4 AT88SC12816C
5016KS–SMEM–08/09
2.4. Serial Data (SDA/IO)
The SDA pin is bidirectional for serial data transfer. This pin is open-drain driven and may be wired with any number of
other open drain or open collector devices. An external pull-up resistor should be connected between SDA and VCC.
The value of this resistor and the system capacitance loading the SDA bus will determine the rise time of SDA. This
rise time will determine the maximum frequency during read operations. Low value pull-up resistors will allow higher
frequency operations while drawing higher average power. SDA/IO information applies to both asynchronous and
synchronous protocols.
When the synchronous protocol is used, the SCL/CLK input is used to positive edge clock data into the device and
negative edge clock data out of the device.
3. *Absolute Maximum Ratings
Operating Temperature.............................−40°C to +85°C
Storage Temperature ............................−65°C to + 150°C
Voltage on Any Pin
with Respect to Ground .......................− 0.7 to VCC +0.7V
Maximum Operating Voltage.......................................6.0V
DC Output Current ..................................................5.0 mA
*NOTICE: Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent
damage to the device. This is a stress rating
only and functional operation of the device at
these or any other condition beyond those
indicated in the operational sections of this
specification is not implied. Exposure to
absolute maximum rating conditions for
extended periods of time may affect device
reliability.
Table 2. DC Characteristics
Applicable over recommended operating range from VCC = +2.7 to 5.5V, TAC = -40°C to +85°C (unless otherwise noted)
Symbol Parameter Test Condition Min Typ Max Units
VCC(2) Supply Voltage 2.7 5.5 V
ICC Supply Current (VCC = 5.5V) Async READ at 3.57MHz 5 mA
ICC Supply Current (VCC = 5.5V) Async WRITE at 3.57MHz 5 mA
ICC Supply Current (VCC = 5.5V) Synch READ at 1MHz 5 mA
ICC Supply Current (VCC = 5.5V) Synch WRITE at 1MHz 5 mA
ISB Standby Current (VCC = 5.5V) VIN = VCC or GND 1 mA
VIL(1) SDA/IO Input Low Threshold 0 VCC x 0.2 V
VIL(1) SCL/CLK Input Low Threshold 0 VCC x 0.2 V
VIL(1) RST Input Low Threshold 0 VCC x 0.2 V
VIH(1)(2) SDA/IO Input High Threshold VCC x 0.7 VCC V
VIH(1)(2) SCL/CLK Input High Threshold VCC x 0.7 VCC V
VIH(1)(2) RST Input High Threshold VCC x 0.7 VCC V
IIL SDA/IO Input Low Current 0 < VIL < VCC x 0.15 15 μA
IIL SCL/CLK Input Low Current 0 < VIL < VCC x 0.15 15 μA
IIL RST Input Low Current 0 < VIL < VCC x 0.15 50 μA
IIH SDA/IO Input High Current VCC x 0.7 < VIH < VCC 20
μA
IIH SCL/CLK Input High Current VCC x 0.7 < VIH < VCC 100
μA