AT93C46DN-SH-T Electrically Erasable Programmable Memory
Electronics Parts semiconductor chip electronic
Features
l Low-voltage Operation
̶ VCC = 1.8V to 5.5V
l User-selectable Internal Organization
̶ 1K: 128 x 8 or 64 x 16
l 3-wire Serial Interface
l 2MHz Clock Rate (5V)
l Self-timed Write Cycle (5ms Max)
l High Reliability
̶ Endurance: 1,000,000 Write Cycles
̶ Data Retention: 100 Years
l 8-lead JEDEC SOIC, 8-lead TSSOP, 8-pad UDFN, 8-lead PDIP, and
8-ball VFBGA Packages.
Description
The Atmel® AT93C46D provides 1,024 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 the ORG pin is tied to ground). The device is
optimized for use in many industrial and commercial applications
where low-power and low-voltage operations are essential. The
AT93C46D is available in space-saving 8-lead JEDEC SOIC,
8-lead TSSOP, 8-pad UDFN, 8-lead PDIP, and 8-ball VFBGA packages.
The AT93C46D 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 DO pin. The write cycle is completely
self-timed, and no separate erase cycle is required before Write.
The write cycle is only enabled when the part 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 of the part.
The AT93C46D operates from 1.8V to 5.5V.
Pin Configurations and Pinouts
Table 1-1. Pin Configurations
| Pin Name | Function |
| CS | Chip Select |
| SK | Serial Data Clock |
| DI | Serial Data Input |
| DO | Serial Data Output |
| GND | Ground |
| VCC | Power Supply |
| ORG | Internal Organization |
| NC | No Connect |
Memory Organization
Table1. Pin Capacitance(1)
Applicable over recommended operating range from TA = 25°C, f =
1.0MHz, VCC = 1.8V (unless otherwise noted).
| Symbol | Test Conditions | Max | Units | Conditions |
| COUT | Output Capacitance (DO) | 5 | pF | VOUT = 0V |
| CIN | Input Capacitance (CS, SK, DI) | 5 | pF | VIN = 0V |
Note: 1. This parameter is characterized, and is not 100% tested.
1.1 DC Characteristics
Table 2. DC Characteristics
Applicable over recommended operating range from TAI = -40°C to
+85°C, VCC = 1.8V to 5.5V (unless otherwise noted).
| Symbol | Parameter | Test Condition | Min | Typ | Max | Unit |
| VCC1 | Supply Voltage | | 1.8 | | 5.5 | V |
| VCC2 | Supply Voltage | | 2.7 | | 5.5 | V |
| VCC3 | Supply Voltage | | 4.5 | | 5.5 | V |
ICC |
Supply Current |
VCC = 5.0V | Read at 1.0MHz | | 0.5 | 2.0 | mA |
| | | Write at 1.0MHz | | 0.5 | 2.0 | mA |
| ISB1 | Standby Current | VCC = 1.8V | CS = 0V | | 0.4 | 1.0 | μA |
| ISB2 | Standby Current | VCC = 2.7V | CS = 0V | | 6.0 | 10.0 | μA |
| ISB3 | Standby Current | VCC = 5.0V | CS = 0V | | 10.0 | 15.0 | μA |
| IIL | Input Leakage | VIN = 0V to VCC | | 0.1 | 1.0 | μA |
| IOL | Output Leakage | VIN = 0V to VCC | | 0.1 | 1.0 | μA |
(1) VIL1 | Input Low Voltage | 2.7V £ VCC £ 5.5V | -0.6 | | 0.8 | V |
(1) VIH1 | Input High Voltage | 2.7V £ VCC £ 5.5V | 2.0 | | VCC + 1 | V |
(1) VIL2 | Input Low Voltage | 1.8V £ VCC £ 2.7V | -0.6 | | VCC x 0.3 | V |
(1) VIH2 | Input High Voltage | 1.8V £ VCC £ 2.7V | VCC x 0.7 | | VCC + 1 | V |
| VOL1 | Output Low Voltage | 2.7V £ VCC £ 5.5V | IOL = 2.1mA | | | 0.4 | V |
| VOH1 | Output High Voltage | 2.7V £ VCC £ 5.5V | IOH = -0.4mA | 2.4 | | | V |
| VOL2 | Output Low Voltage | 1.8V £ VCC £ 2.7V | IOL = 0.15mA | | | 0.2 | V |
| VOH2 | Output High Voltage | 1.8V £ VCC £ 2.7V | IOH = -100μA | VCC - 0.2 | | | V |
Note: 1. VIL min and VIH max are reference only, and are not
tested.
