Datasheet

7Maxim Integrated
16-Bit Microcontrollers with
Infrared Module and Optional USB
MAXQ612/MAXQ622
RECOMMENDED OPERATING CONDITIONS (continued)
(V
DD
= V
RST
to 3.6V, T
A
= 0NC to +70NC.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Single-Ended Receiver
Threshold
V
SE
0.8 2.0 V
Single-Ended Receiver
Hysteresis
V
SEH
200 mV
Differential Output Signal
Cross-Point Voltage
V
CRS
C
L
= 50pF (Note 6) 1.3 2.0 V
DP, DM Off-State Input
Impedance
R
LZ
300
kW
Driver Output Impedance R
DRV
Steady-state drive 28 44
W
DP Pullup Resistor R
PU
Idle 0.9 1.575
kW
Receiving 1.425 3.090
USB TIMING
DP, DM Rise Time (Transmit) t
R
C
L
= 50pF 4 20 ns
DP, DM Fall Time (Transmit) t
F
C
L
= 50pF 4 20 ns
Rise/Fall Time Matching
(Transmit)
t
R
/t
F
C
L
= 50pF (Note 6) 90 110 %
IR
Carrier Frequency f
IR
f
CK
/2 Hz
SPI (Note 6)
SPI Master Operating
Frequency
1/t
MCK
f
CK
/2 MHz
SPI Slave Operating
Frequency
1/t
SCK
f
CK
/4 MHz
SPI I/O Rise/Fall Time t
SPI_RF
C
L
= 15pF, pullup = 560W
8 24 ns
SCLK_ Output Pulse-Width
High/Low
t
MCH
, t
MCL
t
MCK
/2 -
t
SPI_RF
ns
MOSI_ Output Hold Time After
SCLK_ Sample Edge
t
MOH
t
MCK
/2 -
t
SPI_RF
ns
MOSI_ Output Valid to Sample
Edge
t
MOV
t
MCK
/2 -
t
SPI_RF
ns
MISO_ Input Valid to SCLK_
Sample Edge Rise/Fall Setup
t
MIS
25 ns
MISO_ Input to SCLK_ Sample
Edge Rise/Fall Hold
t
MIH
0 ns
SCLK_ Inactive to MOSI_
Inactive
t
MLH
t
MCK
/2 -
t
SPI_RF
ns
SCLK_ Input Pulse-Width
High/Low
t
SCH
, t
SCL
t
SCK
/2 ns
SSEL_ Active to First Shift
Edge
t
SSE
t
SPI_RF
ns