Datasheet LTC4304 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery |
| 页数 / 页 | 16 / 3 — The. ELECTRICAL CHARACTERISTICS. denotes the specifi cations which apply … |
| 文件格式/大小 | PDF / 660 Kb |
| 文件语言 | 英语 |
The. ELECTRICAL CHARACTERISTICS. denotes the specifi cations which apply over the full operating
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LTC4304
The ELECTRICAL CHARACTERISTICS
●
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VCC = 2.7V to 5.5V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VHYS SDA, SCL, Logic Input Threshold Voltage (Note 6) 50 mV Hysteresis tPLH ENABLE Delay On-Off VCC = 3.3V 300 ns READY Delay Off-On (Note 6) 10 ns tPHL ENABLE Delay Off-On VCC = 3.3V ● 60 95 175 µs READY Delay On-Off (Note 6) 10 ns IOFF_READY Ready Off Leakage Current ● ±10 µA
Rise-Time Accelerators
IPULLUPAC Transient Boosted Pull-Up Current Positive Transition on SDA, SCL, VCC = 2.7V, 2 3.5 5.5 mA Slew Rate = 0.8V/µs (Note 5) tPDOFF ACC Delay, On/Off (Note 6) 5 ns VIH Input High Voltage Measured on ACC ● 0.9VCC V VIL Input Low Voltage Measured on ACC ● 0.1VCC V IIN ACC Input Current ACC Shorted to GND or VCC (Note 8) ● –100 100 µA
Bus Stuck Low Timeout
tTIMEOUT Bus Stuck Low Timer SDAOUT, SCLOUT = 0V ● 25 30 35 ms VOLFAULT FAULT Output Low Voltage IPULLUP = 3mA ● 0.4 V IOFF_FAULT VCC = 5.5V ● ±10 µA
Input-Output Connection
VOS Input-Output Offset Voltage 10k to VCC on SDA, SCL, ● 40 80 120 mV 2.7k to VCC on SDA, SCL ● 50 100 150 mV VCC = 3.3V, VSDA/SCL = 0.2V (Note 4) CIN Digital Input Capacitance (Note 6) 10 pF SDAIN, SDAOUT, SCLIN, SCLOUT VIL, MAX Input Logic Low Voltage ● 0.4 V ILEAK Input Leakage Current SDA, SCL, VCC = 5.5V ● ±5 µA VOL Output Low Voltage, Input = 0V SDA, SCL Pins, ISINK = 4mA, VCC = 2.7V ● 0 0.19 0.3 V
Timing Characteristics
fI2C, MAX I2C Maximum Operating Frequency (Note 6) 400 600 kHz tBUF Bus Free Time Between Stop and Start (Note 6) 1.3 µs Condition tHD, STA Hold Time After (Repeated) (Note 6) 100 ns Start Condition tSU, STA Repeated Start Condition Set-Up Time (Note 6) 0 ns tSU, STO Stop Condition Set-Up Time (Note 6) 0 ns tHD, DATI Data Hold Time Input (Note 6) 0 ns tSU, DAT Data Set-Up Time (Note 6) 100 ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings voltage than its input. The magnitude of this offset voltage as a function of may cause permanent damage to the device. Exposure to any Absolute the pull-up resistor and VCC voltage is shown in the Typical Performance Maximum Rating condition for extended periods may affect device Characteristics section. reliability and lifetime.
Note 5:
IPULLUPAC varies with temperature and VCC voltage, as shown in
Note 2:
All currents into pins are positive; all voltages are referenced to the Typical Performance Characteristics section. GND unless otherwise specifi ed.
Note 6:
Determined by design, not tested in production.
Note 3:
Pulsed less than 5µs.
Note 7:
ICC test performed with connection circuitry active.
Note 4:
The connection circuitry always regulates the output to a higher
Note 8:
When fl oating, the ACC pin can tolerate ±5µA of leakage. 4304fa 3
The ELECTRICAL CHARACTERISTICS
●
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VCC = 2.7V to 5.5V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VHYS SDA, SCL, Logic Input Threshold Voltage (Note 6) 50 mV Hysteresis tPLH ENABLE Delay On-Off VCC = 3.3V 300 ns READY Delay Off-On (Note 6) 10 ns tPHL ENABLE Delay Off-On VCC = 3.3V ● 60 95 175 µs READY Delay On-Off (Note 6) 10 ns IOFF_READY Ready Off Leakage Current ● ±10 µA
Rise-Time Accelerators
IPULLUPAC Transient Boosted Pull-Up Current Positive Transition on SDA, SCL, VCC = 2.7V, 2 3.5 5.5 mA Slew Rate = 0.8V/µs (Note 5) tPDOFF ACC Delay, On/Off (Note 6) 5 ns VIH Input High Voltage Measured on ACC ● 0.9VCC V VIL Input Low Voltage Measured on ACC ● 0.1VCC V IIN ACC Input Current ACC Shorted to GND or VCC (Note 8) ● –100 100 µA
Bus Stuck Low Timeout
tTIMEOUT Bus Stuck Low Timer SDAOUT, SCLOUT = 0V ● 25 30 35 ms VOLFAULT FAULT Output Low Voltage IPULLUP = 3mA ● 0.4 V IOFF_FAULT VCC = 5.5V ● ±10 µA
Input-Output Connection
VOS Input-Output Offset Voltage 10k to VCC on SDA, SCL, ● 40 80 120 mV 2.7k to VCC on SDA, SCL ● 50 100 150 mV VCC = 3.3V, VSDA/SCL = 0.2V (Note 4) CIN Digital Input Capacitance (Note 6) 10 pF SDAIN, SDAOUT, SCLIN, SCLOUT VIL, MAX Input Logic Low Voltage ● 0.4 V ILEAK Input Leakage Current SDA, SCL, VCC = 5.5V ● ±5 µA VOL Output Low Voltage, Input = 0V SDA, SCL Pins, ISINK = 4mA, VCC = 2.7V ● 0 0.19 0.3 V
Timing Characteristics
fI2C, MAX I2C Maximum Operating Frequency (Note 6) 400 600 kHz tBUF Bus Free Time Between Stop and Start (Note 6) 1.3 µs Condition tHD, STA Hold Time After (Repeated) (Note 6) 100 ns Start Condition tSU, STA Repeated Start Condition Set-Up Time (Note 6) 0 ns tSU, STO Stop Condition Set-Up Time (Note 6) 0 ns tHD, DATI Data Hold Time Input (Note 6) 0 ns tSU, DAT Data Set-Up Time (Note 6) 100 ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings voltage than its input. The magnitude of this offset voltage as a function of may cause permanent damage to the device. Exposure to any Absolute the pull-up resistor and VCC voltage is shown in the Typical Performance Maximum Rating condition for extended periods may affect device Characteristics section. reliability and lifetime.
Note 5:
IPULLUPAC varies with temperature and VCC voltage, as shown in
Note 2:
All currents into pins are positive; all voltages are referenced to the Typical Performance Characteristics section. GND unless otherwise specifi ed.
Note 6:
Determined by design, not tested in production.
Note 3:
Pulsed less than 5µs.
Note 7:
ICC test performed with connection circuitry active.
Note 4:
The connection circuitry always regulates the output to a higher
Note 8:
When fl oating, the ACC pin can tolerate ±5µA of leakage. 4304fa 3