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HT1628 Datasheet(PDF) 5 Page - Holtek Semiconductor Inc |
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HT1628 Datasheet(HTML) 5 Page - Holtek Semiconductor Inc |
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5 / 17 page  Rev. 1.00 5 December 20, 2016 HT1628 Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions IOH3 LCD Common Source Current 3V VOH=2.7V -100 -200 — μA 5V VOH=4.5V -190 -380 — μA IOL3 LCD Segment Sink Current 3V VOL=0.3V 35 70 — μA 5V VOL=0.5V 65 130 — μA IOH3 LCD Segment Source Current 3V VOH=2.7V -35 -70 — μA 5V VOH=4.5V -65 -130 — μA RPH Pull-high Resistor 3V DATA, CSB, WRB, RDB, TEST 40 100 170 kΩ 5V 20 50 90 kΩ A.C. Characteristics Ta = -40°C to +85°C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions fLCD LCD Frame Frequency 3V On-chip RC oscillator 58 90 148 Hz 5V fCLK1 Serial Data Clock (WRB pin) 3V Duty cycle 50% — — 1 MHz 5V — — 2 MHz fCLK2 Serial Data Clock (RDB pin) 3V Duty cycle 50% — — 0.5 MHz 5V — — 1 MHz tCS Serial Interface Reset Pulse Width (Figure 3) — CSB 250 300 — ns tCLK WR, RD Input Pulse Width (Figure 1) 3V Write mode 0.4 — — μs Read mode 0.8 — — 5V Write mode 0.2 — — μs Read mode 0.4 — — tr, tf Rise/Fall Time Serial Data Clock Width (Figure 1) — CO=15pF — 50 100 ns tsu Setup Time for DATA to WRB Clock Width (Figure 2) — — 50 100 — ns th Hold Time for DATA to WRB Clock Width (Figure 2) — — 100 200 — ns tsu1 Setup Time for CSB to WRB, RDB Clock Width (Figure 3) — — 200 300 — ns th1 Hold Time for CSB to WRB, RDB Clock Width (Figure 3) — — 100 200 — ns tPD DATA Output Delay Time (RDB-DATA) (Figure 4) — CO=15pF tPD=50 to 50% — 100 200 ns tPD=50 to 50% VPOR VDD Start voltage to ensure Power on reset — — — — 100 mV RRVDD VDD Rise Rate to ensure Power on reset — — 0.05 — — V/ms tPOR Minimum Time for VDD to remain at VPOR to ensure Power on reset — — 10 — — ms |
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