AK6420A Datasheet, PDF (11/15 Pages) Asahi Kasei Microsystems – 2K / 4K / 8Kbit Serial CMOS EEPROM

ASAHI KASEI
[AK6420B/40B/80B]
(2) A.C. ELECTRICAL CHARACTERISTICS
( 1.8V≤Vcc≤5.5V, -40°C≤Ta≤85°C, unless otherwise specified )
Parameter
Symbol
Condition
Min.
Max.
Unit
SK Cycle Time
tSKP1 2.5V≤VCC≤5.5V
500
ns
tSKP2 1.8V≤VCC<2.5V
1.5
us
SK Pulse Width
tSKW1 2.5V≤VCC≤5.5V
250
ns
tSKW2 1.8V≤VCC<2.5V
750
ns
SK High Pulse Width tSKH1 4.5V≤VCC≤5.5V
250
ns
tSKH2 2.5V≤VCC<4.5V
500
ns
*3 tSKH3 1.8V≤VCC<2.5V
750
ns
CS Setup Time
tCSS
100
ns
CS Hold Time
tCSH
100
ns
SK Setup Time
tSKSH
100
ns
/tSKSL
RESET Setup Time
tRESS
0
ns
Data Setup Time
tDIS1 4.5V≤VCC≤5.5V
100
ns
tDIS2 1.8V≤VCC<4.5V
200
ns
Data Hold Time
tDIH1 4.5V≤VCC≤5.5V
100
ns
tDIH2 1.8V≤VCC<4.5V
200
ns
DO pin
tPD1 4.5V≤VCC≤5.5V, *4
150
ns
Output delay
tPD2 2.5V≤VCC<4.5V, *4
300
ns
tPD3 1.8V≤VCC<2.5V. *4
500
ns
Selftimed Programming tE/W
10
ms
Time
Min CS High Time
tCS
250
ns
DO High-Z Time
tOZ
500
ns
*3: tSKH is the high pulse width of 16th SK pulse in READ operation. When the data in the
next address are read sequentially by continuing to provide clock, tSKH are applied to
the high pulse width of 32nd and 48th (multiple of 16) SK pulse in READ operation.
*4: CL=100pF
DAS03E-00
- 11 -
1999/05