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零件编号 | 93C46 | ||
描述 | AT93C46 | ||
制造商 | ATMEL Corporation | ||
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1 Page
1. Features
• Medium-voltage and Standard-voltage Operation
– 2.7 (VCC = 2.7V to 5.5V)
• User-selectable Internal Organization
– 1K: 128 x 8 or 64 x 16
• Three-wire Serial Interface
• 2 MHz Clock Rate (5V)
• Self-timed Write Cycle (10 ms max)
• High Reliability
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
• 8-lead TSSOP and 8-lead JEDEC SOIC Packages
2. Description
The AT93C46 provides 1024 bits of serial electrically erasable programmable read
only memory (EEPROM) organized as 64 words of 16 bits each, when the ORG pin is
connected to VCC and 128 words of 8 bits each when it is tied to ground. The device
is optimized for use in many automotive applications where low power and low voltage
operations are essential. The AT93C46 is available in space-saving 8-lead TSSOP
and 8-lead JEDEC SOIC packages. The AT93C46 is enabled through the Chip Select
pin (CS), and accessed via a 3-wire serial interface consisting of Data Input (DI), Data
Output (DO), and Shift Clock (SK). Upon receiving a Read instruction at DI, the
address is decoded and the data is clocked out serially on the data output pin DO. The
WRITE cycle is completely self-timed and no separate erase cycle is required before
write. The Write cycle is only enabled when it is in the Erase/Write Enable state. When
CS is brought “high” following the initiation of a write cycle, the DO pin outputs the
Ready/Busy status.
Table 2-1.
Pin Name
CS
SK
DI
DO
GND
VCC
ORG
Pin Configuration
Function
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Power Supply
Internal Organization
8-lead SOIC
CS 1
SK 2
DI 3
DO 4
8 VCC
7 DC
6 ORG
5 GND
8-lead TSSOP
CS 1
SK 2
DI 3
DO 4
8 VCC
7 DC
6 ORG
5 GND
Three-wire
Automotive
Temperature
Serial
EEPROMs
1K (128 x 8 or 64 x 16)
AT93C46
Rev. 5125C–SEEPR–11/07
Figure 5-3. EWEN Timing
CS
tCS
SK
DI 1 0 0 1 1
Figure 5-4. EWDS Timing
CS
...
tCS
SK
DI 1 0 0 0 0 ...
Figure 5-5. WRITE Timing
CS
tCS
SK
DI 1 0 1 AN ... A0 DN ... D0
HIGH IMPEDANCE
DO
Figure 5-6. WRAL Timing(1)
CS
BUSY
tWP
READY
tCS
SK
DI 1 0 0 0 1
HIGH IMPEDANCE
DO
... DN ... D0
BUSY
READY
tWP
8 AT93C46
5125C–SEEPR–11/07
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页数 | 14 页 | ||
下载 | [ 93C46.PDF 数据手册 ] |
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