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ST1G3234B Datasheet

  • ST1G3234B

  • 1-bit dual supply bus buffer level translator with A-side se...

  • 17頁(yè)

  • STMICROELECTRONICS   STMICROELECTRONICS

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ST1G3234B
1-bit dual supply bus buffer level translator
with A-side series resistor
Features
鈻?/div>
鈻?/div>
鈻?/div>
High speed: t
PD
= 4.0 ns (max.) at T
A
= 85 擄C
V
CCB
= 1.65 V; V
CCA
= 3.0 V
Low power dissipation:
I
CCA
= I
CCB
= 5
渭A
(max.) at T
A
= 85 擄C
Symmetrical output impedance:
|I
OHA
| = I
OLA
= 10 mA min at
V
CCA
= 2.75 V; V
CCB
= 1.4 to 3.6 V
|I
OHA
| = I
OLA
= 6 mA min. at
V
CCA
= 2.3 V; V
CCB
= 1.4 to 3.6 V
Balanced propagation delays:
t
PLH
鈮?/div>
t
PHL
Power-down protection on inputs and outputs
26
惟
series resistor on A-side outputs
Operating voltage range:
鈥?V
CCA
(opr.) = 1.4 to 3.6 V
鈥?V
CCB
(opr.) = 1.4 to 3.6 V
Allows partial power-down when V
CCA
= 0,
device consumes very low quiescent current
Max data rates:
鈥?380 Mbps (1.8 to 3.3 V translation)
鈥?260 Mbps (<1.8 to 3.3 V translation)
鈥?260 Mbps (translates to 2.5 V)
鈥?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
R
O
HS compliant to Flip-Chip package
Flip-Chip 5
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
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 C
2
MOS 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 V
CCB
compatible signals and greater signals than V
CCB
up/down to V
CCA
. All inputs are equipped with
protection circuits against static discharge, giving
them ESD immunity and transient excess voltage.
The ST1G3234B is V
CCA
= 0 V tolerant, achieving
very low current consumption when the V
CCA
is
grounded.
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
Table 1.
Device summary
Order code
ST1G3234BBJR
Package
Flip-Chip 5
Comments
4000 parts per reel
December 2007
Rev 2
1/17
www.st.com
17

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