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MAXQ7667
16-Bit, RISC, Microcontroller-Based,
Ultrasonic Distance-Measuring System
_______________________________________________________________________________________
7
ELECTRICAL CHARACTERISTICS (continued)
(VDVDDIO = +5V, VAVDD = +3.3V; VDVDD = +2.5V, system clock (fSYSCLK) = 16MHz, burst frequency (fBURST) = bandpass frequency
(fBPF) = 50kHz, CREFBG = CREF = 1F in parallel with 0.01F, fADCCLK = 2MHz (SAR data rate = 125ksps), TA = TMIN to TMAX, unless
otherwise specified. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DIGITAL OUTPUTS (GPIO, UART, JTAG, SPI)
ISINK = 0.5mA, drive strength = low
0.4
Output Low Voltage
ISINK = 1.0mA, drive strength = high
0.4
V
ISOURCE = 0.5mA,
drive strength = low
VDVDDIO -
0.5
Output High Voltage
ISOURCE = 1.0mA,
drive strength = high
VDVDDIO -
0.5
V
Drive strength = low
880
Maximum Output
Impedance
Drive strength = high
450
Three-State Leakage
±0.01
±1
A
Three-State Capacitance
15
pF
BURST OUTPUT
Output Low Voltage
ISINK = 8mA
0.4
V
Output High Voltage
ISOURCE = 8mA
VDVDDIO -
0.5
V
Drive strength = low
90
Maximum Output
Impedance
Drive strength = high
45
Three-State Leakage
±0.01
±1
A
Three-State Capacitance
15
pF
Short-Circuit Current
Burst drive set to high
50
mA
RESET
Internal Pullup Resistance
Pulled up to DVDDIO
120
k
Output Low Voltage
ISINK = 0.5mA
0.4
V
Output High Voltage
No external load
VDVDDIO -
0.5
V
Input Low Voltage
When driven by external source
0.8
V
Input High Voltage
When driven by external source
VDVDDIO -
1
V
UART/LIN INTERFACE (UTX, URX)
Asynchronous mode
(system clock/32)
500
Synchronous mode (system clock/8)
2000
UART Baud Rates
LIN 2.0 compatibility (Note 3)
1
20
kbps
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