HD74LS48 BCD-to-Seven-Segment Decoder / Driver (Internal Pull-up outputs) REJ03D0411-0300 Rev.3.00 Jul.22.2005 HD74LS48 features active high outputs for driving lamp buffers. This circuit has full ripple blanking input / output controls and a lamp test input. Display patterns for BCD input counts above 9 are unique symbols to authenticate input conditions. This circuit incorporates automatic leading and / or trailing-edge zero-blanking control (RBI and RBO). Lamp test (LT) of these types may be performed at any time when the BI / RBO node is at a high level. It contains an overriding blanking input (BI) which can be used to control the lamp intensity be pulsing or to inhibit the outputs. Inputs and outputs are entirely compatible for use with TTL or DTL logic outputs. Features * Ordering Information Part Name Package Type HD74LS48P DILP-16 pin Package Code (Previous Code) PRDP0016AE-B (DP-16FV) Package Abbreviation Taping Abbreviation (Quantity) P -- Pin Arrangement B 1 C 2 Lamp Test BI/RBO 16 VCC 15 f Inputs B f 3 C g 14 g 4 LT a 13 a BI/RBO b RBI c 12 b D d 11 c A e 10 d 9 e RBI 5 D 6 Inputs A 7 GND 8 (Top view) Rev.3.00, Jul.22.2005, page 1 of 6 Outputs HD74LS48 Function Table Decimal or Function Inputs BI / RBO Outputs Note H a H b H c H d H e H f H g L H L H H L H H H H L L H L H L L L H H L H L H H H L H H H H H L L L L H H H H H L H H L H H H L L L H H H H L H H H H H L H H L H L H L H H H H H H H H L H L H L H L H X X H H L L L H H L H H H L H L H L L H L H H L H H H H X X H H L H H L H L H H L L L H H L H L L L L H H H 13 14 H H X X H H H H L H H L H H H L L L L L H H L H H H H H 15 BI H X X X H X H X H X H X H L L L L L L L L L L L L L L L 2 RBI LT H L L X L X L X L X L X L H L H L H L H L H L H L H L H 3 4 0 LT H RBI H D L C L B L A L 1 2 H H X X L L L L L H 3 4 H H X X L L L H 5 6 H H X X L L 7 8 H H X X 9 10 H H 11 12 1 H; high level, L; low level, X, irrelevant Notes: 1. The blanking input (BI) must be open or held at a high logic level when output functions 0 through 15 are desired. 2. When a low logic level is applied directly to the blanking input (BI), all segment outputs are low regardless of the level of any other input. 3. 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 low and the ripple-blanking output (RBO) goes to a low level (response condition). 4. When a 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 high. a f g e c d Rev.3.00, Jul.22.2005, page 2 of 6 b 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 HD74LS48 Block Diagram a A b B Inputs C c Outputs D d Blanking Input or Ripple Blanking Output (BI/RBO) e f Lamp Test (LT) Inputs g Ripple Blanking (RBI) Absolute Maximum Ratings Item Supply voltage Symbol VCC Ratings 7 Unit V VIN PT 7 400 V mW Input voltage Power dissipation C Storage temperature Tstg -65 to +150 Note: Voltage value, unless otherwise noted, are with respect to network ground terminal. Recommended Operating Conditions Item Symbol VCC Min 4.75 Typ 5.00 Max 5.25 Unit V Output current IOH (a to g) IOH (BI/RBO) -- -- -- -- -100 -50 A A Output current IOL (a to g) IOL (BI/RBO) -- -- -- -- 6 3.2 mA mA Topr -20 25 75 C Supply voltage Operating temperature Rev.3.00, Jul.22.2005, page 3 of 6 HD74LS48 Electrical Characteristics (Ta = -20 to +75 C) Item Input voltage a to g BI / RBO Output voltage Symbol VIH min. 2.0 typ.* -- max. -- Unit V VIL -- 2.4 -- -- 0.8 -- V V 2.4 -- -- -- -- 0.4 V -- -- -- -- 0.5 0.4 -- -1.3 -- -- 0.5 -- mA IOL = 3.2 mA VCC = 4.75 V, VO = 0.85 V, -- -- -- -- 20 -0.4 A mA VCC = 5.25 V, VI = 2.7 V VCC = 5.25 V, VI = 0.4 V -- -- -1.2 mA VCC = 5.25 V, VI = 0.4 V II -- -- 0.1 mA VCC = 5.25 V, VI = 7 V IOS -0.3 -- -2 mA VCC = 5.25 V ICC -- 25 38 mA VOH a to g VOL BI / RBO Output current** Input current a to g IO except BI / RBO IIH BI / RBO except BI / RBO Short-circuit BI / RBO output current Supply current*** IIL Input clamp voltage VIK -- -- -1.5 Notes: * VCC = 5 V, Ta = 25C ** Input condition as for VOH *** ICC is measured with all outputs open and inputs at 4.5 V. V V V Condition IOH = -100 A IOH = -50 A IOL = 2 mA IOL = 6 mA IOL = 1.6 mA VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V VCC = 5.25 V VCC = 4.75 V, IIN = -18 mA Switching Characteristics (VCC = 5 V, Ta = 25C) Item Symbol Input min. typ. max. Unit Condition Turn-on time tPHL tPLH A -- -- -- -- 100 100 ns CL = 15 pF, RL = 4 k Turn-off time tPHL tPLH RBI -- -- -- -- 100 100 ns CL = 15 pF, RL = 6 k Rev.3.00, Jul.22.2005, page 4 of 6 HD74LS48 Testing Method Test Circuit VCC 4.5V RL Output a See Testing Table A B C D Input P.G. Zout = 50 b c d e f LT RBI BI/RBO CL g Waveform tTHL tTLH Input 3V 90% 1.3 V 90% 1.3 V 10% 10% 0V tPHL tPLH VOH In phase output 1.3 V 1.3 V VOL tPHL tPLH VOH 1.3 V Out of phase output 1.3 V VOL Testing Table Item tPLH tPHL Inputs Outputs RBI 4.5 V D GND C GND B GND A IN a OUT b -- c -- d OUT e OUT f OUT g -- 4.5 V 4.5 V GND GND GND 4.5 V 4.5 V 4.5 V IN IN -- OUT -- OUT OUT -- -- OUT OUT OUT -- OUT -- OUT IN GND GND GND GND OUT OUT OUT OUT OUT OUT -- Rev.3.00, Jul.22.2005, page 5 of 6 HD74LS48 Package Dimensions JEITA Package Code P-DIP16-6.3x19.2-2.54 RENESAS Code PRDP0016AE-B Previous Code DP-16FV MASS[Typ.] 1.05g D 9 E 16 1 8 b3 0.89 Z A1 A Reference Symbol L e e bp Dimension in Millimeters Min D 19.2 E 6.3 c A1 0.51 b p 0.40 b 3 c 0.19 0 e 2.29 L 20.32 7.4 0.48 0.56 1.30 Z ( Ni/Pd/Au plating ) Max 5.06 A e1 Rev.3.00, Jul.22.2005, page 6 of 6 Nom 7.62 1 0.25 0.31 2.54 2.79 15 1.12 2.54 Sales Strategic Planning Div. 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