PI74STX2G4245
2-Bit Level Shifting Buffer/Transceiver
with Configurable Dual Supply Voltage
Features
• Operation Voltage: 1.65V ≤ V
CCA
≤ 3.6V
2.3V ≤ V
CCB
≤ 5.5V
V
CCA
≤ V
CCB
• High Speed: tpd = 5ns typical into 30pF @ 3V V
CC
• Power down high-impedance inputs and outputs
• High output drive: ±12mA at 3V V
CCA
/V
CCB
±24mA at 5V V
CCB
• Industrial operation at –40°C to +85°C
• Packaging (Pb-free & Green available):
- 8-pin MSOP (U)
- 12-pin TDFN (ZE)
Description
Pericom Semiconductor’s PI74STX2G4245, a 2-bit noninverting
buffer/transceiver, contains two separate supply rails:A port
(V
CCA
), set to operate from 1.8V to 3.3V; B port (V
CCB
), set
to operate from 2.5V to 5V. The A1 to B1 translation is con-
figured as an unidirectional buffer; the translation between
A2 and B2 is bidirectional and its direction is controlled
by the DIR pin. The DIR pin is supplied by V
CCB
.
Block Diagram
DIR
Pin Configuration (MSOP)
(1.8V to 3.3V)
V
CCA
4
1
2
3
4
8
7
6
5
V
CCB
(2.5V to 5V)
B1
B2
GND
A2
3
6
A1
B2
A2
DIR
A1
2
7
B1
Function Table
Input
DIR
L
H
X
DATA
B2
A2
A1
Output
A2
B2
B1
Pin Configuration (TDFN)
NC
(1.8V to 3.3V ) V
CCA
A1
A2
DIR
NC
1
2
3
4
5
6
12
11
10
9
8
7
NC
V
CCB
(2.5V to 5V)
B1
B2
GND
NC
Pin Description
Pin Name
DIR
A1
B1
A2, B2
V
CCA
, V
CCB
Description
Direction Control
Data Input
Data Output
Data Input/Output
Power Supply
1
* NC = No Connect
PS8729C
09/27/04
PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
