UPD7225 datasheet(39/52 Pages) NEC

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Data Sheet S14308EJ6V0DS00

µµµµPD7225

AC Characteristics (TA =

−−−−10 to +70 °°°°C, VDD = 5 V ±±±± 10%)

Item

Symbol

Condition

MIN.

TYP.

MAX.

Units

Operating frequency

200

kHz

Oscillation frequency

fOSC

R = 180 k

Ω ± 5%

130

175

kHz

High level clock pulse width

tWHC

CL1, external clock

µs

Low level clock pulse width

tWLC

CL1, external clock

µs

/SCK frequency

tCYK

900

High level /SCK pulse width

tWHK

400

Low level /SCK pulse width

tWLK

400

/BUSY

↑→ /SCK ↓ hold time

tHBK

0ns

SI set time (against /SCK

↑)tSIK

100

SI hold time (against /SCK

↑)tHKI

200

8th pulse of /SCK

↑→ /BUSY ↓

delay time

tDKB

CL = 50 pF

µs

/CS

↓→ /BUSY ↓ delay time

tDCSB

CL = 50 pF

1.5

µs

/BUSY low level time

tWLB

tWHCS

≥ 48/fCNote1 CL = 50 pF

44 (57)

Note 2

1/fC

C, /D set time (against 8th pulse

of SCK

↑)

tSDK

µs

C, /D hold time (against 8th pulse

of SCK

↑)

tHKD

µs

/CS hold time (against 8th pulse of

SCK

↑)

tHKCS

µs

High level /CS pulse width

tWHCS

Note 3

µs

Low level /CS pulse width

tWLCS

Note 3

µs

/SYNC load capacitance

CLSY

tCYC = 5

µs50

Notes 1. UNSYNCHRONIZED TRANSFER MODE

For SYNCHRONIZED TRANSFER MODE,

tWHCS

≥ (48/fC + AC driver frequency)

2. BLINKING ON

3. 8/fc

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