ST1G3234B Datasheet, PDF (1/17 Pages) STMicroelectronics – 1-bit dual supply bus buffer level translator with A-side series resistor

ST1G3234B
1-bit dual supply bus buffer level translator
with A-side series resistor
Features
■ High speed: t_PD = 4.0 ns (max.) at T_A = 85 °C
V_CCB = 1.65 V; V_CCA = 3.0 V
■ Low power dissipation:
I_CCA = I_CCB = 5 μA (max.) at T_A = 85 °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 ≅ t_PHL
■ Power-down protection on inputs and outputs
■ 26 Ω series resistor on A-side outputs
■ Operating voltage range:
– V_CCA (opr.) = 1.4 to 3.6 V
– 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:
– 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
■ R_OHS 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 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.
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