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MAX6973

16-Output PWM LED Drivers for Message Boards

Maxim Integrated 

16-Output PWM LED Drivers

for Message Boards

ELECTRICAL CHARACTERISTICS (continued)

(VDD = 3.0V to 3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = 3.3V, TA = +85°C.) (Note 1)

PARAMETER

Output Low Voltage MUX_

Open-Circuit Detection

Output Slew Time

Y0–Y7, Z0–Z7

Full-Scale Port Output Current

Y0–Y7, Z0–Z7

Port-to-Port Current Matching

Y0–Y7, Z0–Z7

SYMBOL

CONDITIONS

VOLM

VOCD

ISINK = 40mA

80% to 20%, load = 50pF,

calibration DACs set to 0xFF

ISINKFS

VDD = 3.3V, VO = 1.2V,

TA = +85°C

calibration DACs set to 0xFF TA = TMIN to TMAX

∆ISINK

VDD = 3.3V, VO = 1.2V,

calibration DACs set to 0xFF

ISINK = 55mA (Note 2)

TA = +125°C

(Note 3)

TA = +85°C

TA = -40°C

(Note 3)

MIN

54

52.5

TYP MAX UNITS

0.4

V

200

mV

100 ns

55 56

mA

55 58.0

±0.5 ±1.8

±0.5 ±1.2 %

±0.7 ±2.3

Device-to-Device Current Matching

Y0–Y7, Z0–Z7

∆IAVG

VDD = 3.3V, VO = 1.2V, calibration DACs set to 0xFF,

ISINK = 55mA, TA = +85°C (Note 3)

±1 ±2

%

Half-Scale Port Output Current

Y0–Y7, Z0–Z7

ISINKHS

VDD = 3.3V, VO = 1.2V,

calibration DACs set to 0x80

TA = +85°C

TA = TMIN to TMAX

31.0

30.0

33

33

35.5

36.5

mA

Output Load Regulation

∆IOLR

VDD = 3.3V, VO = 1.2V to

3.0V, calibration DACs set to

0x80, ISINK = 33mA

TA = +85°C

TA = TMIN to TMAX

0.3 1.15

mA/V

1.5

Output Power-Supply Rejection

∆IOPSR

VDD = 3.0 V to 3.6V,

VO = 1.2V, calibration DACs

set to 0x80, ISINK = 33mA

TA = +85°C

TA = TMIN to TMAX

0.6 1.7

mA/V

2.0

TIMING CHARACTERISTICS

(VDD = 3.0V to 3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at 3.3V, TA = +85°C.) (Note 1)

PARAMETER

CLKI_ Input Frequency

CLKI_ Duty Cycle

CLKO_ Output Delay

DIN_ Setup Time

DIN_ Hold Time

DOUT_ Output Delay

LOADO Output Delay

LOADI Setup Time

LOADI Hold Time

Watchdog Period

SYMBOL

fCLKI

CONDITIONS

tPD-CLKO

tSU-DIN

tHD-DIN

tPD-DOUT

tPD-LOADO

tSU-LOADI

tHD-LOADI

When enabled

MIN TYP

40

0.5

5

-3

8

40 125

Note 1: All parameters tested at TA = +85°C. Specifications over temperature are guaranteed by design.

Note 2: Specification limits apply to devices at the same TA for TA = TMIN to TMAX.

Note 3: Guaranteed by design.

MAX

33

60

16

15

18

300

UNITS

MHz

%

ns

ns

ns

ns

ns

ns

ns

ms

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