1 Features
1• AEC-Q100 Qualified with:
– Temperature Grade 3: –40°C to 85°C
– HBM ESD Classification 2
– CDM ESD Classification C4B
• 16-Channel P-Gamma, 2-Channel P-VCOM, 10-
Bit Resolution
• 16x Rewritable Nonvolatile Memory
• Two Independent Pin-Selectable Memory Banks
• Rail-to-Rail Output:
– 300-mV (Min) Swing-to-Rail (10 mA)
– > 300-mA (Max) I OUT
• Supply Voltage: 9 V to 20 V
• Digital Supply: 2 V to 5.5 V
• I2C™ Interface: Supports 400 kHz and 2.7 MHz

2 Application
TFT-LCD Reference Drivers

3 Description
The BUF16821-Q1 offers 16 programmable gamma
channels and two programmable VCOM channels. The final gamma and VCOM values can be stored in
the on-chip, nonvolatile memory. To allow for
programming errors or liquid crystal display (LCD)
panel rework, the device supports up to 16 write
operations to the on-chip memory.
The device has two separate memory banks, allowing
simultaneous storage of two different gamma curves
to facilitate switching between gamma curves. All
gamma and VCOM channels offer a rail-to-rail output
that typically swings to within 150 mV of either supply
rail with a 10-mA load. All channels are programmed
using an I2C interface that supports standard
operations up to 400 kHz and high-speed data
transfers up to 2.7 MHz.
The device is manufactured using Texas Instruments’
proprietary, state-of-the-art, high-voltage CMOS
process. This process offers very dense logic and
high supply voltage operation of up to 20 V. The
device is offered in an HTSSOP-28 PowerPAD™
package, and is specified from –40°C to +85°C.