74HC257; 74HCT257. Quad 2-input multiplexer; 3-state

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1 Product data sheet 1. General description 2. Features The is a high-speed Si-gate CMOS device and is pin compatible with Low-power Schottky TTL (LSTTL). The has four identical 2-input multiplexers with 3-state outputs, which select 4 bits of data from two sources and are controlled by a common data select input (S). The data inputs from source 0 (1I0 to 4I0) are selected when input S is LOW and the data inputs from source 1 (1I1 to 4I1) are selected when S is HIGH. Data appears at the outputs (1Y to 4Y) in true (non-inverting) form from the selected inputs. The is the logic implementation of a 4-pole, 2-position switch, where the position of the switch is determined by the logic levels applied to S. The outputs are forced to a high-impedance OFF-state when OE is HIGH. The logic equations for the outputs are: 1Y = OE ( 1I1 S + 1I0 S) 2Y = OE ( 2I1 S + 2I0 S) 3Y = OE ( 3I1 S + 3I0 S) 4Y = OE ( 4I1 S + 4I0 S) The is identical to the 74HC258 but has non-inverting (true) outputs. Non-inverting data path 3-state outputs interface directly with system bus Complies with JEDEC standard no. 7A ESD protection: HBM EIA/JESD22-A114-C exceeds 2000 V MM EIA/JESD22-A115-A exceeds 200 V Multiple package options Specified from 40 C to+85 C and from 40 C to +125 C

2 3. Quick reference data [1] C PD is used to determine the dynamic power dissipation (P D in µw). P D =C PD V CC 2 f i N+ (C L V CC 2 f o ) where: f i = input frequency in MHz; f o = output frequency in MHz; C L = output load capacitance in pf; V CC = supply voltage in V; 4. Ordering information Table 1: Quick reference data GND = 0 V; T amb =25 C; t r =t f = 6 ns. 74HC257 t PHL, t PLH propagation delay C L = 15 pf; ns ni0, ni1 to ny V CC =5 V propagation delay S to ny C L = 15 pf; ns V CC =5 V C i input capacitance pf C PD power dissipation V I = GND to V CC [1] pf capacitance (per multiplexer) 74HCT257 t PHL, t PLH propagation delay ni0, ni1 to ny propagation delay S to ny N = number of inputs switching; (C L V 2 CC f o ) = sum of outputs. C L = 15 pf; V CC =5 V C L = 15 pf; V CC =5 V ns ns C i input capacitance pf C PD power dissipation V I = GND to [1] pf capacitance (per multiplexer) V CC 1.5 V Table 2: Ordering information Type number Package Temperature range Name Description Version 74HC257N 40 C to +125 C DIP16 plastic dual in-line package; 16 SOT38-1 leads (300 mil); long body 74HC257D 40 C to +125 C SO16 plastic small outline package; 16 SOT109-1 leads; body width 3.9 mm 74HC257DB 40 C to +125 C SSOP16 plastic shrink small outline SOT338-1 package; 16 leads; body width 5.3 mm 74HC257PW 40 C to +125 C TSSOP16 plastic thin shrink small outline SOT403-1 package; 16 leads; body width 4.4 mm 74HCT257N 40 C to +125 C DIP16 plastic dual in-line package; 16 leads (300 mil); long body SOT38-1 Product data sheet 2 of 22

3 Table 2: Ordering information continued Type number Package Temperature range Name Description Version 74HCT257D 40 C to +125 C SO16 plastic small outline package; 16 leads; body width 3.9 mm 74HCT257DB 40 C to +125 C SSOP16 plastic shrink small outline package; 16 leads; body width 5.3 mm 74HCT257PW 40 C to +125 C TSSOP16 plastic thin shrink small outline package; 16 leads; body width 4.4 mm SOT109-1 SOT338-1 SOT Functional diagram G1 EN I0 1I1 2I0 2I1 3I0 3I1 4I0 4I1 OE S 1Y 2Y 3Y 4Y MUX mga aad467 Fig 1. Logic symbol Fig 2. IEC logic symbol 2 1I0 3 1I1 5 2I0 6 2I1 11 3I0 10 3I1 14 4I0 13 4I1 1 S SELECTOR 15 OE 3-STATE MULTIPLEXER OUTPUTS 1Y 2Y 3Y 4Y mgr280 Fig 3. Functional diagram Product data sheet 3 of 22

4 8. Limiting values Table 5: Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Max Unit V CC supply voltage V I IK input clamping current V I < 0.5 V or V I >V CC V - ±20 ma I OK output clamping current V O < 0.5 V or V O >V CC V [1] For DIP16 packages: above 70 C, P tot derates linearly with 12 mw/k. [2] For SO16 packages: above 70 C, P tot derates linearly with 8 mw/k. [3] For SSOP16 and TSSOP16 packages: above 60 C, P tot derates linearly with 5.5 mw/k. 9. Recommended operating conditions - ±20 ma I O output current V O = 0.5 V to V CC V - ±35 ma I CC quiescent supply current ma I GND ground current - 70 ma T stg storage temperature C P tot total power dissipation DIP16 package [1] mw SO16 package [2] mw SSOP16 package [3] mw TSSOP16 package [3] mw Table 6: Recommended operating conditions Type 74HC257 V CC supply voltage V V I input voltage 0 - V CC V V O output voltage 0 - V CC V t r, t f input rise and fall V CC = 2.0 V ns times V CC = 4.5 V ns V CC = 6.0 V ns T amb ambient temperature C Type 74HCT257 V CC supply voltage V V I input voltage 0 - V CC V V O output voltage 0 - V CC V t r, t f input rise and fall V CC = 4.5 V ns times T amb ambient temperature C Product data sheet 6 of 22

5 Table 7: Static characteristics type 74HC257 continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). V OL LOW-state output voltage V I =V IH or V IL I O =20µA; V CC = 2.0 V V I O =20µA; V CC = 4.5 V V I O =20µA; V CC = 6.0 V V I O = 6.0 ma; V CC = 4.5 V V I O = 7.8 ma; V CC = 6.0 V V I LI input leakage current V I =V CC or GND; V CC = 6.0 V - - ±1.0 µa I OZ OFF-state output current V I =V IH or V IL ; V O =V CC or GND; V CC = 6.0 V - - ±5.0 µa I CC quiescent supply current V I =V CC or GND; I O = 0 A; V CC = 6.0 V µa T amb = 40 C to +125 C V IH HIGH-state input voltage V CC = 2.0 V V V CC = 4.5 V V V CC = 6.0 V V V IL LOW-state input voltage V CC = 2.0 V V V CC = 4.5 V V V CC = 6.0 V V V OH HIGH-state output voltage V I =V IH or V IL - I O = 20 µa; V CC = 2.0 V V I O = 20 µa; V CC = 4.5 V V I O = 20 µa; V CC = 6.0 V V I O = 6.0 ma; V CC = 4.5 V V I O = 7.8 ma; V CC = 6.0 V V V OL LOW-state output voltage V I =V IH or V IL - I O =20µA; V CC = 2.0 V V I O =20µA; V CC = 4.5 V V I O =20µA; V CC = 6.0 V V I O = 6.0 ma; V CC = 4.5 V V I O = 7.8 ma; V CC = 6.0 V V I LI input leakage current V I =V CC or GND; V CC = 6.0 V - - ±1.0 µa I OZ OFF-state output current V I =V IH or V IL ; V O =V CC or GND; V CC = 6.0 V - - ±10.0 µa I CC quiescent supply current V I =V CC or GND; I O = 0 A; V CC = 6.0 V µa Table 8: Static characteristics type 74HCT257 At recommended operating conditions; voltages are referenced to GND (ground = 0 V). T amb =25 C V IH HIGH-state input voltage V CC = 4.5 V to 5.5 V V V IL LOW-state input voltage V CC = 4.5 V to 5.5 V V V OH HIGH-state output voltage V I =V IH or V IL ; V CC = 4.5 V I O = 20 µa V I O = 6 ma V Product data sheet 8 of 22

6 Table 8: Static characteristics type 74HCT257 continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). V OL LOW-state output voltage V I =V IH or V IL ; V CC = 4.5 V I O =20µA V I O = 6.0 ma V I LI input leakage current V I =V CC or GND; V CC = 5.5 V - - ±0.1 µa I OZ OFF-state output current V I =V IH or V IL ;V CC = 5.5 V; V O =V CC or GND per input pin; other inputs at V CC or GND; I O =0A - - ±0.5 µa I CC quiescent supply current V I =V CC or GND; I O = 0 A; V CC = 5.5 V µa I CC additional quiescent supply current (per input pin) V I =V CC 2.1 V; other inputs at V CC or GND; V CC = 4.5 V to 5.5 V; I O =0A ni0 input µa ni1 input µa OE input µa S input µa C i input capacitance pf T amb = 40 C to +85 C V IH HIGH-state input voltage V CC = 4.5 V to 5.5 V V V IL LOW-state input voltage V CC = 4.5 V to 5.5 V V V OH HIGH-state output voltage V I =V IH or V IL ; V CC = 4.5 V I O = 20 µa V I O = 6 ma V V OL LOW-state output voltage V I =V IH or V IL ; V CC = 4.5 V I O =20µA V I O = 6.0 ma V I LI input leakage current V I =V CC or GND; V CC = 5.5 V - - ±1.0 µa I OZ OFF-state output current V I =V IH or V IL ;V CC = 5.5 V; V O =V CC or GND - - ±5.0 µa per input pin; other inputs at V CC or GND; I O =0A I CC quiescent supply current V I =V CC or GND; I O = 0 A; V CC = 5.5 V µa I CC additional quiescent supply current (per input pin) V I =V CC 2.1 V; other inputs at V CC or GND; V CC = 4.5 V to 5.5 V; I O =0A ni0 input µa ni1 input µa OE input µa S input µa T amb = 40 C to +125 C V IH HIGH-state input voltage V CC = 4.5 V to 5.5 V V V IL LOW-state input voltage V CC = 4.5 V to 5.5 V V V OH HIGH-state output voltage V I =V IH or V IL ; V CC = 4.5 V I O = 20 µa V I O = 6 ma V Product data sheet 9 of 22

7 Table 8: Static characteristics type 74HCT257 continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). V OL LOW-state output voltage V I =V IH or V IL ; V CC = 4.5 V 11. Dynamic characteristics I O =20µA V I O = 6.0 ma V I LI input leakage current V I =V CC or GND; V CC = 5.5 V - - ±1.0 µa I OZ OFF-state output current V I =V IH or V IL ;V CC = 5.5 V; V O =V CC or GND per input pin; other inputs at V CC or GND; I O =0A - - ±10 µa I CC quiescent supply current V I =V CC or GND; I O = 0 A; V CC = 5.5 V µa I CC additional quiescent supply current (per input pin) V I =V CC 2.1 V; other inputs at V CC or GND; V CC = 4.5 V to 5.5 V; I O =0A ni0 input µa ni1 input µa OE input µa S input µa Table 9: Dynamic characteristics type 74HC257 Voltages are referenced to GND (ground = 0 V); C L = 50 pf, unless otherwise specified. For test circuit see Figure 8. T amb = 25 C t PHL, t PLH propagation delay see Figure 6 nl0 to ny or nl1 to ny V CC = 2.0 V ns V CC = 4.5 V ns V CC = 5.0 V; C L = 15 pf ns V CC = 6.0 V ns propagation delay StonY see Figure 6 V CC = 2.0 V ns V CC = 4.5 V ns V CC = 5.0 V; C L = 15 pf ns V CC = 6.0 V ns t PZH, t PZL 3-state output enable see Figure 7 V CC = 2.0 V ns V CC = 4.5 V ns V CC = 6.0 V ns t PHZ, t PLZ 3-state output disable see Figure 7 V CC = 2.0 V ns V CC = 4.5 V ns V CC = 6.0 V ns Product data sheet 10 of 22

8 Table 9: Dynamic characteristics type 74HC257 continued Voltages are referenced to GND (ground = 0 V); C L = 50 pf, unless otherwise specified. For test circuit see Figure 8. t PZH, t PZL 3-state output enable see Figure 7 V CC = 2.0 V ns V CC = 4.5 V ns V CC = 6.0 V ns t PHZ, t PLZ 3-state output disable see Figure 7 V CC = 2.0 V ns V CC = 4.5 V ns V CC = 6.0 V ns t THL, t TLH output transition time see Figure 6 V CC = 2.0 V ns V CC = 4.5 V ns V CC = 6.0 V ns [1] C PD is used to determine the dynamic power dissipation (P D in µw). P D =C PD V CC 2 f i N+ (C L V CC 2 f o ) where: f i = input frequency in MHz; f o = output frequency in MHz; C L = output load capacitance in pf; V CC = supply voltage in V; N = number of inputs switching; (C L V 2 CC f o ) = sum of outputs. Table 10: Dynamic characteristics type 74HCT257 Voltages are referenced to GND (ground = 0 V); C L = 50 pf, unless otherwise specified. For test circuit see Figure 8. T amb = 25 C t PHL, t PLH propagation delay see Figure 6 nl0 to ny or nl1 to ny V CC = 4.5 V ns V CC = 5.0 V; C L = 15 pf ns propagation delay S to ny see Figure 6 V CC = 4.5 V ns V CC = 5.0 V; C L = 15 pf ns t PZH, t PZL 3-state output enable V CC = 4.5 V; see Figure ns t PHZ, t PLZ 3-state output disable V CC = 4.5 V; see Figure ns t THL, t TLH output transition time V CC = 4.5 V; see Figure ns T amb = 40 C to +85 C t PHL, t PLH propagation delay V CC = 4.5 V; see Figure ns nl0 to ny or nl1 to ny propagation delay S to ny V CC = 4.5 V; see Figure ns Product data sheet 12 of 22

9 Table 10: Dynamic characteristics type 74HCT257 continued Voltages are referenced to GND (ground = 0 V); C L = 50 pf, unless otherwise specified. For test circuit see Figure 8. t PZH, t PZL 3-state output enable V CC = 4.5 V; see Figure ns t PHZ, t PLZ 3-state output disable V CC = 4.5 V; see Figure ns t THL, t TLH output transition time V CC = 4.5 V; see Figure ns T amb = 40 C to +125 C t PHL, t PLH propagation delay V CC = 4.5 V; see Figure ns nl0 to ny or nl1 to ny propagation delay V CC = 4.5 V; see Figure ns S to ny t PZH, t PZL 3-state output enable V CC = 4.5 V; see Figure ns t PHZ, t PLZ 3-state output disable V CC = 4.5 V; see Figure ns t THL, t TLH output transition time V CC = 4.5 V; see Figure ns C PD power dissipation capacitance (per multiplexer) V I = GND to V CC [1] pf [1] C PD is used to determine the dynamic power dissipation (P D in µw). P D =C PD V CC 2 f i N+ (C L V CC 2 f o ) where: f i = input frequency in MHz; f o = output frequency in MHz; C L = output load capacitance in pf; V CC = supply voltage in V; N = number of inputs switching; (C L V 2 CC f o ) = sum of outputs. 12. Waveforms input S, ni0, ni1 V I GND V M V M t PHL t PLH V OH output ny V OL 90 % V M V M 10 % t THL t TLH 001aad477 Fig 6. Measurement points are given in Table 11. V OL and V OH are typical voltage output drop that occur with the output load. Propagation delays input (S, ni0, ni1) to output (ny) and output (ny) transition times Product data sheet 13 of 22

10 13. Package outline DIP16: plastic dual in-line package; 16 leads (300 mil); long body SOT38-1 D M E seating plane A 2 A L A 1 Z 16 e b b 1 9 w M c (e ) 1 M H pin 1 index E mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. A 1 A 2 (1) (1) min. max. b b 1 c D E e e 1 L M E M H Note 1. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included w (1) Z max OUTLINE VERSION SOT38-1 REFERENCES IEC JEDEC JEITA 050G09 MO-001 SC EUROPEAN PROJECTION Fig 9. Package outline SOT38-1 (DIP16) Product data sheet 16 of 22