Features
ST1G3234
1-bit dual supply bus buffer level translator
with A-side series resistor
■ High speed: t
V
= 1.65V; V
CCB
■ Low power dissipation:
I
= I
CCA
■ Symmetrical output impedance:
|I
V
|I
V
■ Balanced propagation delays:
t
PLH
■
Power down protection on inputs and outputs
■ 26Ω series resistor on A-side outputs
| = I
OHA
= 2.75V; V
CCA
| = I
OHA
= 2.3V; V
CCA
≅ t
CCB
OLA
OLA
PHL
= 4.4ns (Max.) at TA = 85°C
PD
CCA
= 3.0V
= 5µA(Max.) at TA = 85°C
= 10mA Min at
= 1.4V to 3.6V
CCB
= 6mA Min at
= 1.4V to 3.6V
CCB
– Operating voltage range:
V
(Opr) = 1.4V to 3.6V (1.2V data
CCA
retent)
V
(Opr) = 1.4V to 3.6V (1.2V data
CCB
retent)
■ Max data rates:
380Mbps (1.8V to 3.3V translation)
260Mbps (<1.8V to 3.3V translation)
260Mbps (translate to 2.5V)
210Mbps (translate to 1.5V)
■ Latch-up performance exceeds 500mA
(JESD 17)
■ ESD performance:
HBM > 2000V (MIL STD 883 method 3015);
MM > 200V
■ R
HS compliant for Flip-Chip package
O
Flip-Chip 5
Description
The ST1G3234 is a dual supply low voltage
CMOS 1-Bit bus buffer level translator fabricated
with sub-micron silicon gate and five-layer metal
wiring C
interface between a 3.3V bus and a 2.5V or 1.8V
bus in a mixed 3.3V/1.8V, 3.3V/2.5V, 1.8V/1.4V
and 2.5V/1.8V supply systems, it achieves high
speed operation while maintaining the CMOS low
power dissipation.
This IC is intended for one-way asynchronous
communication between data buses. The input
and output power down protections disable the
device when both power supply are down, so that
the buses are effectively isolated.
The input tolerant buffers allow to translate V
compatible signals and greater signals than V
up/down to V
All inputs are equipped with protection circuits
against static discharge, giving them ESD
immunity and transient excess voltage.
2
MOS technology. Designed for use as an
CCB
CCB
CCA
.
Order codes
Part number Package Comments
ST1G3234BJR Flip-Chip 5 4000 parts per reel
August 2006 Rev 6 1/15
www.st.com
15
Contents ST1G3234
Contents
1 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2/15
ST1G3234 Pin settings
1 Pin settings
1.1 Pin connection
Figure 1. Pin connection (top through view)
1.2 Pin description
Table 1. Pin description
Pin N° Symbol Name and function
A1 A1 Data output (V
C1 B1 Data input (V
B2 GND Ground (0V)
A3 V
C3 V
CCA
CCB
referred)
CCA
referred)
CCB
Positive supply voltage
Positive supply voltage
3/15
Device summary ST1G3234
2 Device summary
Figure 2. Input equivalent circuit
Figure 3. Logic diagram
Table 2. Truth table
Inputs B1 (V
4/15
Referred) Outputs A1 (V
CCB
LL
HH
Referred)
CCA
ST1G3234 Maximum rating
3 Maximum rating
Stressing the device above the rating listed in the “Absolute Maximum Ratings” table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the Operating sections of
this specification is not implied. Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability. Refer also to the STMicroelectronics SURE
Program and other relevant quality documents.
Table 3. Absolute maximum ratings
Symbol Parameter Value Unit
V
V
V
V
I
I
T
V
V
I
I
CCA
CCB
Output supply voltage -0.5 to +4.6 V
CCA
Input supply voltage -0.5 to + 4.6 V
CCB
DC output voltage
OA
(power down mode: V
DC input voltage
IB
(power down mode: V
DC output voltage
OA
DC input voltage -0.5 to + 4.6 V
IB
I
DC input diode current − 20 mA
IK
DC output diode current − 50 mA
OK
DC output current ± 50 mA
OA
DC V
DC V
P
Power dissipation 200 mW
d
Storage temperature -65 to +150 °C
stg
T
Lead temperature (10 sec) 260 °C
L
or ground current
CCA
or ground current
CCB
CCA=VCCB
CCA=VCCB
=Gnd)
=Gnd)
-0.5 to +4.6 V
-0.5 to +4.6 V
-0.5 to V
CCA
± 100 mA
± 100 mA
+ 0.5
V
5/15
Maximum rating ST1G3234
3.1 Recommended operating conditions
Table 4. Recommended operating conditions
Symbol Parameter Value Unit
V
CCA
V
CCB
V
V
T
dt/dv
1. VI from 0.8V to 2.0V at VCC = 3.0V
Supply voltage 1.4 to 3.6 V
Supply voltage
Input voltage (B1)
IB
Output voltage (A1)
OA
Operating temperature -40 to 85 °C
op
Input Rise and Fall Time
(1)
V
= 3.0 to 3.6V
CCB
V
= 2.3 to 2.7V
CCB
V
= 1.4 to 1.95V
CCB
1.4 to 3.6
0 to V
CCB
0 to V
CCA
0 to 10 ns/V
0 to 20 ns/V
0 to 100 ns/V
V
V
V
6/15
ST1G3234 Electrical characteristics
4 Electrical characteristics
Table 5. DC specification
Test condition Value
Symbol Parameter
V
(V)
CCB
(1)
V
(V)
CCA
(1)
TA = 25 °C
Min Max Min Max
-40 to 85 °C
Unit
V
V
V
OHA
V
OLA
I
I
OFF
I
CCtB
High level input
IHB
voltage
Low level input
ILB
voltage
High level
output voltage
Low level output
voltage
Input leakage
IB
current
Power OFF
leakage current
Quiescent
supply current
1.4
1.8
1.4 to
3.6V
2.5 1.6 1.6
0.65V
0.65V
CCB
CCB
0.65V
0.65V
CCB
CCB
3.3 2.0 2.0
1.4
1.8
1.4 to
3.6V
2.5 0.7 0.7
0.35V
0.35V
CCB
CCB
0.35V
0.35V
3.3 0.8 0.8
=-100µA
1.4
2.75
1.4 to
3.6V
2.3
1.65
1.4
1.4
2.75
3.6V
2.75
2.3
1.4 to
1.65
1.4
2.7 3.6
1.4 2.7
00
1.4 to
1.4 to
3.6V
3.6V
I
O
=-10mA
I
O
I
=-6mA
O
I
=-2mA
O
I
=-1mA
O
I
=100µA
O
=1mA
I
O
I
=10mA
O
I
=6mA
O
I
=2mA
O
I
=1mA
O
=V
V
IB
CCB
V
=3.6V or GND
IB
V
=GND to 3.6V
IB
=GND to 3.6V
V
OA
VIB =V
CCB
or GND
or GND
1.2 1.2
2.2 2.2
1.8 1.8
1.4 1.4
1.1 1.1
0.20 0.20
0.40 0.40
0.55 0.55
0.40 0.40
0.25 0.25
0.20 0.20
± 0.5 ± 5 µA
± 0.5 ± 5 µA
± 1.0 ± 10 µA
0.5 5 µA
CCB
CCB
V
V
V
V
I
CCtA
1. VCC range = 3.3 ± 0.3; 2.5 ± 0.2V; 1.8 ± 0.15V
Quiescent
supply current
1.4 to
3.6V
1.4 to
3.6V
VIB =V
CCB
or GND
0.5 5 µA
7/15
Electrical characteristics ST1G3234
Table 6. AC electrical characteristics
Test condition Value
Symbol Parameter
t
PLH tPHL
t
PLH tPHL
Propagation delay time B1 to A1
Propagation delay time B1 to A1
Table 7. Capacitance characteristics
V
CCB
(V)
V
CCA
(V)
2.3 to 3.6 1.4
-40 to 85 °C
Min Max
2.0 5.0
1.4 to 1.95 1.4 2.0 5.0
2.3 to 3.6 1.65 to 1.95 2.0 4.5
C
1.4 to 1.95 1.65 to 1.95 2.0 4.8
= 10 pF
L
1.4 to 1.95 2.3 to 2.7 2.0 3.5
1.4 to 1.95 3.0 to 3.6 2.0 3.5
2.3 to 2.7 3.0 to 3.6 1.0 3.0
2.3 to 3.6 1.4
2.0 5.5
1.4 to 1.95 1.4 2.0 5.5
2.3 to 3.6 1.65 to 1.95 2.0 5.0
C
= 30 pF
1.4 to 1.95 1.65 to 1.95 2.0 5.2
L
= 500 Ω
R
L
1.4 to 1.95 2.3 to 2.7 2.0 4.0
1.4 to 1.95 3.0 to 3.6 2.0 4.0
2.3 to 2.7 3.0 to 3.6 1.0 3.5
Test condition Value
Unit
ns
ns
Symbol Parameter
C
C
Input capacitance open open 5 pF
INB
Output capacitance 2.5 3.3 6 pF
O
V
CCB
(V)
V
CCA
(V)
2.5 3.3
1.8 3.3 27
C
Power dissipation
PD
capacitance
1.4 2.5 23
f = 10MHz
1.4 1.8 20
3.3 1.8 27
Note: 1 C
is defined as the value of the IC’s internal equivalent capacitance which is calculated
PD
from the operating current consumption without load. (Refer to Test Circuit). Average current
can be obtained by the following equation. I
8/15
= 25 °C
T
A
Min Typ Max Min Max
27
= CPD x VCC x fIN + ICC/4 (per circuit)
CC(opr)
-40 to 85 °C
Unit
pF
ST1G3234 Test circuit
5 Test circuit
Figure 4. Test circuit
Table 8. Test circuit
Tes t Sw itch
, t
t
PLH
PHL
= 10/30pF or equivalent (includes jig and probe capacitance)
C
L
R
= R1 = 500Ω or equivalent
L
R
= Z
T
of pulse generator (typically 50Ω)
OUT
Open
9/15
Waveforms ST1G3234
6 Waveforms
Table 9. Waveform symbol value
V
Symbol
3.0 to 3.6V 2.3 to 2.7V 1.65 to 1.95V
V
IH
V
M
V
X
V
Y
V
CC
1.5V VCC/2 VCC/2
VOL +0.3V VOL +0.15V VOL +0.15V
VOL -0.3V VOL -0.15V VOL -0.15V
Figure 5. Waveform - propagation delay (f = 1MHz; 50% duty cycle)
CC
V
CC
V
CC
10/15
ST1G3234 Package mechanical data
7 Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a Lead-free second level interconnect . The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com
Figure 6. Marking
Note: X = Marking Area; Marking Code 9537
11/15
Package mechanical data ST1G3234
Flip-Chip 5 MECHANICAL DATA
DIM.
MIN. TYP MAX. MIN. TYP. MAX.
A 0.585 0.65 0.715 23.0 25.6 28.1
A1 0.21 0.25 0.29 8.3 9.8 11.4
a2 0.40 15.7
b 0.265 0.31 5 0.365 10.4 12.4 14.4
D 1.31 1.36 1.41 51.6 53.5 55.5
D1 0.866 34.1
E 0.97 1.02 1.07 38.2 40.2 42. 1
E1 0.5 19.7
eD 0 .383 0.433 0.483 15. 1 17.0 19.0
eE 0.20 0.25 0.30 7.9 9.8 11.8
fD 0.247 9.7
fE 0.260 10.2
ccc 0.080 3.1
mm. mils
12/15
7224716F
ST1G3234 Package mechanical data
Tape & Reel Flip-Chip 5 MECHANICAL DATA
DIM.
MIN. TYP MAX. MIN. TYP. MAX.
A 178 6.926
C 12.8 13.2 0. 504 0.519
D 20.2 0.795
N 49 50 51 1.929 1.969 2.008
T 12.4 0.488
Ao 1.60 1.65 1.70 0.063 0.065 0.067
Bo 1.27 1.32 1.37 0.050 0.052 0.054
Ko 0.76 0.81 0.86 0.030 0.032 0.034
Po 3.9 4 4.1 0. 153 0.157 0.161
P 3.9 4 4.1 0.153 0.157 0.161
mm. inch
13/15
Revision history ST1G3234
8 Revision history
Table 10. Revision history
Date Revision Changes
14-Oct-2004 1 First release.
20-Dec-2004 2 Revision on Table 3.
11-Feb-2005 3 Add Tape & Reel, Figures 2, 3, 5, 6, Ta b le 3 , 5, 7 and Mechanical
Data has been modified.
30-Mar-2005 4 Add features ==> Max data rates.
09-May-2005 5 Ta b le 7 and Ta b le 8 have been updated.
16-Aug-2006 6 New template, updated test condition V
OHA
Ta bl e 5
14/15
ST1G3234
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