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PDF ST1G3234B Data sheet ( Hoja de datos )
| Número de pieza | ST1G3234B | |
| Descripción | 1-bit dual supply bus buffer level translator | |
| Fabricantes | STMicroelectronics | |
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ST1G3234B
1-bit dual supply bus buffer level translator
with A-side series resistor
Features
■ High speed: tPD = 4.0 ns (max.) at TA = 85 °C
VCCB = 1.65 V; VCCA = 3.0 V
■ Low power dissipation:
ICCA = ICCB = 5 μA (max.) at TA = 85 °C
■ Symmetrical output impedance:
|IOHA| = IOLA = 10 mA min at
VCCA = 2.75 V; VCCB = 1.4 to 3.6 V
|IOHA| = IOLA = 6 mA min. at
VCCA = 2.3 V; VCCB = 1.4 to 3.6 V
■ Balanced propagation delays:
tPLH ≅ tPHL
■ Power-down protection on inputs and outputs
■ 26 Ω series resistor on A-side outputs
■ Operating voltage range:
– VCCA (opr.) = 1.4 to 3.6 V
– VCCB (opr.) = 1.4 to 3.6 V
■ Allows partial power-down when VCCA = 0,
device consumes very low quiescent current
■ Max data rates:
– 380 Mbps (1.8 to 3.3 V translation)
– 260 Mbps (<1.8 to 3.3 V translation)
– 260 Mbps (translates to 2.5 V)
– 210 Mbps (translates to 1.5 V)
■ Latch-up performance exceeds 500 mA
(JESD 17)
■ ESD performance:
HBM > 2000 V (MIL STD 883 method 3015);
MM > 200 V
■ ROHS compliant to Flip-Chip package
Flip-Chip 5
Description
The ST1G3234B 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 3.3 V bus and a 2.5 V or
1.8 V bus in a mixed 3.3 V/1.8 V, 3.3 V/2.5 V,
1.8 V/1.4 V and 2.5 V/1.8 V supply systems, it
achieves high speed operation while maintaining
the CMOS low power dissipation.
The ST1G3234B 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.
The ST1G3234B is VCCA = 0 V tolerant, achieving
very low current consumption when the VCCA is
grounded.
Table 1. Device summary
Order code
Package
Comments
ST1G3234BBJR
Flip-Chip 5
4000 parts per reel
December 2007
Rev 2
1/17
www.st.com
17
1 page  
ST1G3234B
3 Maximum rating
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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.
Symbol
Absolute maximum ratings
Parameter
VCCA
VCCB
VOA
VIB
VOA
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
DC input voltage
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)
Value
-0.5 to +4.6
-0.5 to + 4.6
-0.5 to +4.6
Unit
V
V
V
-0.5 to +4.6
-0.5 to VCCA + 0.5
-0.5 to + 4.6
−20
−50
± 50
± 100
± 100
200
-65 to +150
260
V
V
V
mA
mA
mA
mA
mA
mW
°C
°C
5/17
5 Page 
ST1G3234B
6 Waveforms
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Table 10. Waveform symbol value
Symbol
3.0 to 3.6 V
VCC
2.3 to 2.7 V
1.65 to 1.95 V
VIH
VCC
VCC
VCC
VM
1.5 V
VCC/2
VCC/2
Figure 5. Waveform - propagation delay (f = 1 MHz; 50 % duty cycle)
2.0ns
2.0ns
A1 90%
B1 VM
VM
VIH
10% OV
t PHL
t PHL
A1 90%
VOH
B1 VM VM
10% VOL
CS21770A
11/17
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet ST1G3234B.PDF ] | |
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