Rainbow Electronics MAXQ7667 - Manual (Page 7)

MAXQ7667
16-Bit, RISC, Microcontroller-Based,
Ultrasonic Distance-Measuring System
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ELECTRICAL CHARACTERISTICS (continued)
(V DVDDIO = +5V, V AVDD = +3.3V; V DVDD = +2.5V, system clock (f SYSCLK ) = 16MHz, burst frequency (f BURST ) = bandpass frequency
(f BPF ) = 50kHz, C REFBG = C REF = 1µF in parallel with 0.01µF, f ADCCLK = 2MHz (SAR data rate = 125ksps), T A = T MIN to T MAX , unless
otherwise specified. Typical values are at T A = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL OUTPUTS (GPIO, UART, JTAG, SPI)
I SINK = 0.5mA, drive strength = low 0.4
Output Low Voltage
I SINK = 1.0mA, drive strength = high 0.4
V
I SOURCE = 0.5mA,
drive strength = low
V DVDDIO -
0.5
Output High Voltage
I SOURCE = 1.0mA,
drive strength = high
V DVDDIO -
0.5
V
Drive strength = low 880 Maximum Output
Impedance
Drive strength = high 450
Three-State Leakage ±0.01 ±1 µA
Three-State Capacitance 15 pF
BURST OUTPUT
Output Low Voltage I SINK = 8mA 0.4 V
Output High Voltage I SOURCE = 8mA
V DVDDIO -
0.5
V
Drive strength = low 90 Maximum Output
Impedance
Drive strength = high 45
Three-State Leakage ±0.01 ±1 µA
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 I SINK = 0.5mA 0.4 V
Output High Voltage No external load
V
DVDDIO
-
0.5
V
Input Low Voltage When driven by external source 0.8 V
Input High Voltage When driven by external source
V DVDDIO -
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