X25401 Datasheet, PDF (8/14 Pages) Xicor Inc. – SPI Serial AUTOSTORE™ NOVRAM

X25401
EQUIVALENT A.C. LOAD CIRCUIT
5V
919Ω
OUTPUT
497Ω
100pF
2051 FHD F03
A.C. CONDITIONS OF TEST
Input Pulse Levels
Input Rise and
Fall Times
Input and Output
Timing Levels
0V to 3V
10ns
1.5V
2051 PGM T07.1
A.C. CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified.)
Read and Write Cycle Limits
Symbol
F_SK(3)
t_SCKH
t_SCKL
t_DS
t_DH
t_PD1
t_PD
t_Z
t_CSS
t_CSH
t_CDS
POWER-UP TIMING
Parameter
SCK Frequency
SCK Positive Pulse Width
SCK Negative Pulse Width
Data Setup Time
Data Hold Time
SCK to Data Bit 0 Valid
SCK to Data Valid
Chip Select to Output High Z
Chip Select Setup
Chip Select Hold
Chip Deselect
Min.
400
400
400
80
800
350
800
Max.
1
375
375
1
Units
MHz
ns
ns
ns
ns
ns
ns
µs
ns
ns
ns
2051 PGM T08.1
Symbol
Parameter
Max.
Units
t_PUR(4)
Power-up to Read Operation
200
t_PUW(4)
Power-up to Write or Store Operation
5
µs
ms
2051 PGM T09
Notes: (3) SCK rise and fall times must be less than 50ns.
(4) t_PUR and t_PUW are the delays required from the time V_CC is stable until the specified operation can be initiated. These parameters
are periodically sampled and not 100% tested.
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