CY14B101K-SP35XIT Cypress Semiconductor Corp, CY14B101K-SP35XIT Datasheet - Page 6

• Manufacturer Part Number: CY14B101K-SP35XIT
• Description: IC NVSRAM 1MBIT 35NS 48SSOP
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY14B101K-SP35XIT

• Format - Memory: RAM
• Memory Type: NVSRAM (Non-Volatile SRAM)
• Memory Size: 1M (128K x 8)
• Speed: 35ns
• Interface: Parallel
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low Average Active Power
CMOS technology provides the CY14B101K the benefit of
drawing significantly less current when it is cycled at times longer
than 50 ns.
READ/WRITE Cycle Time. The worst case current consumption
is shown for commercial temperature range, V
chip enable at maximum frequency. Only standby current is
drawn when the chip is disabled.
The overall average current drawn by the CY14B101K depends
on the following items:
■
■
■
■
■
■
Figure 3. Current versus Cycle Time
Document Number: 001-06401 Rev. *J
The duty cycle of chip enable
The overall cycle rate for accesses
The ratio of READs to WRITEs
The operating temperature
The V
I/O loading
CC
level
Figure 3
shows the relationship between I
CC
= 3.6V, and
CC
and
Best Practices
nvSRAM products have been used effectively for over 15 years.
While ease-of-use is one of the product’s main system values,
experience gained working with hundreds of applications has
resulted in the following suggestions as best practices:
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■
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The nonvolatile cells in an nvSRAM are programmed on the
test floor during final test and quality assurance. Incoming
inspection routines at customer or contract manufacturer’s
sites sometimes reprograms these values. Final NV patterns
are typically repeating patterns of AA, 55, 00, FF, A5, or 5A.
The end product’s firmware should not assume that an NV array
is in a set programmed state. Routines that check memory
content values to determine first time system configuration and
cold or warm boot status, must always program a unique NV
pattern (for example, complex 4-byte pattern of 46 E6 49 53
hex or more random bytes) as part of the final system manufac-
turing test to ensure these system routines work consistently.
The OSCEN bit in the Calibration register at 0x1FFF8 should
be set to 1 to preserve battery life when the system is in storage
(see
The Vcap value specified in this data sheet includes a minimum
and a maximum value size. The best practice is to meet this
requirement and not exceed the maximum Vcap value because
the higher inrush currents may reduce the reliability of the
internal pass transistor. Customers who want to use a larger
Vcap value to make sure there is extra store charge should
discuss their Vcap size selection with Cypress.
Stopping and Starting the Oscillator
CY14B101K
on page 8).
Page 6 of 29
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