Page 1
Features
■ 18 Mbps (max) data rate when driven by a
totem pole driver
■ 6.8 Mbps (max) data rate when driven by an
open drain pole driver
■ Bi-directional level translation without
direction control pin
■ Wide V
■ Wide V
■ Power down mode feature – when either
voltage range of 1.65 to 3.6 V
L
voltage range of 1.80 to 5.5 V
CC
supply is off, all I/Os are in high impedance
■ Low quiescent current (max 8 µA)
■ Able to be driven by totem pole and open drain
drivers
■ 5.5 V tolerant enable pin
■ ESD performance on all pins: ±2 kV HBM
■ Small package and footprint
QFN16 (2.6 x 1.8 mm) package
Applications
■ Low voltage system level translation
■ Mobile phones and other mobile devices
2
■ I
C level translation
■ UART level translation
ST2349A
4-bit dual supply level translator
without direction control pin
QFN16
(2.6x1.8mm)
Description
The ST2349A is a 4-bit dual supply level
translator which provides the level shifting
capability to allow data transfer in a multi-voltage
system. Externally applied voltages, V
set the logic levels on either side of the device. It
utilizes transmission gate-based design that
allows bi-directional level translation without a
control pin.
The ST2349A accepts a V
and V
from 1.80 to 5.5 V, making it ideal for
CC
from 1.65 to 3.6 V
L
data transfer between low-voltage ASICs/PLD
and higher voltage systems. This device has a tristate output mode which can be used to disable
all I/Os.
The ST2349A supports power down mode when
V
is grounded/floating and the device is
CC
disabled via the OE pin.
and VL,
CC
Table 1. Device summary
Order code Package Packaging
ST2349AQTR QFN16 (2.6 x 1.8 mm) Tape and reel (3000 parts per reel)
June 2009 Doc ID 14908 Rev 2 1/20
www.st.com
20
Page 2
Contents ST2349A
Contents
1 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Device block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Supplementary notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Driver requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 Load driving capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.3 Power off feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.4 Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1 DC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.2 AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.2.1 Device driven by open drain driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.2.2 Device driven by totem pole driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2/20 Doc ID 14908 Rev 2
Page 3
ST2349A Pin settings
1 Pin settings
1.1 Pin connection
Figure 1. ST2349A pin connection (top through view)
)/
I/O
)/
1.2 Pin description
Table 2. ST2349A pin description
Pin number Symbol Name and function
1I/O
2 OE Output enable
3I/O
4I/O
5 NC No connection
6V
7V
8 NC No connection
9 I/O
10 I/O
11 GND Ground
6,
/%
6,
6,
6,
)/
6,6##)/
,
6
.#
6##
)/
.#
##
'.$
)/
/)
6##
6##
6##
6
VL2
VL3
VL4
L
CC
VCC4
VCC3
Data input/output
Data input/output
Data input/output
Supply voltage
Supply voltage
Data input/output
Data input/output
12 I/O
13 I/O
14 V
15 V
16 I/O
VCC2
VCC1
CC
L
VL1
Data input/output
Data input/output
Supply voltage
Supply voltage
Data input/output
Doc ID 14908 Rev 2 3/20
Page 4
Device block diagrams ST2349A
2 Device block diagrams
Figure 2. ST2349A block diagram
Figure 3. Application block diagram
V
V
L
0.1
μ
F
VL
system
controller
V
V
V
L VL
L
L
V
L
I/O
VL1
I/O
VL2
I/O
VL3
I/O
VL4
OE
V
I/O
I/O
I/O
I/O
CC
VCC1
VCC2
VCC3
VCC4
VCCVCCVCCV
CC
CC
V
system
controller
0.1 μF
CC
1μF
CD00023
4/20 Doc ID 14908 Rev 2
Page 5
ST2349A Supplementary notes
3 Supplementary notes
3.1 Driver requirement
The ST2349A may be driven by an open drain or totem pole driver and the nature of the
device’s output is “open drain”. It must not be used to drive a pull-down resistor since the
impedance of the output at HIGH state depends on the pull-up resistor placed at the I/Os.
As the device has pull-up resistors on both the I/O
ensure that the driver is able to sink the required amount of current. For example, if the
settings are V
=5.5V, VL= 4.3 V and the pull-up resistor is 10 kΩ, then the driver must be
CC
able to sink at least (5.5 V/10 kΩ) + (4.3 V/10 kΩ)
requirements of the ST2349A.
3.2 Load driving capability
To support the open drain system, the one-shot transistor is turned on only during high
transition at the output side. When it drives a high state, after the one-shot transistor is
turned off, only the pull-up resistor is able to maintain the state. In this case, the resistive
load is not recommended.
3.3 Power off feature
In some applications where it might be required to turn off one of the power supplies
powering up the level translator, the user may turn off the V
(device is disabled). There will be no current consumption in V
other causes, and the I/Os are in a high-impedance state in this mode.
3.4 Truth table
and I/OVL ports, the user needs to
VCC
= 1 mA and still meet the V
only when the OE pin is low
CC
due to floating gates or
L
IL
Table 3. Truth table
Enable Bi-directional Input/Output
OE I/O
(1)
H
(1)
H
L Z
1. High level VL power supply referred
2. High level VCC power supply referred
3. Z = high impedance
VCC
(2)
H
L L
(3)
I/O
H
Z
(1)
(3)
VL
Doc ID 14908 Rev 2 5/20
Page 6
Maximum rating ST2349A
4 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.
Table 4. Absolute maximum ratings
Symbol Parameter Value Unit
V
Supply voltage -0.3 to 4.6 V
L
V
V
V
I/OVL
V
I/OVCC
I
I/OVL
I
I/OVCC
I
SCTOUT
P
T
ESD Electrostatic discharge protection (HBM) ±2 kV
Supply voltage -0.3 to 6.5 V
CC
DC control input voltage -0.3 to 6.5 V
OE
DC I/OVL input voltage (OE = GND or VL) -0.3 to VL + 0.3 V
DC I/O
DC input diode current -20 mA
I
IK
input voltage (OE = GND or VL) -0.3 to VCC + 0.3 V
VCC
DC output current ±25 mA
DC output current ±258 mA
Short circuit duration, continuous 40 mA
Power dissipation
D
Storage temperature -65 to 150
STG
(1)
500 mW
TL Lead temperature (10 seconds) 300
o
C
o
C
1. 500mW: 65oC derated to 300 mW by 10W/oC: 65oC to 85oC
4.1 Recommended operating conditions
Table 5. Recommended operating conditions
Symbol Parameter Min Typ Max Unit
V
V
CC
V
VI/O
VI/O
T
dt/dV Input rise and fall time 0 1 ns/V
1. VCC must be greater than VL.
6/20 Doc ID 14908 Rev 2
Supply voltage 1.65 3.6 V
L
(1)
Supply voltage 1.8 5.5 V
Input voltage
OE
(OE output enable pin, VL power supply referred)
I/OVL voltage 0 V
VL
I/O
VCC
op
voltage 0 V
VCC
Operating temperature -40 85
03.6V
L
CC
V
V
o
C
Page 7
ST2349A Electrical characteristics
5 Electrical characteristics
5.1 DC characteristics
Over recommended operating conditions unless otherwise noted. All typical values are at
T
= 25 oC.
A
Table 6. DC characteristics
Val ue
Symbol Parameter V
1.65
IHL
High level input
voltage (I/O
VL
)
V
1.65
ILL
IHC
Low level input
voltage (I/O
VL
High level input
voltage
VCC
)
(I/O
)
1.65 to
V
V
V
L
V
Test conditions
CC
o
Min Typ Max Min Max
1.4 −− 1.4 −
2.0 1.6
2.5 2.0 −− 2.0 −
to 5.5 −
V
L
−− 1.6 −
3.0 2.4 −− 2.4 −
3.6 2.8 −− 2.8 −
2.0
2.5
3.0
3.6
to 5.5 −
V
L
1.8
2.5 2.3
−−
−−0.4 − 0.4
−−0.5 − 0.5
−−0.6 − 0.6
−−0.8 − 0.8
1.6 −− 1.6 −
0.3 − 0.3
−− 2.3 −
3.0 2.7 −− 2.7 −
CC
3.6 3.3 −− 3.3 −
−
4.3 3.5 −− 3.5 −
UnitTA = 25oC-40 to 85
C
V
V
V
5.5 4.2 −− 4.2 −
V
V
ILC
IH-OE
Low level input
voltage
VCC
)
(I/O
High level input
voltage (OE)
1.65 -
2.5
2.7 -
3.6
1.65
2.0 1.2
2.5 1.4 −− 1.4 −
3 - 5.5
3.6 - 5.5
to 5.5 −
V
L
−−−
−
0.3 −
V
−−−0.5 −
1.0 −− 1.0 −
−− 1.2 −
V
3.0 1.6 −− 1.6 −
3.6 2.0 −− 2.0 −
Doc ID 14908 Rev 2 7/20
Page 8
Electrical characteristics ST2349A
Table 6. DC characteristics (continued)
Val ue
Symbol Parameter V
1.65
OLL
OLC
OE
Low level input
voltage (OE)
Low level
output voltage
)
(I/O
VL
Low level
output voltage
VCC
)
(I/O
Control input
leakage current
1.65 to
1.65 to
1.65 to
V
V
V
IL-OE
I
(OE)
High
VCC
1.65 to
)
1.65 to
1.65 to
I
IO_LKG
I
QVCC
I
QVL
impedance
leakage current
, I/O
(I/O
VL
Quiescent
supply current
V
CC
Quiescent
supply current
V
L
High
I
Z-VCC
impedance
quiescent
1.65 to
supply current
V
CC
High
I
Z-VL
impedance
quiescent
1.65 to
supply current
V
L
2.0
2.5
3.0
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
L
V
Test conditions
CC
Min Typ Max Min Max
−−
0.33 − 0.33
−−0.40 − 0.40
to 5.5 −
V
L
−−0.50 − 0.50
−−0.60 − 0.60
−−0.75 − 0.75
to 5.5
V
L
VL to 5.5
to 5.5
V
L
to 5.5 OE = GND −−±0.1 − ±0.1 µA
V
L
to 5.5
V
L
to 5.5
V
L
to 5.5
V
L
to 5.5
V
L
IO = 1.0 mA
≤ 0.15 V
I/O
VCC
IO = 1.0 mA
I/OVL ≤ 0.15 V
= GND or
V
OE
V
L
only pull-up
resistor
connected to I/O
only pull-up
resistor
connected to I/O
OE = GND;
only pull-up
resistor
connected to I/O
OE = GND;
only pull-up
resistor
connected to I/O
−−0.40 − 0.40 V
−−0.40 − 0.40 V
−−±0.1 − ±0.1 µA
− 66.5 − 8µA
− 0.01 0.1 − 1µA
− 66.5 − 8µA
− 0.01 0.1 − 1µA
UnitTA = 25 oC-40 to 85 oC
V
8/20 Doc ID 14908 Rev 2
Page 9
ST2349A Electrical characteristics
5.2 AC characteristics
5.2.1 Device driven by open drain driver
Load CL=15pF; Rup=4.7kΩ; driver tr=t
Table 7. AC characteristics - test conditions: VL = 1.65 −1.8 V
Symbol Parameter
V
CC
≤ 2 ns over temperature range -40 °C to 85 °C.
f
V
=4.3−
=1.8−2.5 V VCC=2.7−3.6 V
CC
5.5 V
Unit
Min Max Min Max Min Max
t
RVCC
t
FVCC
t
RVL
t
FVL
t
I/OVL-VCC
t
I/OVCC-VL
t
PZL tPZH
t
PLZ tPHZ
D
1. The data rate is guaranteed based on the condition that the output I/O signal rise/fall time is less than 15% of the input I/O
signal period; the input I/O signal is at 50% duty cycle and the output I/O signal duty cycle deviation not less than 30%.
Rise time I/O
Fall time I/O
Rise time I/O
Fall time I/O
Propagation delay time
I/O
VL-LH
I/O
VL-HL
Propagation delay time
I/O
VCC-LH
I/O
VCC-HL
Output enable and
disable time
Data rate
R
VCC
VL
to I/O
to I/O
to I/O
to I/O
(1)
VCC
VL
VCC-LH
VCC-HL
VL-LH
VL-LH
t
PLH
t
PHL
t
PLH
t
PHL
En
Dis
− 80 − 60 − 45 ns
− 23.2 − 33.9 − 53.3 ns
− 60 − 45 − 35 ns
− 16.4 − 17.6 − 16.9 ns
− 3.4 − 2.0 − 2.0 ns
− 13.9 − 19.1 − 30.2 ns
− 2.0 − 2.0 − 2.6 ns
− 8.6 − 9.0 − 9.5 ns
− 10 − 10 − 10 ns
− 40 − 40 − 40 ns
− 1.8 − 2.2 − 3.4 MHz
Table 8. AC characteristics - test conditions: VL=2.5−2.7 V
V
Symbol Parameter
t
RVCC
t
FVCC
t
RVL
t
FVL
t
I/OVL-VCC
t
I/OVCC-VL
Rise time I/O
Fall time I/O
Rise time I/O
Fall time I/O
VCC
VCC
VL
VL
Propagation delay time
VL-LH
VL-HL
to I/O
to I/O
VCC-LH
VCC-HL
I/O
I/O
Propagation delay time
I/O
VCC-LH
I/O
VCC-HL
to I/O
to I/O
VL-LH
VL-LH
t
PLH
t
PHL
t
PLH
t
PHL
Doc ID 14908 Rev 2 9/20
CC
Min Max Min Max
− 70.0 − 50 ns
− 14.8 − 19.1 ns
− 50.0 − 35 ns
− 9.8 − 10 ns
− 2.0 − 2.0 ns
− 8.2 − 11.6 ns
− 2.0 − 2.0 ns
− 5.3 − 5.9 ns
=2.7 −3.6 V VCC=4.3− 5.5 V
Unit
Page 10
Electrical characteristics ST2349A
Table 8. AC characteristics - test conditions: VL=2.5−2.7 V (continued)
V
=2.7 −3.6 V VCC=4.3− 5.5 V
Symbol Parameter
CC
Unit
Min Max Min Max
t
PZL tPZH
t
PLZ tPHZ
D
R
1. The data rate is guaranteed based on the condition that the output I/O signal rise/fall time is less than 15% of the input I/O
signal period; the input I/O signal is at 50% duty cycle and the output I/O signal duty cycle deviation not less than 30%.
Output enable and
disable time
Data rate
(1)
En
Dis
− 6 − 6ns
− 40 − 40 ns
− 2.2 − 3.0 MHz
Table 9. AC characteristics - test conditions: VL = 2.7 −3.6 V
V
= 4.3 − 5.5 V
Symbol Parameter
t
RVCC
t
FVCC
t
RVL
t
FVL
t
I/OVL-VCC
t
I/OVCC-VL
t
PZL tPZH
t
PLZ tPHZ
D
R
1. The data rate is guaranteed based on the condition that the output I/O signal rise/fall time is less than 15% of the input I/O
signal period; the input I/O signal is at 50% duty cycle and the output I/O signal duty cycle deviation not less than 30%.
Rise time I/O
Fall time I/O
Rise time I/O
Fall time I/O
VCC
VCC
VL
VL
Propagation delay time
VL-LH
VL-HL
to I/O
to I/O
VCC-LH
VCC-HL
I/O
I/O
Propagation delay time
I/O
VCC-LH
I/O
VCC-HL
to I/O
to I/O
VL-LH
VL-HL
Output enable and disable time
Data rate
(1)
t
PLH
t
PHL
t
PLH
t
PHL
En
Dis
−−3.0 MHz
CC
Unit
Min Max
− 55.0 ns
− 17.2 ns
− 40.0 ns
− 9.7 ns
− 2.0 ns
− 10.6 ns
− 2.0 ns
− 4.8 ns
− 6ns
− 40 ns
10/20 Doc ID 14908 Rev 2
Page 11
ST2349A Electrical characteristics
5.2.2 Device driven by totem pole driver
Load CL=15pF; Rup=10kΩ; driver tr=tf ≤ 2 ns) over temperature range -40 °C to 85 °C.
Table 10. AC characteristics - test conditions: VL=1.65– 1.8 V
V
=1.8–2.5V VCC=2.7–3.6V VCC=4.3–5.5V
Symbol Parameter
CC
Unit
Min Max Min Max Min Max
t
RVCC
t
FVCC
t
RVL
t
FVL
t
I/OVL-
VCC
t
I/OVCC-
VL
t
PZL tPZH
t
PLZ tPHZ
D
1. The data rate is guaranteed based on the condition that the output I/O signal rise/fall time is less than 15% of the input I/O
signal period; the input I/O signal is at 50% duty cycle and the output I/O signal duty cycle deviation not less than 30%.
Rise time I/O
Fall time I/O
Rise time I/O
Fall time I/O
Propagation delay time
I/O
VL-LH
I/O
VL-HL
Propagation delay time
I/O
VCC-LH
I/O
VCC-HL
Output enable and
disable time
Data rate
R
VCC
VL
to I/O
to I/O
to I/O
to I/O
(1)
VCC
VL
VCC-LH
VCC-HL
VL-LH
VL-HL
t
PLH
t
PHL
t
PLH
t
PHL
En
Dis
− 7.2 − 4.6 − 1.4 ns
− 23.2 − 33.9 − 53.3 ns
− 5.9 − 5.7 − 5.5 ns
− 16.4 − 17.6 − 16.9 ns
− 5.5 − 4.1 − 3.6 ns
− 13.9 − 19.1 − 30.2 ns
− 4.5 − 3.9 − 3.6 ns
− 8.6 − 9 − 9.5 ns
− 10 − 10 − 10 ns
− 40 − 40 − 40 ns
− 6.4 − 4.5 − 3MHz
Table 11. AC characteristics - test conditions: VL=2.5– 2.7 V
V
=2.7 − 3.6 V VCC=4.3− 5.5 V
Symbol Parameter
t
RVCC
t
FVCC
t
RVL
t
FVL
t
I/OVL-VCC
Rise time I/O
Fall time I/O
Rise time I/O
Fall time I/O
VCC
VCC
VL
VL
Propagation delay time
I/O
I/O
VL-LH
VL-HL
to I/O
to I/O
VCC-LH
VCC-HL
t
PLH
t
PHL
CC
Min Max Min Max
− 3.8 − 2.8 ns
− 14.8 − 19.1 ns
− 3.3 − 3.2 ns
− 9.8 − 10.0 ns
− 3.2 − 2.8 ns
− 8.2 − 11.6 ns
Doc ID 14908 Rev 2 11/20
Unit
Page 12
Electrical characteristics ST2349A
Table 11. AC characteristics - test conditions: VL=2.5– 2.7 V (continued)
V
=2.7 −3.6 V VCC=4.3−5.5 V
Symbol Parameter
CC
Unit
Min Max Min Max
t
Propagation delay time
t
I/OVCC-VL
t
PZL tPZH
t
PLZ tPHZ
D
R
1. The data rate is guaranteed based on the condition that the output I/O signal rise/fall time is less than 15% of the input I/O
signal period; the input I/O signal is at 50% duty cycle and the output I/O signal duty cycle deviation not less than 30%.
Table 12. AC characteristics - test conditions: VL=2.7– 3.6 V
I/O
VCC-LH
I/O
VCC-HL
Output enable and
disable time
Data rate
to I/O
to I/O
(1)
VL-LH
VL-HL
PLH
t
PHL
En
Dis
Symbol Parameter
− 2.6 − 2.0
ns
ns
− 5.3 − 5.9
ns
− 6 − 6ns
− 40 − 40 ns
− 9 − 6.8 MHz
V
=4.3−5.5 V
CC
Unit
Min Max
ns
t
RVCC
t
FVCC
t
RVL
t
FVL
t
I/OVL-VCC
Rise time I/O
Fall time I/O
Rise time I/O
Fall time I/O
VCC
VCC
VL
VL
Propagation delay time
VL-LH
VL-HL
to I/O
to I/O
VCC-LH
VCC-HL
I/O
I/O
t
PLH
t
PHL
− 2.9 ns
− 17.2 ns
− 3.0 ns
− 9.7 ns
− 2.7 ns
− 10.6 ns
ns
t
Propagation delay time
t
I/OVCC-VL
t
PZL tPZH
t
PLZ tPHZ
D
R
1. The data rate is guaranteed based on the condition that the output I/O signal rise/fall time is less than 15% of the input I/O
signal period; the input I/O signal is at 50% duty cycle and the output I/O signal duty cycle deviation not less than 30%.
I/O
VCC-LH
I/O
VCC-HL
Output enable and disable
time
Data rate
(1)
to I/O
to I/O
VL-LH
VL-HL
PLH
t
PHL
En
Dis
− 1.9
ns
ns
− 4.8
ns
− 6ns
− 40 ns
− 7.2 MHz
12/20 Doc ID 14908 Rev 2
Page 13
ST2349A Test circuit
6 Test circuit
Figure 4. Test circuit
V
Pulse
generator
V
CC
V
L
R
up
L
D.U.T
V
CC
V
R
up
L
V
CC
OPEN
GND
C
L
CS14021
Table 13. Test circuit switches
Test
Driving I/O
t
PLH
, t
PHL
Open Open Open
VL
Switch
Driving I/O
VCC
Open drain driving
Doc ID 14908 Rev 2 13/20
Page 14
Test circuit ST2349A
Table 14. Waveform symbol value
Symbol
V
IH
V
IM
V
OM
V
X
V
Y
1.8 V ≤ VL≤ V
2.5 V
V
L
50% V
L
50% V
CC
Driving I/O
CC
VL
≤
3.3 V ≤ VL≤ V
5.0 V
V
50% V
50% V
≤
CC
L
L
CC
1.8 V ≤ VL≤ V
50% V
VOL +0.15V VOL +0.3V VOL +0.15V VOL +0.3V
VOH -0.15V VOH -0.3V VOH -0.15V VOH -0.3V
2.5 V
V
CC
50% V
Driving I/O
≤
CC
CC
L
Figure 5. Waveform - propagation delay (f = 1 MHz; 50% duty cycle)
VCC
3.3V ≤ VL≤ V
5.0 V
V
CC
50% V
CC
50% V
≤
CC
L
Figure 6. Waveform - output enable and disable time (f = 1 MHz; 50% duty cycle)
14/20 Doc ID 14908 Rev 2
Page 15
ST2349A Package mechanical data
7 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
Figure 7. Package outline for QFN16 (2.6 x 1.8 x 0.55 mm) - 0.40 mm pitch
BOTTOM VIEW
QFN16L
1. Drawing not to scale.
2. Dimensions are in millimeters.
Doc ID 14908 Rev 2 15/20
Page 16
Package mechanical data ST2349A
Table 15. Mechanical data for QFN16 (2.6 x 1.8 x 0.55 mm) - 0.40 mm pitch
Millimeters
Symbol
Typ Min Max
A 0.55 0.45 0.60
A1 0.02 0 0.05
b 0.20 0.15 0.25
D 2.60 2.50 2.70
E 1.80 1.70 1.90
e 0.40 −−
L 0.40 0.35 0.45
Figure 8. Footprint recommentations for QFN16 (2.6 x 1.8 x 0.55 mm) - 0.40 mm
pitch
1. Drawing not to scale.
2. Dimensions are in millimeters.
16/20 Doc ID 14908 Rev 2
7874009
Page 17
ST2349A Package mechanical data
Figure 9. Carrier tape for QFN16 (2.6 x 1.8 x 0.55 mm) - 0.40 mm pitch
785978-J
Doc ID 14908 Rev 2 17/20
Page 18
Package mechanical data ST2349A
Figure 10. Reel information for QFN16 (2.6 x 1.8 x 0.55 mm) - 0.40 mm pitch
1. Drawing not to scale.
2. Dimensions are in millimeters
18/20 Doc ID 14908 Rev 2
7875978
Page 19
ST2349A Revision history
8 Revision history
Table 16. Document revision history
Date Revision Changes
16-Jul-2008 1 Initial release.
Document status promoted from Preliminary data to datasheet.
Content reworked to improve readability.
22-Jun-2009 2
Updated: Table 7 on page 9, Table 8 on page 9, Table 9 on page 10,
Table 10 on page 11, Table 11 on page 11 and Table 12 on page 12.
Modified: ECOPACK information.
Doc ID 14908 Rev 2 19/20
Page 20
ST2349A
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20/20 Doc ID 14908 Rev 2
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