Datasheet 7447

Datasheet 7447

• 1.
  TL F 6518 DM7446ADM5447ADM7447ABCDto7-SegmentDecodersDrivers June1989 DM7446A DM5447A DM7447A BCD to 7-Segment Decoders Drivers General Description The 46A and 47A feature active-low outputs designed for driving common-anode LEDs or incandescent indicators di- rectly All of the circuits have full ripple-blanking input out- put controls and a lamp test input Segment identification and resultant displays are shown on a following page Dis- play patterns for BCD input counts above nine are unique symbols to authenticate input conditions All of the circuits incorporate automatic leading and or trail- ing-edge zero-blanking control (RBI and RBO) Lamp test (LT) of these devices may be performed at any time when the BI RBO node is at a high logic level All types contain an overriding blanking input (BI) which can be used to con- trol the lamp intensity (by pulsing) or to inhibit the outputs Features Y All circuit types feature lamp intensity modulation capability Y Open-collector outputs drive indicators directly Y Lamp-test provision Y Leading trailing zero suppression Connection Diagram Dual-In-Line Package TL F 6518–1 Order Number DM5447AJ DM7446AN or DM7447AN See NS Package Number J16A or N16E C1995 National Semiconductor Corporation RRD-B30M105 Printed in U S A
• 2.
  Absolute Maximum Ratings(Note) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage 7V Input Voltage 5 5V Operating Free Air Temperature Range DM54 b55 C to a125 C DM74 0 C to a70 C Storage Temperature Range b65 C to a150 C Note The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaran- teed The device should not be operated at these limits The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the absolute maximum ratings The ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation Recommended Operating Conditions Symbol Parameter DM7446A Units Min Nom Max VCC Supply Voltage 4 75 5 5 25 V VIH High Level Input Voltage 2 V VIL Low Level Input Voltage 0 8 V VOH High Level Output Voltage (a thru g) 30 V IOH High Level Output Current (BI RBO) b0 2 mA IOL Low Level Output Current (a thru g) 40 mA IOL Low Level Output Current (BI RBO) 8 mA TA Free Air Operating Temperature 0 70 C ’46A Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units (Note 1) VI Input Clamp Voltage VCC e Min II e b12 mA b1 5 V VOH High Level Output VCC e Min 2 4 3 7 V Voltage (BI RBO) IOH e Max ICEX High Level Output VCC e Max VO e 30V 250 mA Current (a thru g) VIL e Max VIH e Min VOL Low Level Output VCC e Min IOL e Max 0 3 0 4 V Voltage VIH e Min VIL e Max II Input Current Max VCC e Max VI e 5 5V 1 mA Input Voltage (Except BI RBO) IIH High Level Input VCC e Max VI e 2 4V 40 mA Current (Except BI RBO) IIL Low Level Input VCC e Max BI RBO b4 mA Current VI e 0 4V Others b1 6 IOS Short Circuit VCC e Max (BI RBO) b4 mA Output Current ICC Supply Current VCC e Max 60 103 mA (Note 2) Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 ICC is measured with all outputs open and all inputs at 4 5V 2
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  ’46A Switching Characteristics atVCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) Symbol Parameter Conditions Min Max Units tPLH Propagation Delay Time CL e 15 pF 100 ns Low to High Level Output RL e 120X tPHL Propagation Delay Time 100 ns High to Low Level Output Recommended Operating Conditions Symbol Parameter DM5447A DM7447A Units Min Nom Max Min Nom Max VCC Supply Voltage 4 5 5 5 5 4 75 5 5 25 V VIH High Level Input Voltage 2 2 V VIL Low Level Input Voltage 0 8 0 8 V VOH High Level Output 15 15 V Voltage (a thru g) IOH High Level Output b0 2 b0 2 mA Current (BI RBO) IOL Low Level Output 40 40 mA Current (a thru g) IOL Low Level Output 8 8 mA Current (BI RBO) TA Free Air Operating Temperature b55 125 0 70 C ’47A Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units (Note 1) VI Input Clamp Voltage VCC e Min II e b12 mA b1 5 V VOH High Level Output VCC e Min 2 4 3 7 V Voltage (BI RBO) IOH e Max ICEX High Level Output VCC e Max VO e 15V 250 mA Current (a thru g) VIL e Max VIH e Min VOL Low Level Output VCC e Min IOL e Max 0 3 0 4 V Voltage VIH e Min VIL e Max II Input Current Max VCC e Max VI e 5 5V 1 mA Input Voltage IIH High Level Input Current VCC e Max VI e 2 4V 40 mA IIL Low Level Input VCC e Max BI RBO b4 mA Current VI e 0 4V Others b1 6 IOS Short Circuit VCC e Max (BI RBO) b4 mA Output Current ICC Supply Current VCC e Max DM54 60 85 mA (Note 2) DM74 60 103 Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 ICC is measured with all outputs open and all inputs at 4 5V 3
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  ’47A Switching Characteristics atVCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) Symbol Parameter Conditions Min Max Units tPLH Propagation Delay Time CL e 15 pF 100 ns Low to High Level Output RL e 120X tPHL Propagation Delay Time 100 ns High to Low Level Output Function Table 46A 47A Decimal or Inputs BI RBO Outputs Note Function LT RBI D C B A (Note 1) a b c d e f g 0 H H L L L L H L L L L L L H 1 H X L L L H H H L L H H H H 2 H X L L H L H L L H L L H L 3 H X L L H H H L L L L H H L 4 H X L H L L H H L L H H L L 5 H X L H L H H L H L L H L L 6 H X L H H L H H H L L L L L 7 H X L H H H H L L L H H H H (2) 8 H X H L L L H L L L L L L L 9 H X H L L H H L L L H H L L 10 H X H L H L H H H H L L H L 11 H X H L H H H H H L L H H L 12 H X H H L L H H L H H H L L 13 H X H H L H H L H H L H L L 14 H X H H H L H H H H L L L L 15 H X H H H H H H H H H H H H BI X X X X X X L H H H H H H H (3) RBI H L L L L L L H H H H H H H (4) LT L X X X X X H L L L L L L L (5) Note 1 BI RBO is a wire-AND logic serving as blanking input (BI) and or ripple-blanking output (RBO) Note 2 The blanking input (BI) must be open or held at a high logic level when output functions 0 through 15 are desired The ripple-blanking input (RBI) must be open or high if blanking of a decimal zero is not desired Note 3 When a low logic level is applied directly to the blanking input (BI) all segment outputs are high regardless of the level of any other input Note 4 When ripple-blanking input (RBI) and inputs A B C and D are at a low level with the lamp test input high all segment outputs go H and the ripple- blanking output (RBO) goes to a low level (response condition) Note 5 When the blanking input ripple-blanking output (BI RBO) is open or held high and a low is applied to the lamp-test input all segment outputs are L H e High level L e Low level X e Don’t Care 4
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  Logic Diagram TL F6518–2 Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number DM5447AJ NS Package Number J16A 5
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  DM7446ADM5447ADM7447ABCDto7-SegmentDecodersDrivers Physical Dimensions inches(millimeters) (Continued) 16-Lead Molded Dual-In-Line Package (N) Order Number DM7446AN or DM7447AN NS Package Number N16E LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or 2 A critical component is any component of a life systems which (a) are intended for surgical implant support device or system whose failure to perform can into the body or (b) support or sustain life and whose be reasonably expected to cause the failure of the life failure to perform when properly used in accordance support device or system or to affect its safety or with instructions for use provided in the labeling can effectiveness be reasonably expected to result in a significant injury to the user National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd Japan Ltd 1111 West Bardin Road Fax (a49) 0-180-530 85 86 13th Floor Straight Block Tel 81-043-299-2309 Arlington TX 76017 Email cnjwge tevm2 nsc com Ocean Centre 5 Canton Rd Fax 81-043-299-2408 Tel 1(800) 272-9959 Deutsch Tel (a49) 0-180-530 85 85 Tsimshatsui Kowloon Fax 1(800) 737-7018 English Tel (a49) 0-180-532 78 32 Hong Kong Fran ais Tel (a49) 0-180-532 93 58 Tel (852) 2737-1600 Italiano Tel (a49) 0-180-534 16 80 Fax (852) 2736-9960 National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications
• 7.
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