MCP4231T-503E/ST 查看數據表（PDF） - Microchip Technology

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MCP4231T-503E/ST

7/8-Bit Single/Dual SPI Digital POT with Volatile Memory

Microchip Technology 

MCP413X/415X/423X/425X

VIH

82

CS

VIHH

VIL

70

SCK

SDO

71

72

80

MSb

BIT6 - - - - - -1

LSb

VIH

84

83

75, 76

73

77

SDI

MSb IN

BIT6 - - - -1

LSb IN

FIGURE 1-2:

74

SPI Timing Waveform (Mode = 00).

TABLE 1-2: SPI REQUIREMENTS (MODE = 00)

#

Characteristic

Symbol

Min Max Units

Conditions

SCK Input Frequency

70 CS Active (VIL or VIHH) to SCK↑ input

71 SCK input high time

72 SCK input low time

73 Setup time of SDI input to SCK↑ edge

FSCK

—

—

TcsA2scH 60

TscH

45

500

TscL

45

500

TDIV2scH

10

10 MHz VDD = 2.7V to 5.5V

1 MHz VDD = 1.8V to 2.7V

— ns

— ns VDD = 2.7V to 5.5V

— ns VDD = 1.8V to 2.7V

— ns VDD = 2.7V to 5.5V

— ns VDD = 1.8V to 2.7V

— ns

74 Hold time of SDI input from SCK↑ edge

TscH2DIL

20

— ns

77 CS Inactive (VIH) to SDO output hi-impedance TcsH2DOZ

—

50 ns Note 1

80 SDO data output valid after SCK↓ edge

TscL2DOV

—

70 ns VDD = 2.7V to 5.5V

170 ns VDD = 1.8V to 2.7V

82 SDO data output valid after

TssL2doV

—

70 ns

CS Active (VIL or VIHH)

83 CS Inactive (VIH) after SCK↓ edge

TscH2csI

100

— ns VDD = 2.7V to 5.5V

1

ms VDD = 1.8V to 2.7V

84 Hold time of CS Inactive (VIH) to

CS Active (VIL or VIHH)

TcsA2csI

50

— ns

Note 1: This specification by design.

DS22060B-page 12

© 2008 Microchip Technology Inc.

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