PI4ULS3V16
1.2V to 3.6V Universal Bi-directional
Level Shifter with Automatic Direction Control
Features
• Designed for low voltage operation: 1.2V to 3.6V
• Universal bidirectional level shifting without direction
control
• Fast bus speeds up to 180 Mbps
• Drive Capability 12mA
• Independent transition of each bit
• Each supply rail is configurable over supply range
• ESD Protection exceeds JESD22
– 2000V Human Body Model (A114-B)
– 200V Machine Model (A115-A)
• Latch-up performance exceeds 100mA per JESD 78
• Industrial operation at –40°C to +85°C
• Packaging (Pb-free & Green):
– 56-pin plastic 240-mil TSSOP (A56)
– 56-contact plastic 197-mil TQFN (ZF56)
Description
Pericom Semiconductor’s PI4ULS3V16 is a 16-bit (dual-octal)
non-inverting bus transceiver with two separate supply rails.
A port (V
CCA
) and B port (V
CCB
) are set to operate at 1.2V to
3.6V. This arrangement permits universal bidirectional translation
of differential signal levels over the voltage ranges.
PI4ULS3V16 is designed for asynchronous communication
between data buses. Data is transmitted from the A bus to the B
bus, or vice versa, without direction control. All A
X
, and B
X
are
tri-stated when data is coming from both directions at the same
time. The output-enable (OE) input is used to disable outputs so
buses are isolated.
The control pins,
x
SEL,
x
OE, TEST_EN and OUT_SEL are supplied
by V
CCB
.
To ensure the high-impedance state during power-up or power-
down, the output-enable (OE) input should be tied to V
CC
through
a pullup resistor.
Applications
Block Diagram
1
SEL
2
SEL
• Voltage Translation
• Bus Relay
TST
1
OE
OUT_SEL
TEST_EN
Testing and
Loading
Logic
1
A
1
1
B
1
To Seven Other Channels
1
SEL
2
SEL
OUT_SEL
TEST_EN
Testing and
Loading
Logic
TST
2
OE
2
A
1
2
B
1
To Seven Other Channels
07-0052
1
PS8775E
02/23/07
PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
