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Cypress Semiconductor Electronic Components Datasheet



CY14B101K

1 Mbit (128K x 8) nvSRAM



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CY14B101K pdf
PRELIMINARY
CY14B101K
1 Mbit (128K x 8) nvSRAM With Real-Time Clock
Features
• Data integrity of Cypress nvSRAM combined with full
featured Real-Time Clock (RTC)
• Watchdog timer
• Clock alarm with programmable interrupts
• Capacitor or battery backup for RTC
www.DataSheet4U2.c5onms, 35 ns, and 45 ns access times
• “Hands-off” automatic STORE on power down with only a
small capacitor
STORE to QuantumTrap™ initiated by software, device pin,
or on power down
RECALL to SRAM initiated by software or on power up
• Infinite READ, WRITE, and RECALL cycles
• High reliability
— Endurance to 200,000 cycles
Data retention: 20 years @55°C
• 10 mA typical ICC at 200 ns cycle time
• Single 3V operation +20%, –10%
• Commercial and industrial temperature
• SSOP package (ROHS compliant)
Logic Block Diagram
Functional Description
The Cypress CY14B101K combines a 1 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 can be read and
written an 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
alarm or periodic seconds, minutes, hours, or days. There is
also a programmable watchdog timer for process control.
A5
A6
A7
A8
A9
A 12
A 13
A 14
A 15
A 16
DQ 0
DQ 1
DQ 2
DQ 3
DQ 4
DQ 5
DQ 6
DQ 7
QuantumTrap
1024 x 1024
STORE
STATIC RAM
ARRAY
1024 X 1024
RECALL
COLUMN IO
COLUMN DEC
A 0 A1 A 2 A 3 A 4 A 10 A 11
VCC
VCAP
POWER
CONTROL
STORE/
RECALL
CONTROL
VRTCbat
VRTCcap
HSB
SOFTWARE
DETECT
-A15 A0
RTC
MUX
x1
x2
INT
-A16 A0
OE
CE
WE
Cypress Semiconductor Corporation
Document #: 001-06401 Rev. *E
• 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Revised March 01, 2007
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CY14B101K pdf
PRELIMINARY
CY14B101K
Pin Configurations
www.DataSheet4U.com
VCAP
A16
A14
A12
A7
A6
A5
INT
A4
NC
NC
NC
VSS
NC
VRTCbat
DQ0
A3
A2
A1
A0
DQ1
DQ2
x1
x2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48-SSOP
Top View
(Not To Scale)
48 VCC
47 A15
46 HSB
45 WE
44 A13
43 A8
42 A9
41 NC
40 A11
39 NC
38 NC
37 NC
36 VSS
35 NC
34 VRTCcap
33 DQ6
32 OE
31 A10
30 CE
29 DQ7
28 DQ5
27 DQ4
26 DQ3
25 VCC
Pin Definitions
Pin Name IO Type
Description
A0 – A16
Input
Address inputs used to select one of the 131,072 bytes of the nvSRAM.
DQ0 – DQ7 Input Output Bidirectional data IO lines. Used as input or output lines depending on operation
NC No Connect No Connects. This pin is not connected to the die
WE
Input
Write Enable Input, active LOW. When selected LOW, enables data on the IO pins to be written
to the address location latched by the falling edge of CE.
CE
Input
Chip Enable Input, active LOW. When LOW, selects the chip. When HIGH, deselects the chip.
OE
Input
Output Enable, active LOW. The active low OE input enables the data output buffers during READ
cycles. Deasserting OE high causes the IO pins to tri-state.
X1
X2
VRTCcap
VRTCbat
INT
Output Crystal connection, drives crystal on start up.
Input
Crystal connection for 32.768 kHz crystal.
Power Supply Capacitor supplied backup RTC supply voltage. (Left unconnected if VRTCbat is used)
Power Supply Battery supplied backup RTC supply voltage. (Left unconnected if VRTCcap is used)
Output Interrupt Output. Program to respond to the clock alarm, the watchdog timer and the power monitor.
Programmable to either active HIGH (push/pull) or LOW (open drain).
VSS
VCC
HSB
VCAP
Ground Ground for the device. Must be connected to ground of the system.
Power Supply Power Supply inputs to the device.
Input Output Hardware Store Busy. When LOW this output indicates a Hardware Store is in progress. When
pulled low external to the chip it initiates a nonvolatile STORE operation. A weak internal pull up
resistor keeps this pin HIGH if not connected (connection optional).
Power Supply AutoStoreTM Capacitor. Supplies power to nvSRAM during power loss to store data from SRAM
to nonvolatile elements.
Document #: 001-06401 Rev. *E
Page 2 of 24
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Part Number CY14B101K
Description 1 Mbit (128K x 8) nvSRAM
Maker Cypress Semiconductor - Cypress Semiconductor
Total Page 24 Pages
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