CY14E256LA-SZ45XI Cypress Semiconductor Corp, CY14E256LA-SZ45XI Datasheet - Page 11

• Manufacturer Part Number: CY14E256LA-SZ45XI
• Description: IC NVSRAM 256KBIT 45NS 32SOIC
• Manufacturer: Cypress Semiconductor Corp
• Type: NVSRAMr

Specifications of CY14E256LA-SZ45XI

• Format - Memory: RAM
• Memory Type: NVSRAM (Non-Volatile SRAM)
• Memory Size: 256K (32K x 8)
• Speed: 45ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Word Size: 8b
• Organization: 32Kx8
• Density: 256Kb
• Interface Type: Parallel
• Access Time (max): 45ns
• Operating Supply Voltage (typ): 5V
• Package Type: SOIC
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Operating Temp Range: -40C to 85C
• Pin Count: 32
• Mounting: Surface Mount
• Supply Current: 52mA
• Memory Configuration: 32K X 8
• Access Time: 45ns
• Supply Voltage Range: 4.5V To 5.5V
• Memory Case Style: SOIC
• No. Of Pins: 32
• Operating Temperature Range: -40°C To +85°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Document Number: 001-54952 Rev. *F
Note
17. WE must be HIGH during SRAM read cycles.
18. HSB must remain HIGH during READ and WRITE cycles.
19. If WE is low when CE goes low, the outputs remain in the high impedance state.
20. CE or WE must be > V
Data Output
Data Output
Data Input
Address
Address
Data Output
Data Input
CE
OE
Address
I
WE
CE
CC
WE
IH
CE
during address transitions.
High Impedance
Standby
Figure 5. SRAM Read Cycle #2: CE and OE Controlled
Figure 6. SRAM Write Cycle #1: WE Controlled
Figure 7. SRAM Write Cycle #2: CE Controlled
Previous Data
t
SA
t
PU
t
SA
t
LZCE
t
LZOE
t
Address Valid
AA
t
ACE
High Impedance
t
AW
t
Address Valid
PWE
t
t
t
SCE
HZWE
DOE
t
Address Valid
RC
t
Active
SCE
t
PWE
t
WC
Input Data Valid
t
WC
t
t
SD
High Impedance
SD
Input Data Valid
Output Data Valid
t
LZWE
[18, 19, 20]
[18, 19, 20]
t
HD
t
HD
t
HA
t
HA
[17, 18]
t
t
HZCE
HZOE
t
PD
CY14E256LA
Page 11 of 19
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