CY14B104KA 查看數據表（PDF） - Cypress Semiconductor
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CY14B104KA Datasheet PDF : 31 Pages
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PRELIMINARY
CY14B104KA, CY14B104MA
4 Mbit (512K x 8/256K x 16) nvSRAM with
Real-Time-Clock
Features
■ 20 ns, 25 ns, and 45 ns access times
■ Internally organized as 512K x 8 (CY14B104KA) or 256K x 16
(CY14B104MA)
■ Hands off automatic STORE on power down with only a small
capacitor
■ STORE to QuantumTrap® nonvolatile elements is initiated by
software, device pin, or AutoStore® on power down
■ RECALL to SRAM initiated by software or power up
■ High reliability
■ Infinite read, write, and recall cycles
■ 200,000 STORE cycles to QuantumTrap
■ 20 year data retention
■ Single 3V +20%, –10% operation
■ Data integrity of Cypress nvSRAM combined with full featured
Real-Time-Clock
■ Watchdog timer
■ Clock alarm with programmable interrupts
■ Capacitor or battery backup for RTC
■ Commercial and industrial temperatures
■ 44 and 54-pin TSOP II package
■ Pb-free and RoHS compliance
Functional Description
The Cypress CY14B104KA/CY14B104MA combines a 4-Mbit
nonvolatile static RAM with a full featured real-time-clock in a
monolithic integrated circuit. The embedded nonvolatile
elements incorporate QuantumTrap technology producing the
world’s most reliable nonvolatile memory. The SRAM is read and
written infinite number of times, while independent nonvolatile
data resides in the nonvolatile elements.
The real-time-clock function provides an accurate clock with leap
year tracking and a programmable, high accuracy oscillator. The
alarm function is programmable for one time alarms or periodic
seconds, minutes, hours, or days. There is also a programmable
watchdog timer for process control.
Logic Block Diagram[1, 2, 3]
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Notes
1. Address A0 - A18 for x8 configuration and Address A0 - A17 for x16 configuration.
2. Data DQ0 - DQ7 for x8 configuration and Data DQ0 - DQ15 for x16 configuration.
3. BHE and BLE are applicable for x16 configuration only.
Cypress Semiconductor Corporation • 198 Champion Court
Document #: 001-07103 Rev. *J
• San Jose, CA 95134-1709 • 408-943-2600
Revised November 3, 2008
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