Document
Ordering number : EN*3587B
CMOS LSI
LC7573N, 7573NM
1/2 Duty VFD Driver for Frequency Display
Preliminary Overview
The LC7573N and LC7573NM are 1/2 duty VFD drivers that can be used for electronic tuning frequency display and other applications under the control of a controller. These products can directly drive VFDs with up to 38 segments.
Package Dimensions
unit: mm 3061-DIP30S
[LC7573N]
Features
• 38 segment outputs • Noise reduction circuits are built into the output drivers. • Serial data input supports CCB* format communications with the system controller. • Switching between digital and analog dimmers under serial data control • High generality since display data is displayed without the intervention of a decoder • All segments can be turned off with the BLK pin
SANYO: DIP30S • CCB is a trademark of SANYO ELECTRIC CO., LTD. • CCB is SANYO’s original bus format and all the bus addresses are controlled by SANYO.
unit: mm 3073A-MFP30S
[LC7573NM]
Pin Assignment
SANYO: MFP30S
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
O2095HA (OT)/3242JN No.3587-1/10
LC7573N, 7573NM
Specifications
Absolute Maximum Ratings at Ta = 25°C, VSS = 0 V
Parameter Maximum supply voltage Symbol VDD max VFL max VIN1 VIN2 VOUT1 VOUT2 IOUT1 IOUT2 Pd max Topr Tstg VDD VFL DI, CL, CE, BLK, DIM OSC S1 to S19, G1, G2 OSC S1 to S19 G1, G2 Ta = 85°C Conditions Ratings –0.3 to +6.5 –0.3 to +21.0 –0.3 to +6.5 –0.3 to VDD + 0.3 –0.3 to VFL + 0.3 –0.3 to VDD + 0.3 5 30 150 –40 to +85 –50 to +125 Unit V V V V V V mA mA mW °C °C
Input voltage
Output voltage
Output current Allowable power dissipation Operating temperature Storage temperature
Allowable Operating Ranges at Ta = –40 to +85°C, VDD = 4.5 to 5.5 V, VSS = 0 V
Parameter Supply voltage Input high level voltage Input low level voltage Guaranteed oscillator range Recommended external resistance Recommended external capacitance Low level clock pulse width High level clock pulse width Data setup time Data hold time CE wait time CE setup time CE hold time BLK switching time Input voltage range Symbol VDD VFL VIH VIL fOSC ROSC COSC tøL tøH tds tdh tcp tcs tch tc VIN VDD VFL DI, CL, CE, BLK DI, CL, CE, BLK OSC OSC OSC CL: Figure 1 CL: Figure 1 DI, CL: Figure 1 DI, CL: Figure 1 CE, CL: Figure 1 CE, CL: Figure 1 CE, CL: Figure 1 BLK, CE: Figure 3 DIM 0.5 0.5 0.5 0.5 0.5 0.5 0.5 10 0 +5.5 Conditions min 4.5 8 0.8 VDD 0 0.4 1.6 12 50 typ 5.0 12 max 5.5 18 5.5 0.2 VDD 3.0 Unit V V V V MHz kΩ pF µs µs µs µs µs µs µs µs V
Electrical Characteristics in the Allowable Operating Ranges
Parameter Input high level current Input low level current Output high level voltage Output low level voltage Oscillator frequency Hysteresis voltage A/D converter linearity error Current drain Symbol IIH IIL VOH1 VOH2 VOL fOSC VH Err IDD Conditions DI, CL, CE, BLK, DIM: VI = 5.5 V DI, CL, CE, BLK, DIM: VI = 0 V S1 to S19: IO = 2 mA G1, G2: IO = 25 mA S1 .