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ST4G3235
4-bit dual supply bus buffer level translator with a side series resistor
Features

High speed: tPD = 4.3ns (Max.) at TA = 85C VCCB = 1.65V; VCCA = 3.0V Low power dissipation: ICCA = ICCB = 5A(Max.) at TA=85C Symmetrical output impedance: |IOHA| = IOLA = 10mA Min at VCCA = 2.75V; VCCB = 1.4V to 3.6V |IOHB| = IOLB = 4mA Min at VCCB = 1.65V; VCCA = 1.4 to 3.6V) Balanced propagation delays: tPLH tPHL Power down protection on inputs and outputs 26 series resistor on a side outputs Operating voltage range: VCCA(Opr) = 1.4V to 3.6V VCCB(Opr) = 1.4V to 3.6V 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 ROHS compliant for Flip-Chip package
Flip-Chip11

Description
The ST4G3235 is a dual supply low voltage CMOS 4-bit bus buffer level translator fabricated with sub-micron silicon gate and five-layer metal wiring C2MOS technology. Designed for use as an 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 VCCB compatible signals and greater signals than VCCB up/down to VCCA and viceversa. All inputs are equipped with protection circuits against static discharge, giving them ESD immunity and transient excess voltage.

Table 1. Device summary
Part number ST4G3235BJR Package Flip-Chip11 Packaging 4000 parts per reel
June 2007
Rev 7
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Contents
ST4G3235
Contents
1 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 1.2 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 3
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 5 6 7 8
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
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ST4G3235
Pin settings
1
1.1
Pin settings
Pin connection
Figure 1. Pin connection (top through view)
1.2
Pin description
Table 2. Pin description
Pin N A1 A3 A5 A7 C1 C3 C5 C7 B2 B6 B4 Symbol A4 A3 A2 A1 B4 B3 B2 B1 GND VCCA VCCB Name and function Data input (VCCA referred) Data input (VCCA referred) Data output (VCCA referred) Data output (VCCA referred) Data output (VCCB referred) Data output (VCCB referred) Data input (VCCB referred) Data input (VCCB referred) Ground (0V) Positive supply voltage Positivsoltage
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Device summary
ST4G3235
2
Device summary
Figure 2. Input equivalent circuit
Figure 3.
Logic diagram
Table 3. Truth table
Inputs Bn (VCCB Referred) L H n = 1..2 Inputs An (VCCB Referred) L H n = 3..4 Outputs Bn (VCCA Referred) L H Outputs An (VCCA Referred) L H
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ST4G3235
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 4. Absolute maximum ratings
Symbol VCCA VCCB VO VI VOA VOB VIA VIB IIK IOK IOA ICCA ICCB Pd Tstg TL Output supply voltage Input supply voltage DC output voltage (Power down mode: VCCA=VCCB=Gnd) DC Input Voltage (Power down mode: VCCA=VCCB=Gnd) DC output voltage (A1, A2 Outputs) DC output voltage (B3, B4 Outputs) DC input voltage (A3, A4 Inputs) DC input voltage (B1, B2 Inputs) DC input diode Current DC output diode current DC output current DC VCCA or ground current DC VCCB or ground current Power dissipation Storage temperature Lead temperature (10 sec) Parameter Value -0.5 to +4.6 -0.5 to VCCA + 0.5 -0.5 to +4.6 -0.5 to +4.6 -0.5 to VCCA + 0.5 -0.5 to VCCA + 0.5 -0.5 to +4.6 -0.5 to +4.6 - 20 - 50 50 100 100 400 -65 to +150 260 Unit V V V V V V V V mA mA mA mA mA mW C C
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Maximum rating
ST4G3235
3.1
Recommended operating conditions
Table 5. Recommended operating conditions
Symbol VCCA VCCB VIB VIA VOB VOA Top Supply voltage Supply voltage Input voltage (B1, B2) Input voltage (A3, A4) Output voltage (B3, B4) Output voltage (A1, A2) Operating temperature VCCB = 3.0 to 3.6V dt/dv Input rise and fall time (1) VCCB = 2.3 to 2.7V VCCB = 1.4 to 1.95V
1. VI from 0.8V to 2.0V at VCC = 3.0V
Parameter
Value 1.4 to 3.6 1.4 to 3.6 0 to VCCB 0 to VCCA 0 to VCCB 0 to VCCA -40 to 85 0 to 10 0 to 20 0 to 100
Unit V V V V V V C ns/V ns/V ns/V
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ST4G3235
Electrical characteristics
4
Electrical characteristics
Table 6. DC Specification for VCCA
Test condition Symbol Parameter VCCB (V)(1) VCCA (V)(1) 1.4 VIHA High level input voltage (A3-A4) 1.4 to 3.6V 1.8 2.5 3.3 1.4 VILA Low level input voltage (A3-A4) 1.4 to 3.6V 1.8 2.5 3.3 1.4 2.75 VOHA High level 1.4 to output voltage 3.6V (A1-A2) 2.75 2.3 1.65 1.4 1.4 2.75 VOLA Low level 1.4 to output voltage 3.6V (A1-A2) 2.75 2.3 1.65 1.4 Input leakage current (A3-A4) 2.7 1.4 3.6 2.7 IO=-100A IO=-0.4mA IO=-10mA IO=-6mA IO=-2mA IO=-1mA IO=100A IO=1mA IO=10mA IO=6mA IO=2mA IO=1mA VIA=VCCA or GND VIA=3.6V or GND 1.2 2.5 2.2 1.8 1.4 1.1 0.20 0.40 0.55 0.40 0.25 0.20 0.5 0.5 Min. 0.65VCCA 0.65VCCA 1.6 2.0 0.35VCCA 0.35VCCA 0.7 0.8 1.2 2.5 2.2 V 1.8 1.4 1.1 0.20 0.40 0.55 V 0.40 0.25 0.20 5 5 A A TA = 25 C Typ. Max. Value -40 to 85 C Min. 0.65VCCA 0.65VCCA 1.6 2.0 0.35VCCA 0.35VCCA 0.7 0.8 V V Max. Unit
IIA
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Electrical characteristics Table 6. DC Specification for VCCA
Test condition Symbol Parameter VCCB (V)
(1)
ST4G3235
Value TA = 25 C Min. Typ. Max. -40 to 85 C Min. Max. Unit
VCCA (V)
(1)
IOFF
Power off leakage current
0
0
VIB=GND to 3.6V VOA=GND to 3.6V VIA=GND to 3.6V VOB=GND to 3.6V VIA =VCCA or GND VIB =VCCB or GND VIA =VCCA - 0.6V VIA =VCCA or GND VIB =VCCB or GND
1.0
10
A
ICCtA
Quiescent 1.4 to supply current 3.6V 2.7
1.4 to 3.6V 3.6 3.6 2.7
0.5
5
A
ICCtA
Maximum quiescent supply current / Input (An)
1.95 1.95
0.75
mA
1. VCC range = 3.30.3; 2.50.2V; 1.80.15V
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ST4G3235
Electrical characteristics
Table 7. DC Specification for VCCB
Test condition Symbol Parameter VCCB (V)
(1)
Value TA = 25 C Min. 0.65VCCB Typ. Max. -40 to 85 C Min. 0.65VCCB 0.65VCCB 1.6 2.0 0.35VCCB 0.35VCCB 0.35VCCB 0.7 0.8 1.3 1.6 2.2 1.7 1.44 1.5 1.25 0.1 0.2 0.55 0.35 0.39 0.20 0.15 0.5 0.5 0.1 0.2 0.55 0.35 0.39 0.20 0.15 5 5 A A V V V V Max. Unit
VCCA (V)
(1)
1.4 VIHB High level input voltage (B1-B2) 1.8 2.5 3.3 1.4 VILB Low level input voltage (B1-B2) 1.8 2.5 3.3 1.4 1.8 High level output voltage (B3B4) 2.75 2.75 2.3 1.65 1.4 1.4 1.8 Low level output voltage (B3B4) 2.75 2.75 2.3 1.65 1.4 Input leakage current (B1B2) 2.7 1.4 3.6 2.7 1.4 to 3.6V 1.4 to 3.6V IO=-100A IO=-100A IO=-24mA IO=-18mA IO=-4mA IO=-4mA IO=-2mA IO=100A IO=100A IO=24mA IO=18mA IO=4mA IO=4mA IO=2mA VIB=VCCB or GND VIB=3.6V or GND 1.4 to 3.6V 1.4 to 3.6V
0.65VCCB 1.6 2.0
0.35VCCB 0.7 0.8 1.3 1.6 2.2 1.7 1.44 1.5 1.25
VOHB
VOLB
IIB
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Electrical characteristics Table 7. DC Specification for VCCB
Test condition Symbol Parameter VCCB (V)
(1)
ST4G3235
Value TA = 25 C Min. Typ. Max. -40 to 85 C Min. Max. Unit
VCCA (V)
(1)
IOFF
Power off leakage current
0
0
VIB=GND to 3.6V VOA=GND to 3.6V VIA=GND to 3.6V VOB=GND to 3.6V VIA =VCCA or GND VIB =VCCB or GND VIB =VCCB 0.6V VIB =VCCB or GND VIB =VCCA or GND
1.0
10
A
ICCtB
Quiescent supply current
1.4 to 3.6V 2.7 1.95 1.95
1.4 to 3.6V 3.6 3.6 2.7
0.5
5
A
ICCtB
Maximum quiescent supply current / Input (Bn)
0.75
mA
1. VCC range = 3.30.3; 2.50.2V; 1.80.15V
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ST4G3235
Electrical characteristics
Table 8. Dynamic switching characteristics
Test condition Symbol Parameter VCCB (V) 1.4 VOLPA Dynamic low level Quiet An Output 1.4-1.8 1.8-2.5 1.4 VOLVA Dynamic low level Quiet An Output 1.4-1.8 1.8-2.5 1.4 VOHVA Dynamic high level Quiet An Output 1.4-1.8 1.8-2.5 1.4 VOLPB Dynamic low level Quiet Bn Output 1.8 2.5 1.4 VOLVB Dynamic low level Quiet Bn Output 1.8 2.5 1.4 VOHVB Dynamic high level Quiet Bn Output 1.8 2.5 VCCA (V) 1.8 2.5 3.3 1.8 2.5 3.3 1.8 2.5 3.3 1.8-2.5 2.5-3.3 3.3 1.8-2.5 2.5-3.3 3.3 1.8-2.5 2.5-3.3 3.3 CL = 30pF VILA = 0V VIHA = VCCA CL = 30pF VILB = 0V VIHB = VCCB Value TA = 25 C Min. Typ. 0.2 0.25 0.35 -0.2 -0.25 -0.35 1.6 2.1 2.7 0.2 0.25 0.6 -0.2 -0.25 -0.36 1.2 1.4 1.9 V V V V V V Max. -40 to 85 C Min. Max. Unit
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Electrical characteristics Table 9. AC electrical characteristics
Test condition Symbol Parameter VCCB (V) 2.3 to 3.6 1.4 to 1.95 2.3 to 3.6 tPLH tPHL Propagation delay time Bn to An VCCA (V) 1.4 1.4 1.65 to 1.95
ST4G3235
Value -40 to 85 C Unit Min. 2.0 2.0 2.0 2.0 2.0 2.0 1.0 2.0 2.0 2.0 2.0 2.0 2.0 1.0 2.0 2.0 2.0 2.0 2.0 2.0 1.0 2.0 2.0 2.0 2.0 2.0 2.0 1.0 Max. 6.5 6.8 5.2 5.6 4.6 4.3 3.6 7.5 7.5 6.5 6.7 5.9 5.7 4.9 5.5 6.0 5.0 5.0 4.6 3.9 3.0 7.0 7.5 6.0 6.0 5.6 4.6 4.0 0.5 ns ns ns ns
1.4 to 1.95 1.65 to 1.95 CL = 10 pF 1.4 to 1.95 1.4 to 1.95 2.3 to 2.7 2.3 to 3.6 1.4 to 1.95 2.3 to 3.6 2.3 to 2.7 3.0 to 3.6 3.0 to 3.6 1.4 1.4 1.65 to 1.95
tPLH tPHL
Propagation delay time Bn to An
CL = 30 pF 1.4 to 1.95 1.65 to 1.95 RL = 500 1.4 to 1.95 2.3 to 2.7 1.4 to 1.95 2.3 to 2.7 2.3 to 3.6 1.4 to 1.95 2.3 to 3.6 3.0 to 3.6 3.0 to 3.6 1.4 1.4 1.65 to 1.95
tPLH tPHL
Propagation delay time An to Bn
1.4 to 1.95 1.65 to 1.95 CL = 10 pF 1.4 to 1.95 1.4 to 1.95 2.3 to 2.7 2.3 to 3.6 1.4 to 1.95 2.3 to 3.6 2.3 to 2.7 3.0 to 3.6 3.0 to 3.6 1.4 1.4 1.65 to 1.95
tPLH tPHL
Propagation delay time An to Bn
CL = 30 pF 1.4 to 1.95 1.65 to 1.95 RL = 500 1.4 to 1.95 2.3 to 2.7 1.4 to 1.95 2.3 to 2.7 1.8 0.15 1.8 0.15 2.5 0.2 3.0 to 3.6 3.0 to 3.6 2.5 0.2 3.3 0.3 3.3 0.3 CL = 30 pF RL = 500
tOSLH tOSHL Output to output skew time (note1, 2)
0.5 0.75
ns
Note:
1
Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switching in the same direction, either HIGH or LOW (tOSLH = | tPLHm - tPLHn|, tOSHL = | tPHLm - tPHLn| Parameter guaranteed by design
2
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ST4G3235
Electrical characteristics
Table 10. Capacitance characteristics
Test condition Symbol Parameter VCCB (V) open VCCA (V) open Value TA = 25 C -40 to 85 C Unit Max. pF pF
Min. Typ. Max. Min. 6 9 50 28 f=10MHz 22 15 28
CIN CO
Input capacitance Output capacitance
1.8-2.5 2.5-3.3 2.5 1.8 3.3 3.3 2.5 1.8 1.8
CPD
Power dissipation capacitance
1.4 1.4 3.3
pF
Note:
1
CPD is defined as the value of the IC's internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/4 (per circuit)
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Test circuit
ST4G3235
5
Test circuit
Figure 4. Test circuit
Table 11. Test circuit
Test tPLH, tPHL Switch Open
CL = 10/30pF or equivalent (includes jig and probe capacitance) RL = R1 = 500 or equivalent RT = ZOUT of pulse generator (typically 50)
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ST4G3235
Waveforms
6
Waveforms
Table 12. Waveform symbol value
Symbol 3.0 to 3.6V VIH VM VX VY VCC 1.5V VOL +0.3V VOL -0.3V VCC 2.3 to 2.7V VCC VCC/2 VOL +0.15V VOL -0.15V 1.65 to 1.95V VCC VCC/2 VOL +0.15V VOL -0.15V
Figure 5.
Waveform - propagation delay (f=1MHz; 50% duty cycle)
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Package mechanical data
ST4G3235
7
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) 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
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ST4G3235 Figure 6. Marking
Package mechanical data
Note:
E = Eco Level; Y = Assy Year; WW = Assy Week; X = Marking Area; Marking Code 9521
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Package mechanical data Table 13. Flip-Chip11 Mechical data
Dim. A A1 A2 b D D1 E E1 eD eE fD fE ccc 0.2 0.383 1.36 0.265 1.99 mm Min 0.585 0.21 Typ 0.65 0.25 0.40 0.315 2.04 1.5 1.41 0.866 0.25 0.433 0.270 0.272 0.080 0.30 0.483 7.9 15.1 1.46 53.5 0.365 2.09 10.4 78.3 Max 0.715 0.29 Min 23.0 8.3 inch Typ 25.6 9.8 15.7 12.4 80.3 59.1 55.5 34.1 9.8 17.0 10.6 10.7 3.1
ST4G3235
Max 28.1 11.4
14.4 82.3
57.5
11.8 19.0
Figure 7.
Package dimension
18/21
ST4G3235 Table 14. Flip-Chip11 tape and reel information
mm. Dim. Min A C D N T Ao Bo Ko Po P 2.29 1.65 0.76 3.9 3.9 2.34 1.70 0.81 4 4 12.8 20.2 49 50 51 12.4 2.39 1.75 0.86 4.1 4.1 0.090 0.065 0.030 0.153 0.153 Typ Max 178 13.2 0.504 0.795 1.929 Min
Package mechanical data
inch Typ
Max
6.926 0.519
1.969
2.008 0.488
0.092 0.067 0.032 0.157 0.157
0.094 0.069 0.034 0.161 0.161
Figure 8.
Reel dimensions
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Revision history
ST4G3235
8
Revision history
Table 15. Revision history
Date 14-Oct-2004 26-Oct-2004 11-Feb-2005 18-Feb-2005 30-Mar-2005 09-May-2005 14-Jun-2007 Revision 1 2 3 4 5 6 7 First release. Mechanical Data has been updated. Add Tape & Reel and Figure 6. Table 1 has been updated from 4000 to 5000 parts per Reel. Add Features ==> Max Data Rates. Table 9 and Table 10 have been updated. Document reformatted, typo Figure 2 on page 3 Changes
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ST4G3235
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