TSC20461 Datasheet – 4-Wire Touch Screen Controller
Low-Voltage I/O 4-Wire Touch Screen Controller
TSC20461 overview
The TSC20461 is a Low-Voltage I/O 4-Wire Touch Screen Controller made by Burr Brown, supplied in these packages: TSSOP, QFN 16 Pin, VFBGA Type. The absolute maximum ratings table on this page lists the 8 limits from the manufacturer's datasheet that must not be exceeded. This page brings together the TSC20461 pinout and maximum ratings, with the full datasheet PDF to preview below or download.
The TSC2046 is a next-generation version to the ADS7846 4-wire touch screen controller which supports a low-voltage I/O interface from 1.5V to 5.25V. The TSC2046 is 100% pin-compatible with the existing ADS7846, and will drop into the same socket. This allows for easy upgrade of current applications to the new version. The TSC2046 also has an on-chip 2.5V reference that can be used for the auxiliary input, battery monitor, and temperature measurement modes. The reference can also be powered down when not used to conserve power. The internal reference operates down to 2.7V supply voltage, while monitoring the battery voltage from 0V to 6V.
The low power consumption of < 0.75mW typ at 2.7V (reference off), high-speed (up to 125kHz sample rate), and on-chip drivers make the TSC2046 an ideal choice for battery-operated systems such as personal digital assistants (PDAs) with resistive touch screens, pagers, cellular phones, and other portable equipment. The TSC2046 is available in TSSOP-16, QFN-16, and VFBGA-48 packages and is specified over the –40°C to +85°C temperature range.
Datasheet
TSC20461 features
- SAME PINOUT AS ADS7846
- 2.2V TO 5.25V OPERATION
- 1.5V TO 5.25V DIGITAL I/O
- INTERNAL 2.5V REFERENCE
- DIRECT BATTERY MEASUREMENT (0V TO 6V)
- ON-CHIP TEMPERATURE MEASUREMENT
- TOUCH-PRESSURE MEASUREMENT
- QSPIä AND SPIä 3-WIRE INTERFACE
- AUTO POWER-DOWN
- AVAILABLE IN TSSOP-16, QFN-16, AND VFBGA-48 PACKAGES
TSC20461 pinout
| Name | Description |
|---|---|
| 1 | Power Supply |
| 2 | X+ Position Input |
| 3 | Y+ Position Input |
| 4 | X− Position Input |
| 5 | Y− Position Input |
| 6 | Ground |
| 7 | Battery Monitor Input |
| 8 | Auxiliary Input to ADC |
| 9 | Voltage Reference Input/Output |
| 10 | Digital I/O Power Supply |
| 11 | Pen Interrupt |
| 12 | Serial Data Output. Data are shifted on the falling edge of DCLK. This output is high impedance when CS is high. |
| 13 | Busy Output. This output is high impedance when CS is high. |
| 14 | Serial Data Input. If CS is low, data are latched on the rising edge of DCLK. |
| 15 | Chip Select Input. Controls conversion timing and enables the serial input/output register. CS high = power-down mode (ADC only). |
| 16 | External Clock Input. This clock runs the SAR conversion process and synchronizes serial data I/O. |
Absolute maximum ratings
| Parameter | Value |
|---|---|
| +VCC and IOVDD to GND | −0.3V to +6V |
| Analog Inputs to GND | −0.3V to +VCC + 0.3V |
| Digital Inputs to GND | −0.3V to IOVDD + 0.3V |
| Power Dissipation | 250mW |
| Maximum Junction Temperature | +150°C |
| Operating Temperature Range | −40°C to +85°C |
| Storage Temperature Range | −65°C to +150°C |
| Lead Temperature (soldering, 10s) | +300°C |
TSC20461 applications
- PERSONAL DIGITAL ASSISTANTS
- PORTABLE INSTRUMENTS
- POINT-OF-SALE TERMINALS
- PAGERS
- TOUCH SCREEN MONITORS
- CELLULAR PHONES
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