1. General description
The Gunning Transceiver Logic - Transceiver Voltage Clamps (GTL-TVC) provide
high-speed voltage translation with low ON-state resistance and minimal propagation
delay. The GTL2002 provides 2 NMOS pass transistors (Sn and Dn) with a common gate
(GREF) and a reference transistor (SREF and DREF). The device allows bidirectional
voltage translations between 1.0 V and 5.0 V without use of a direction pin.
When the Sn or Dn port is LOW the clamp is in the ON-state and a low resistance
connection exists between the Sn and Dn ports. Assuming the higher voltage is on the Dn
port, when the Dn port is HIGH, the voltage on the Sn port is limited to the voltage set by
the reference transistor (SREF). When the Sn port is HIGH, the Dn port is pulled to V
CC
by
the pull-up resistors. This functionality allows a seamless translation between higher and
lower voltages selected by the user, without the need for directional control.
All transistors have the same electrical characteristics and there is minimal deviation from
one output to another in voltage or propagation delay. This is a benefit over discrete
transistor voltage translation solutions, since the fabrication of the transistors is
symmetrical. Because all transistors in the device are identical, SREF and DREF can be
located on any of the other two matched Sn/Dn transistors, allowing for easier board
layout. The translator's transistors provide excellent ESD protection to lower voltage
devices and at the same time protect less ESD-resistant devices.
2. Features and benefits
2-bit bidirectional low voltage translator
Allows voltage level translation between 1.0V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and 5V
buses, which allows direct interface with GTL, GTL+, LVTTL/TTL and 5 V CMOS
levels
Provides bidirectional voltage translation with no direction pin
Low 6.5 ON-state resistance (R
on
) between input and output pins (Sn/Dn)
Supports hot insertion
No power supply required; will not latch up
5 V tolerant inputs
Low standby current
Flow-through pinout for ease of printed-circuit board trace routing
ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per
JESD22-C101
Packages offered: SO8, TSSOP8 (MSOP8), VSSOP8, XQFN8
GTL2002
2-bit bidirectional low voltage translator
Rev. 8 — 19 August 2013 Product data sheet
