NX25F011B
NX25F021B
NX25F041B
NexFlash Technologies, Inc.
31
PRELIMINARY NXSF016F-1201
12/12/01 ©
1
2
3
4
5
6
7
8
9
10
11
12
AC ELECTRICAL CHARACTERISTICS (Preliminary) (4)
Fast SPI
Standard SPI
(RCE =1)
(RCE = 0)
Symbol
Description
Min Typ Max
Min Typ Max
Unit
FREQ
Clock Frequency
Vcc = 5V
0
—
20
0
—
12
MHz
Vcc = 3V
0
—
20
0
—
10
MHz
tCYC
SCK Serial Clock Period (1)
Vcc = 5V
50
——
80
——
ns
Vcc = 3V
50
——
100 ——
ns
tWH
SCK Serial Clock High or Low Time
24
——
24
——
ns
tWL
tRI
SCK Serial Clock Rise or Fall Time (2)
——
5
——
5ns
tFI
tSU
Data Input Setup Time to SCLK
Vcc = 5V
14
——
14
——
ns
Vcc = 3V
25
——
25
——
ns
tIH
Data Input Hold Time from SCLK
0
——
0
——
ns
tOH
Data Output Hold Time from SCLK
0
——
0
——
ns
tV
Data Output Valid after SCLK (1,3)
Vcc = 5V
——
35
——
35
ns
Vcc = 3V
——
45
——
45
ns
tCSS
CS Setup Time to Command
100
——
100 ——
ns
tCSH
CS Hold Time after Command
100
——
100 ——
ns
tWP
Erase/Write Program Time
—
7.5
20
— 7.5
20
ms
(see Write to Sector Command)
tEO
Erase Only Time
—
24
—
24
ms
(see Erase Sector/Block Commands)
tWO
Write Only Time
—
5.5
16
— 5.5
16
ms
(see Write Only to Sector Command)
tXS
Transfer or Compare Sector
—
100 150
— 100 150
µs
(see Transfer/Compare All Command)
tHD
SCK Setup Time to
HOLD
10
——
10
——
ns
tCD
SCK Hold Time from
HOLD
30
——
30
——
ns
tCS
CS Deselect Time
160
——
160 ——
ns
tRB
READY / BUSY Valid Time
160
——
160 ——
ns
tDIS
Data Output Disable Time
——
60
——
60
ns
tHZ
Data Disable/Enable from
HOLD
——
60
——
60
ns
Notes:
1. To achieve maximum clock performance, the read clock edge will need to be set for rising edge operation in the configuration
register (RCE=1).
2. Test points are 10% and 90% points for rise/fall times. All others timings are measured at 50% point.
3. With 30 pF (16 MHz) load SO to GND.
4. See Preliminary Designation page 31
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