HD404328 Datasheet, PDF (84/96 Pages) Hitachi Semiconductor – 4 BIT SINGLE CHIP MICROCOMPUTER

HD404328 Series
LCD Circuit Characteristics (HD404324, HD404326, HD404328: V_CC = 2.7 V to 6.0 V, GND = 0.0 V,
T_a = –20°C to +75°C; HD404324U, HD404326U, HD404328U: V_CC = 2.7 V to 6.0 V, GND = 0.0 V, T_a
= –40°C to +85°C; HD4074329, HD4074329U: V_CC = 2.9 V to 5.5 V, GND = 0.0 V, T_a = –20°C to
+75°C; unless otherwise specified)
Item
Symbol Pin(s)
Min
Typ Max
Unit Test Conditions
Note
Segment driver
V_DS
SEG1–SEG24
—
— 0.6
V I_d = 3.0 µA
1
voltage drop
Common driver V_DC
COM1–COM4
—
— 0.3
V I_d = 3.0 µA
1
voltage drop
LCD power supply R_W
division resistor
100
300 900
kΩ HD404324,
HD404326,
HD404328,
HD4074329:
Between V₁ and
GND,
LCD voltage
V_LCD
V₁
V₁ = V_CC
2.7
— V_CC
V HD404324,
2
HD404324U,
HD404326,
HD404326U,
HD404328,
HD404328U
2.9
— V_CC
V HD4074329,
2
HD4074329U
Notes: 1. V_DS and V_DC are the voltage drops from power supply pins V₁, V₂, and V₃, and GND to each
segment pin and each common pin.
2. When V_LCD is supplied from an external source, the following relations must be retained: V_CC ≥ V₁
≥ V₂ ≥ V₃ ≥ GND
82