ADV478_15 datasheet(3/12 Pages) AD

部品番号	ADV478

部品情報	CMOS 80 MHz Monolithic 256 3 24(18) Color Palette RAM-DACs

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ADV478/ADV471

–3–

REV. B

TIMING CHARACTERISTICS1

Parameter KP80 Version

KP66 Version

KP50 Version

KP35 Version

Units

Conditions/Comments

fMAX

80

66

50

35

MHz

Clock Rate

t1

10

ns min

RS0–RS2 Setup Time

t2

10

ns min

RS0–RS2 Hold Time

t3

5555ns min

RD

Asserted to Data Bus Driven

t4

40

ns max

RD

Asserted to Data Valid

t5

20

ns max

RD

Negated to Data Bus 3-Stated

t6

10

ns min

Write Data Setup Time

t7

10

ns min

Write Data Hold Time

t8

50

ns min

RD

, WR Pulse Width Low

t9

6

× t

12

6

× t

12

6

× t

12

6

× t

12

ns min

RD

, WR Pulse Width High

t10

3333ns min

Pixel and Control Setup Time

t11

3333ns min

Pixel and Control Hold Time

t12

12.5

15.3

20

28

ns min

Clock Cycle Time

t13

4567ns min

Clock Pulse Width High Time

t14

4569ns min

Clock Pulse Width Low Time

t15

30

ns max

Analog Output Delay

t16

3333ns typ

Analog Output Rise/Fall Time

t17

4

13

15.3

20

28

ns typ

Analog Output Settling Time

t18

2222ns max

Analog Output Skew

tPD

4

× t

12

4

× t

12

4

× t

12

4

× t

12

ns min

Pipeline Delay

NOTES

1TTL input values are 0 to 3 volts, with input rise/fall times

≤3 ns, measured between the 10% and 90% points. Timing reference points at 50% for inputs and

outputs. Analog output load

≤10 pF, 37.5 Ω. D0–D7 output load ≤50 pF. See timing notes in Figure 2.

2

±5% for 80 MHz and 66 MHz parts; ±5% for 50 MHz and 35 MHz parts.

3Temperature Range (T

MIN to TMAX); 0°C to +70°C.

4Settling time does not include clock and data feedthrough. For this test, the digital inputs have a 1 k

Ω resistor to ground and are driven by 74HC logic.

Specifications subject to change without notice

TIMING DIAGRAMS

Figure 1. MPU Read/Write Timing

Figure 2. Video Input/Output Timing

(VAA

2 = +5 V, SETUP = 8/6 = V

AA, VREF = 1.235 V. RSET = 147

. All Specifications TMIN to TMAX

3.)

OBSOLETE

同様の部品番号 - ADV478_15

メーカー	部品番号	データシート	部品情報
Analog Devices	ADV478KP35	531Kb / 12P	CMOS 80 MHz Monolithic 256 x 24(18) Color Palette RAM-DACs REV. B
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	ADV478KP80	531Kb / 12P	CMOS 80 MHz Monolithic 256 x 24(18) Color Palette RAM-DACs REV. B

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