AK9844A Datasheet, PDF (13/17 Pages) Asahi Kasei Microsystems – 4Kbit EEPROM with 4ch 8bit D/A Converter

ASAHI KASEI
[AK9844A]
„ A.C. ELECTRICAL CHARACTERISTICS
1) EEPROM section
( 1.8V ≤ VCC ≤ 5.5V, GND=0V, -40°C ≤ Ta ≤ 85°C, unless otherwise specified )
Parameter
Symbol
Condition
Min. Typ. Max. Unit
SK Cycle Time
tSKP1 2.5V ≤ VCC ≤ 5.5V
500
ns
tSKP2 1.8V ≤ VCC < 2.5V
1.5
µs
SK Pulse Width
tSKW1 2.5V ≤ VCC ≤ 5.5V
250
ns
tSKW2 1.8V ≤ VCC < 2.5V
750
ns
SK High Pulse Width ^{tSKH1 4.0V ≤ VCC ≤ 5.5V}
250
ns
tSKH2 2.5V ≤ VCC < 4.0V
500
ns
(Note3) tSKH3 1.8V ≤ VCC < 2.5V
750
ns
CS Setup Time
tCSS
100
ns
CS Hold Time
tCSH1 READ, WREN, WRDS, 100
ns
PDEN, PDDS
tCSH2 WRITE
(Note4) 1000
ns
SK Setup Time
tSKS
100
ns
Data Setup Time
tDIS1 4.0V ≤ VCC ≤ 5.5V
100
ns
tDIS2 2.5V ≤ VCC < 4.0V
150
ns
tDIS3 1.8V ≤ VCC < 2.5V
200
ns
Data Hold Time
tDIH1 4.0V ≤ VCC ≤ 5.5V
100
ns
tDIH2 2.5V ≤ VCC < 4.0V
150
ns
tDIH3 1.8V ≤ VCC < 2.5V
200
ns
Data Output Delay
(READ)
tPD1
tPD2
4.0V ≤ VCC ≤ 5.5V
2.5V ≤ VCC < 4.0V
150 ns
250 ns
tPD3 2.2V ≤ VCC < 2.5V
300 ns
(Note5)
Data Output Delay
(RDY/BUSY) (Note5)
Selftimed
Programming Time
tPD4
tPD
tE/W1
tE/W2
1.8V ≤ VCC < 2.2V
2.5V ≤ VCC ≤ 5.5V
1.8V ≤ VCC < 2.5V
500 ns
1000 ns
7 ms
10 ms
Write Recovery Time tRC
100
ns
Min CS High Time
tCS
250
ns
DO High-Z Time
tOZ
500 ns
Note3: 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.
Note4: In case that the data of the DAC section is not changed and the output of the DAC
is changed, tCSH is min. 1µs. In case of the other WRITE instruction, tCSH is
min. 100ns.
Note5: CL=100pF
DAD05E-00
- 13 -
2005/03