Datasheet

NTS0101 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 5 — 11 August 2014 13 of 23
NXP Semiconductors
NTS0101
Dual supply translating transceiver; open drain; auto direction sensing
14. Application information
14.1 Applications
Voltage level-translation applications. The NTS0101 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 NTB0101 may be more suitable.
14.2 Architecture
The architecture of the NTS0101 is shown in Figure 9. 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 NTS0101 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 8. Typical operating circuit
001aan322
OE
NTS0101 SYSTEM
A DATAB
V
CC(A)
V
CC(B)
SYSTEM
CONTROLLER
DATA
1.8 V
1.8 V 3.3 V
0.1 μF 0.1 μF 1 μF
3.3 V
Fig 9. Architecture of NTS0101 I/O cel
001aal965
V
CC(A)
V
CC(B)
AB
10 kΩ 10 kΩ
T1
T3
T2
ONE
SHOT
ONE
SHOT
GATE BIAS