7477 datasheet(217/354 Pages) RENESAS

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1.20 Electrical characteristics

7470/7471/7477/7478 GROUP USER’S MANUAL

1.20.2 Timing requirements, switching characteristics

(1) 7470/7471 group timing requirements, switching characteristics

Table 1.20.17 shows the timing requirements and switching characteristics of the 7470/7471 group.

Figure 1.20.1 shows the timing chart.

Table 1.20.17 Timing requirements and switching characteristics (7470/7471 group)

(VCC = 4.0 V to 5.5 V, VSS = 0V, Ta = –20 °C to +85°C, f(XIN) = 4 MHz)

Symbol

tc(CLK)

tWH(CLK)

tWL(CLK)

tsu(SIN–CLK)

th(CLK-SIN)

td(CLK-SOUT)

Parameter

Serial I/O clock input cycle time

Serial I/O clock input “H” pulse width

Serial I/O clock input “L” pulse width

Serial I/O input set up time

Serial I/O input hold time

Serial I/O output delay time

Unit

Limits

Max.

Typ.

Min.

1000

400

200

150

Fig. 1.20.1 Timing chart (7470/7471 group)

0.2VCC

0.8VCC

tc(CLK)

tWL(CLK)

tWH(CLK)

td(CLK-SOUT)

SIN

CLK

SOUT

tsu(SIN-CLK)

th(CLK-SIN)

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