ST1G3234 Datasheet PDF - STMicroelectronics


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ST1G3234
STMicroelectronics

Part Number ST1G3234
Description 1-bit dual supply bus buffer level translator
Page 15 Pages

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ST1G3234
1-bit dual supply bus buffer level translator
with A-side series resistor
Features
High speed: tPD = 4.4ns (Max.) at TA = 85°C
VCCB = 1.65V; VCCA = 3.0V
Low power dissipation:
ICCA = ICCB = 5µA(Max.) at TA = 85°C
Symmetrical output impedance:
|IOHA| = IOLA = 10mA Min at
VCCA = 2.75V; VCCB = 1.4V to 3.6V
|IOHA| = IOLA = 6mA Min at
VCCA = 2.3V; VCCB = 1.4V to 3.6V
Balanced propagation delays:
tPLH tPHL
Power down protection on inputs and outputs
26series resistor on A-side outputs
– Operating voltage range:
VCCA(Opr) = 1.4V to 3.6V (1.2V data
retent)
VCCB(Opr) = 1.4V to 3.6V (1.2V data
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
ROHS compliant for Flip-Chip package
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 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.
All inputs are equipped with protection circuits
against static discharge, giving them ESD
immunity and transient excess voltage.
Order codes
Part number
ST1G3234BJR
August 2006
Package
Flip-Chip 5
Rev 6
Comments
4000 parts per reel
1/15
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Contents
Contents
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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
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ST1G3234
1 Pin settings
1.1 Pin connection
Figure 1. Pin connection (top through view)
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1.2 Pin description
Table 1. Pin description
Pin N°
A1
C1
B2
A3
C3
Symbol
A1
B1
GND
VCCA
VCCB
Name and function
Data output (VCCA referred)
Data input (VCCB referred)
Ground (0V)
Positive supply voltage
Positive supply voltage
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Device summary
2 Device summary
Figure 2. Input equivalent circuit
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Figure 3. Logic diagram
Table 2. Truth table
Inputs B1 (VCCB Referred)
L
H
Outputs A1 (VCCA Referred)
L
H
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