CY14B256KA_12 Datasheet, PDF (23/27 Pages) Cypress Semiconductor – 256-Kbit (32 K × 8) nvSRAM with Real Time Clock

CY14B256KA
Truth Table For SRAM Operations
HSB must remain HIGH for SRAM operations.
Table 5. Truth Table
CE
WE
OE
H
X
X
L
H
L
L
H
H
L
L
X
Inputs/Outputs
High Z
Data out (DQ₀–DQ₇)
High Z
Data in (DQ₀–DQ₇)
Mode
Deselect/Power-down
Read
Output disabled
Write
Power
Standby
Active
Active
Active
Ordering Information
Speed
(ns)
Ordering Code
25 CY14B256KA-SP25XIT
CY14B256KA-SP25XI
45 CY14B256KA-SP45XIT
CY14B256KA-SP45XI
All the above parts are Pb-free.
Ordering Code Definitions
Package Diagram
Package Type
51-85061
48-pin SSOP
Operating Range
Industrial
CY 14 B 256 K A - SP 25 X I T
Die revision:
Blank - No Rev
A - 1^st Rev
Option:
T - Tape and Reel
Blank - Std.
Pb-free
Package:
SP - 48-pin SSOP
Voltage:
B - 3.0 V
Temperature:
I - Industrial (–40 °C to 85 °C)
Speed:
25 - 25 ns
45 - 45 ns
Data Bus:
K - × 8 + RTC
Density:
256 - 256 Kb
14 - nvSRAM
Cypress
Document Number: 001-55720 Rev. *G
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