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http://www.union-ic.com Rev.02 Jun.2019 1/15
UM3208
8-Bit Bidirectional Voltage-Level Translator for Open-Drain and
Push-Pull Application
UM3208H CSP20 2.4×1.9
UM3208QA QFN20 4.5×3.5
UM3208UK TSSOP20
General Description
The UM3208 is 8-channel ESD-protected level translator provides the level shifting necessary to
allow data transfer in a multi-voltage system. Externally applied voltages, V
CCB
and V
CCA
, set the
logic levels on either side of the device. A low-voltage logic signal present on the V
CCA
side of the
device appears as a high-voltage logic signal on the V
CCB
side of the device, and vice-versa. The
UM3208 bidirectional level translator utilizes a transmission-gate based design to allow data
translation in either direction (V
CCA
↔V
CCB
) on any single data line. The UM3208 accepts V
CCA
from +1.65V to +3.6V and V
CCB
from +2.3V to +5.5V, making it ideal for data transfer between
low-voltage ASICs / PLDs and higher voltage systems.
The UM3208 enters a three-state output mode to reduce supply current when output enable (OE)
is low. The UM3208 is designed so that the OE input circuit is supplied by V
CCA
. ±8kV ESD
protection on the V
CCB
side for greater protection in applications that route signals externally.
The UM3208H is available in CSP20 2.4×1.9 bump package and specially features in wafer
backside coating process, making the chip more robust. The UM3208UK is available in TSSOP20
package and the UM3208QA is available in QFN20 4.5×3.5 package.
Applications
Features
z SPI, MICROWRE, and I
2
C Level
Translation
z Low-Voltage ASIC Level Translation
z Smart Card Readers
z Cell-phone Cradles
z Portable POS Systems
z Portable Communication Devices
z Low-Cost Serial Interfaces
z Cell-Phones
z GPS
z Telecommunications Equipment
z Max Data Rates:
24Mbps(Push Pull),
2Mbps(Open Drain)
z Bidirectional Level Translation
z 1.65V to 3.6V on A port and 2.3V to 5.5V
on B port(V
CCA
≤V
CCB
)
z ±8kV ESD Protection on B port
z Latch-Up Performance Exceeds 100mA
z No Power-Supply Sequencing Required
V
CCA
or V
CCB
Can Be Ramped First
z Low Power Consumption
