HD44780U Datasheet, PDF (54/59 Pages) Hitachi Semiconductor – Dot Matrix Liquid Crystal Display Controller/Driver

HD44780U
Electrical Characteristics Notes
1. All voltage values are referred to GND = 0 V.
V_CC
V1
A
V5
B
A = V_CC –V5
B = V_CC –V1
A ≥ 1.5 V
B ≤ 0.25 × A
The conditions of V1 and V5 voltages are for proper
operation of the LSI and not for the LCD output level.
The LCD drive voltage condition for the LCD output
level is specified as LCD voltage VLCD.
2. V_CC ≥ V1 ≥ V2 ≥ V3 ≥ V4 ≥ V5 must be maintained.
3. For die products, specified at 75°C.
4. For die products, specified by the die shipment specification.
5. The following four circuits are I/O pin configurations except for liquid crystal display output.
Input pin
Pin: E (MOS without pull-up)
Pins: RS, R/W (MOS with pull-up)
V_CC
V_CC
Output pin
Pins: CL1, CL2, M, D
V_CC
PMOS
PMOS
PMOS
PMOS
NMOS
(pull up MOS)
NMOS
NMOS
I/O Pin
Pins: DB0 –DB7
V_CC
(MOS with pull-up)
(pull-up MOS)
V_CC
PMOS
(input circuit)
PMOS
Input enable
NMOS
V_CC
NMOS
PMOS
NMOS
(output circuit)
(tristate)
Output enable
Data
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