MAX3372E Datasheet, PDF (11/25 Pages) Maxim Integrated Products – ±15kV ESD-Protected, 1μA, 16Mbps, Dual/Quad Low-Voltage Level Translators in UCSP

±15kV ESD-Protected, 1µA, 16Mbps, Dual/Quad
Low-Voltage Level Translators in UCSP
circuitry limits the maximum data rate for devices in the
MAX3372E–MAX3379E, MAX3390E–MAX3393E family to
16Mbps. The maximum data rate also depends heavily
on the load capacitance (see Typical Operating
Characteristics), output impedance of the driver, and the
operational voltage range (see Timing Characteristics).
Speed-Up Circuitry
The MAX3373E–MAX3376E/MAX3378E/MAX3379E and
MAX3390E–MAX3393E feature a one-shot generator that
decreases the rise time of the output. When triggered,
MOSFETs PU1 and PU2 turn on for a short time to pull up
I/O V_{L_} and I/O V_{CC_} to their respective supplies (see
Figure 2b). This greatly reduces the rise time and propa-
gation delay for the low-to-high transition. The scope
photo of Rail-to-Rail Driving for 8Mbps Operation in the
Typical Operating Characteristics shows the speed-up
circuitry in operation.
Three-State Output Mode
Pull THREE-STATE low to place the MAX3372E–
MAX3379E and MAX3390E–MAX3393E in three-state out-
V_L
V_CC
put mode. Connect THREE-STATE to V_L (logic high) for
normal operation. Activating the three-state output mode
disconnects the internal 10kΩ pullup resistors on the I/O
V_CC and I/O V_L lines. This forces the I/O lines to a high-
impedance state, and decreases the supply current to
less than 1µA. The high-impedance I/O lines in three-
state output mode allow for use in a multidrop network.
When in three-state output mode, do not allow the voltage
at I/O V_{L_} to exceed (V_L + 0.3V), or the voltage at I/O
V_{CC_} to exceed (V_CC + 0.3V).
Thermal Short-Circuit Protection
Thermal overload detection protects the MAX3372E–
MAX3379E and MAX3390E–MAX3393E from short-circuit
fault conditions. In the event of a short-circuit fault, when
the junction temperature (T_J) reaches +152°C, a thermal
sensor signals the three-state output mode logic to force
the device into three-state output mode. When T_J has
cooled to +142°C, normal operation resumes.
V_L
V_CC
V_L V_CC
V_L V_CC
MAX3372E–MAX3379E
AND MAX3390E–MAX3393E
I/O V_{L_}
I/O V_{CC_}
DATA
GND
R_LOAD
C_LOAD
C_LOAD
DATA
MAX3373E–MAX3376E,
MAX3378E/MAX3379E
AND MAX3390E–MAX3393E
I/O V_{L_}
I/O V_{CC_}
R_LOAD
GND
I/O V_{L_}
t_PD-VCC-LH
t_PD-VCC-HL
I/O V_{CC_}
t_PD-VL-LH
t_PD-VL-HL
I/O V_{CC_}
I/O V_{L_}
t_RVCC
t_FVCC
t_RVL
t_FVL
Figure 1c. Open-Drain Driving I/O V_CC
Figure 1d. Open-Drain Driving I/O V_L
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