 45 ns
F
MAX
MAX Input Clock Frequency 8 8 MHz
