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8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
FOR OPEN-DRAIN AND PUSH-PULL APPLICATIONS
SCES642 – DECEMBER 2007
1
FEATURES
1.2 V to 3.6 V on A Port and 1.65 V to 5.5 V on
B Port (V
CCA
≤
V
CCB
)
V
CC
Isolation Feature – If Either V
CC
Input Is
at GND, All Outputs Are in the High-Impedance
State
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Protection Exceeds JESD 22 (A Port)
– 2000-V Human-Body Model (A114-B)
– 150-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
IEC 61000-4-2 ESD (B Port)
– ±8-kV Contact Discharge
– ±6-kV Air-Gap Discharge
•
•
ZXY PACKAGE
(BOTTOM VIEW)
1
D
C
B
A
2
3
4
5
•
•
TERMINAL ASSIGNMENTS
1
D
C
B
A
V
CCB
B1
A1
V
CCA
2
B2
B3
A3
A2
3
B4
B5
A5
A4
4
B6
B7
A7
A6
5
B8
GND
OE
A8
•
PW PACKAGE
(TOP VIEW)
A1
V
CCA
A2
A3
A4
A5
A6
A7
A8
OE
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
RGY PACKAGE
(TOP VIEW)
A1
B1
V
CCB
B2
B3
B4
B5
B6
B7
B8
GND
1
20
19
18
17
16
15
14
13
12
B1
V
CCA
A2
A3
A4
A5
A6
A7
A8
2
3
4
5
6
7
8
9
10
11
V
CCB
B2
B3
B4
B5
B6
B7
B8
DESCRIPTION/ORDERING INFORMATION
This 8-bit noninverting translator uses two separate configurable power-supply rails. The A port is designed to
track V
CCA
. V
CCA
accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track V
CCB
. V
CCB
accepts any supply voltage from 1.65 V to 5.5 V. This allows for low-voltage bidirectional translation between any
of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes.
When the output-enable (OE) input is low, all outputs are placed in the high-impedance state.
To ensure the high-impedance state during power up or power down, OE should be tied to GND through a
pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007, Texas Instruments Incorporated
GND
OE