CAT25C64S-TE13 ON Semiconductor, CAT25C64S-TE13 Datasheet - Page 4

• Manufacturer Part Number: CAT25C64S-TE13
• Manufacturer: ON Semiconductor

Specifications of CAT25C64S-TE13

• Density: 64Kb
• Interface Type: Serial (SPI)
• Organization: 8Kx8
• Access Time (max): 250ns
• Frequency (max): 3MHz
• Write Protection: Yes
• Data Retention: 100Year
• Operating Supply Voltage (typ): 3.3/5V
• Package Type: SOIC
• Operating Temp Range: 0C to 70C
• Supply Current: 10mA
• Operating Supply Voltage (min): 2.5V
• Operating Supply Voltage (max): 6V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / Rohs Status: Not Compliant

FUNCTIONAL DESCRIPTION
The CAT25C32/64 supports the SPI bus data
transmission protocol. The synchronous Serial Peripheral
Interface (SPI) helps the CAT25C32/64 to interface
directly with many of today’s popular microcontrollers.
The CAT25C32/64 contains an 8-bit instruction register.
(The instruction set and the operation codes are detailed
in the instruction set table)
After the device is selected with CS going low, the first
byte will be received. The part is accessed via the SI pin,
with data being clocked in on the rising edge of SCK.
The first byte contains one of the six op-codes that define
the operation to be performed.
Figure 1. Sychronous Data Timing
INSTRUCTION SET
Power-Up Timing
Note:
(1) This parameter is tested initially and after a design or process change that affects the parameter.
(2) t
CAT25C32/64
Note: Dashed Line= mode (1, 1) — — — —
Doc. No. 1001, Rev. J
Instruction
WREN
WRDI
RDSR
WRSR
READ
WRITE
SCK
CS
SO
Symbol
PUR
SI
t
t
PUR
PUW
and t
V
V
V
V
V
V
IH
V
V IL
OH
OL
IL
IL
IH
IH
PUW
t
CSS
HI-Z
are the delays required from the time V
(1)(2)
Power-up to Read Operation
Power-up to Write Operation
t
SU
Opcode
0000 0110
0000 0100
0000 0101
0000 0001
0000 0011
0000 0010
VALID IN
Parameter
t
WH
t
H
CC
is stable until the specified operation can be initiated.
4
t
WL
PIN DESCRIPTION
SI: Serial Input
SI is the serial data input pin. This pin is used to input all
opcodes, byte addresses, and data to be written to the
25C32/64. Input data is latched on the rising edge of the
serial clock.
SO: Serial Output
SO is the serial data output pin. This pin is used to
transfer data out of the 25C32/64. During a read cycle,
data is shifted out on the falling edge of the serial clock.
SCK: Serial Clock
SCK is the serial clock pin. This pin is used to synchronize
t
V
t
t FI
RI
Operation
Enable Write Operations
Disable Write Operations
Read Status Register
Write Status Register
Read Data from Memory
Write Data to Memory
t
HO
Max.
1
1
t
Characteristics subject to change without notice
CSH
© 2005 by Catalyst Semiconductor, Inc.
t
DIS
HI-Z
Units
ms
ms
t
CS