This part is a kind of semiconductor called AV2040.

Function of this product has 20x4 Character.

Manufacturers : ANAG VISION

Image and pinout :

Some of the text within the PDF file :

ANAG VISION ° ° ° ° ° 5x7 dots with cursor 1/16 duty Controller (KS0066 or Equvivalent) built in +5V single supply (+3V also available) B/L driven by pin1 and 2 or 15 and 16 or A,K Absolute Maximum Rating Function Gnd, 0V +5V (opt. 3V) LCD Drive Function Select Read/Write Enable Signal Data Bus Line 4.2V for LED Power Supply for LED 0V AV2040 20x4 Character Pin Assignment No. 1 2 3 4 5 6 7-14 15 16 Symbol Vss Vdd Vee RS R/W E DB0-DB7 A K Item V-Module V-Input Vss=0V, Vdd=5.0V Symbol Vdd-Vss VI Standard Value min. -0.3 -0.3 typ. - max. 7.0 Vdd Unit V V Electronical Characteristics Item Input Voltage Supply Curent Symbol Condit. Vdd Idd Vdd=+5V Vdd=+3V Vdd=+5V -20 °C Standard Value min. typ. max. 4.7 2.7 4.6 4.1 3.9 5.0 3.0 1.6 --4.8 4.5 4.2 --4.2 280 --5.3 [ ... ]

AV2040 PDF Datasheet Download