NTS0102 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 4 — 23 January 2013 15 of 27
NXP Semiconductors
NTS0102
Dual supply translating transceiver; open drain; auto direction sensing
14. Application information
14.1 Applications
Voltage level-translation applications. The NTS0102 can be used in point-to-point
applications to interface between devices or systems operating at different supply
voltages. The device is primarily targeted at I
2
C or 1-wire which use open-drain drivers, it
may also be used in applications where push-pull drivers are connected to the ports,
however the NTB0102 may be more suitable.
14.2 Architecture
The architecture of the NTS0102 is shown in Figure 11. The device does not require an
extra input signal to control the direction of data flow from A to B or B to A.
The NTS0102 is a "switch" type voltage translator, it employs two key circuits to enable
voltage translation:
1. A pass-gate transistor (N-channel) that ties the ports together.
2. An output edge-rate accelerator that detects and accelerates rising edges on the I/O
pins.
Fig 10. Typical operating circuit
001aam491
1.8 V
SYSTEM
CONTROLLER
3.3 V
SYSTEM
1.8 V 3.3 V
0.1 μF 0.1 μF 1 μF
V
CC(A)
OE
A1
DATA DATA
NTS0102
A2
B1
B2
V
CC(B)
Fig 11. Architecture of NTS0102 I/O cell (one channel)
001aal965
V
CC(A)
V
CC(B)
AB
10 kΩ 10 kΩ
T1
T3
T2
ONE
SHOT
ONE
SHOT
GATE BIAS
