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TC74VHC123AFT Dataheets PDF



Part Number TC74VHC123AFT
Manufacturers Toshiba
Logo Toshiba
Description DUAL MONOSTABLE MULTIVIBRATOR
Datasheet TC74VHC123AFT DatasheetTC74VHC123AFT Datasheet (PDF)

TC74VHC123,221AF/AFN/AFT/AFK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74VHC123AF,TC74VHC123AFN,TC74VHC123AFT,TC74VHC123AFK TC74VHC221AF,TC74VHC221AFN,TC74VHC221AFT,TC74VHC221AFK Dual Monostable Multivibrator TC74VHC123AF/AFN/AFT/AFK Retriggerble TC74VHC221AF/AFN/AFT/AFK Non-Retriggerble Note: xxxFN (JEDEC SOP) is not available in Japan. TC74VHC123AF, TC74VHC221AF The TC74VHC123A/221A are high speed CMOS MONOSTABLE MULTIVIBRATOR fabricated with silicon gate C2MOS technology.

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TC74VHC123,221AF/AFN/AFT/AFK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74VHC123AF,TC74VHC123AFN,TC74VHC123AFT,TC74VHC123AFK TC74VHC221AF,TC74VHC221AFN,TC74VHC221AFT,TC74VHC221AFK Dual Monostable Multivibrator TC74VHC123AF/AFN/AFT/AFK Retriggerble TC74VHC221AF/AFN/AFT/AFK Non-Retriggerble Note: xxxFN (JEDEC SOP) is not available in Japan. TC74VHC123AF, TC74VHC221AF The TC74VHC123A/221A are high speed CMOS MONOSTABLE MULTIVIBRATOR fabricated with silicon gate C2MOS technology. There are two trigger inputs, A input (negative edge), and B input (positive edge). These inputs are valid for a slow rise/fall time signal (tr = tf = 1 s) as they are schmitt trigger inputs. This device may also be triggered by using CLR input (positive edge). After triggering, the output stays in a MONOSTABLE state for a time period determined by the external resistor and capacitor (RX, CX). A low level at the CLR input breaks this state. Limits for CX and RX are: External capacitor, CX: No limit External resistor, RX: VCC = 2.0 V more than 5 kΩ VCC ≥ 3.0 V more than 1 kΩ An input protection circuit ensures that 0 to 5.5 V can be applied to the input pins without regard to the supply voltage. This device can be used to interface 5 V to 3 V systems and two supply systems such as battery back up. This circuit prevents device destruction due to mismatched supply and input voltages. Features • High speed: tpd = 8.1 ns (typ.) at VCC = 5 V • Low power dissipation Standby state: 4 μA (max) at Ta = 25°C Active state: 600 μA (max) at Ta = 25°C • High noise immunity: VNIH = VNIL = 28% VCC (min) • Power down protection is equipped with all inputs. • Balanced propagation delays: tpLH ∼− tpHL • Wide operating voltage range: VCC (opr) = 2 to 5.5 V • Pin and function compatible with 74HC123A/221A TC74VHC123AFN, TC74VHC221AFN TC74VHC123AFT, TC74VHC221AFT TC74VHC123AFK, TC74VHC221AFK Weight SOP16-P-300-1.27A SOL16-P-150-1.27 TSSOP16-P-0044-0.65A VSSOP16-P-0030-0.50 : 0.18 g (typ.) : 0.13 g (typ.) : 0.06 g (typ.) : 0.02 g (typ.) 1 2007-10-19 Pin Assignment 1A 1 1B 2 1CLR 3 1Q 4 2Q 5 2CX 6 2RX/CX 7 GND 8 (top view) IEC Logic Symbol 16 VCC 15 1RX/CX 14 1CX 13 1Q 12 2Q 11 2CLR 10 2B 9 2A 1A (1) 1B (2) 1CLR 1CX 1RX/CX 2A 2B (3) (14) (15) (9) (10) 2CLR 2CX 2RX/CX (11) (6) (7) TC74VHC123A & R CX RX/CX & R CX RX/CX (13) 1Q (4) 1Q (5) 2Q (12) 2Q Truth Table Inputs A B CLR HH XLH HXH LH LH XXL X: Don’t care Outputs QQ LH LH LH Function Output Enable Inhibit Inhibit Output Enable Output Enable Reset TC74VHC123,221AF/AFN/AFT/AFK 1A (1) 1B (2) 1CLR 1CX 1RX/CX 2A 2B (3) (14) (15) (9) (10) 2CLR 2CX 2RX/CX (11) (6) (7) TC74VHC221A &1 R CX RX/CX & 1 R CX RX/CX (13) 1Q (4) 1Q (5) 2Q (12) 2Q 2 2007-10-19 Block Diagram (Note 1) (Note 2) TC74VHC123,221AF/AFN/AFT/AFK A B 1 2 DX CX 14 15 RX VCC CX RX/CX 13 Q 3 CLR 4Q A B 9 10 DX CX 67 RX VCC CX RX/CX 5 Q 11 CLR 12 Q Note 1: CX, RX, DX are external Capacitor, resistor, and diode, respectiv.


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