MM5450 MICREL | Alldatasheet

Document overview

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Technical content

Features

  • Continuous brightness control
  • Serial data input
  • No load signal requirement
  • Enable (on MM5450)
  • Wide power supply operation
  • TTL compatibility
  • 34 or 35 outputs, 15mA capability
  • Alphanumeric capability 870 01 Figure 1.

35 OUTPUT BUFFERS

35 LATCHES

(only available in die form) SERIAL DATA 22 CLOC K 21 DATA ENABLE/OUT 35 (See Note 1) 20 24 OUT 34 OUT 1 BRIGHTNESS CONTRO L VDD Note 1: Pin 23 is Data Enable in MM5450 Pin 23 is Output 35 in MM5451 Block Diagram Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

Ordering Information

Part Number Junction Temp. Range Package MM5450BN –40°C to +85°C 40-pin Plastic DIP MM5451BN –40°C to +85°C 40-pin Plastic DIP MM5450BV –40°C to +85°C 44-pin PLCC MM5451BV –40°C to +85°C 44-pin PLCC

Connection Diagram: Plastic Leaded Chip Carrier Figure 4a, 4b. V SS OUTPUT BIT 14 OUTPUT BIT 15 OUTPUT BIT 16 OUTPUT BIT 17 OUTPUT BIT 13 OUTPUT BIT 23 NC 6 44 43 42 41 40 NC OUTPUT BIT 18 OUTPUT BIT 19 OUTPUT BIT 20 OUTPUT BIT 21 2221201918 24 25 26 27 28 OUTPUT BIT 22 MM5450BV V SS OUTPUT BIT 14 OUTPUT BIT 15 OUTPUT BIT 16 OUTPUT BIT 17 OUTPUT BIT 13 OUTPUT BIT 12 OUTPUT BIT 11 OUTPUT BIT 10 OUTPUT BIT 9 OUTPUT BIT 8 OUTPUT BIT 7 OUTPUT BIT 6 OUTPUT BIT 5 OUTPUT BIT 4 OUTPUT BIT 23 OUTPUT BIT 24 OUTPUT BIT 25 OUTPUT BIT 26 OUTPUT BIT 27 NC OUTPUT BIT 28 OUTPUT BIT 29 OUTPUT BIT 30 OUTPUT BIT 31 OUTPUT BIT 32 NC 6 44 43 42 41 40 NC OUTPUT BIT 18 OUTPUT BIT 19 OUTPUT BIT 20 OUTPUT BIT 21 OUTPUT BIT 3 OUTPUT BIT 2 OUTPUT BIT 1 BRIGHTNESS CONTROL NC CLOCK IN DATA IN DATA ENABLE OUTPUT BIT 34 OUTPUT BIT 33 232221201918 24 25 26 27 28 OUTPUT BIT 22 V DD

Power Dissipation (PD ) Operating Ratings

Electrical Characteristics

4.5V ≤ VDD ≤ 11V, VSS = 0V; TA = 25°C, bold values indicate –40°C ≤ TA ≤ +85°C; unless noted Symbol Parameter Condition Min Typ Max Units Power Supply Current –25°C to +85°C, excluding output loads 8.5 mA –40°C to +85°C, excluding output loads 10 mA Data Input Voltage VL logic-0 level, ±10µA input bias –0.3 0.8 V VH logic-1 level, 4.75V ≤ VDD ≤ 5.25V 2.2 V DD V VDD > 5.25V VDD –2 V DD V Brightness Control Input CurrentNote 2 0 0.75 mA Output Sink Current segment off, V OUT = 3.0V 10 µA segment on, VOUT = 1.0V, Note 3 brightness input = 0µA 01 0 µA brightness input = 100µA 2.0 2.7 4 mA brightness input = 750µA 15 25 mA Brightness Control Input Voltage input current = 750µA 3.0 4.3 V Output Matching Note 1 ±20 % fC Clock Input Frequency Notes 5, 6 500 kHz tH Clock Input High Time Notes 5, 6 950 ns tL Clock Input Low Time Notes 5, 6 950 ns tDS Data Input Setup Time 300 ns tDH Data Input Hold Time 300 ns tDES Data Enable Input Setup Time 100 ns Reset Pad Current die 8 µA Note 1: Output matching is calculated as the percent variation (IMAX + IMIN ) ÷ 2. Note 2: With a fixed resistor on the brightness input pin, some variation in brightness will occur among devices. Maximum brightness control input current can be 2mA providing it complies with Note 3 and the junction temperature equation. Note 3: See Figures 7, 8 and 9 for recommended operating conditions and limits. Absolute maximum for each output should be limited to 40mA. Note 4: VOUT should be regulated by the user. See Figures 8 and 9 for allowable VOUT vs. IOUT operation. Note 5: AC input waveform specification for test purpose: tR ≤ 20ns, tF ≤ 20ns, f = 500kHz, 50% ±10% duty cycle. Note 6: Clock input rise and fall times must not exceed 300ns.

Figure 10. Typical Application of Constant Current Figure 11. Brightness Control Varying the Duty Cycle Figure 7. Figure 8.

20 SEG

30 SEGM

34 SEGM

34 SEGMENTS

MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB http://www.micrel.com This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. © 2000 Micrel Incorporated

Package Information

2.040 .100 .150 .075 .125 MIN .018 TYP .060 ± .002 .100 TYP .020 MIN .010 .625±.025 105°/90° .030 NOM .546 ±.010 .080 NOM 40-Pin Plastic DIP (N) TOP VIEW 0.690 ±0.005 0.652 .610 ±.015

0.050 TYP

0.045 0.045 0.094 0.015

0.137 TYP

0.125 DIA x 0.005 DEEP

4 PLCS (EJECTOR PIN)

BOTTOM VIEW 0.045 0.045 0.035 R ±0.010

0.062 DIA

x 0.020 DEEP DETAIL A

0.020 MIN

0.104 0.172 DETAIL A 0.062 TYP 0.030 TYP 0.018 0.104 0.028 SIDE VIEW 44-Pin PLCC (V)