4
FN6675.1
January 22, 2009
Absolute Maximum Ratings Thermal Information
Supply Voltage V
DD
- V
SS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . +6.0V
Input Voltage (Any Terminal) . . . . . . . . . . V
DD
+ 0.3V to V
SS
- 0.3V
CHARacter Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . 300mA
SEGment Output Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . .-25°C to +85°C
Thermal Resistance (Typical, Note 1) θ
JA
(°C/W)
MQFP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Maximum Storage Temperature Range. . . . . . . . . .-65°C to +150°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTES:
1. θ
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications V
DD
= 5V, V
SS
= 0V, T
A
= +25°C, Unless Otherwise Specified
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS
DC CHARACTERISTICS
Supply Voltage (V
DD
- V
SS
)V
SUPP
4.75 5.0 5.25 V
Operating Supply Current I
DD
V
SUPP
= 5.25V, 10 Segments ON, All 8 Characters - 180 - mA
Quiescent Supply Current I
STBY
V
SUPP
= 5.25V, OSC/OFF Pin < 0.5V, CS = V
SS
- 30 250 µA
Input High Voltage V
IH
2- -V
Input Low Voltage V
IL
--0.8V
Input Current I
IN
-10 - +10 µA
CHARacter Drive Current I
CHAR
V
SUPP
= 5V, V
OUT
= 1V 140 190 - mA
CHARacter Leakage Current I
CHLK
- - 100 µA
SEGment Drive Current I
SEG
V
SUPP
= 5V, V
OUT
= 2.5V 3.3 4.5 5.5 mA
SEGment Leakage Current I
SLK
-0.0110µA
DISPlay FULL Output Low V
OL
I
OL
= 1.6mA - - 0.4 V
DISPlay FULL Output High V
OH
l
IH
= 100µA 2.4 - - V
Display Scan Rate f
DS
- 400 - Hz
Electrical Specifications Drive levels 0.4V and 2.4V, timing measured at 0.8V and 2.0V. V
DD
= 5V, T
A
= +25°C,
Unless Otherwise Specified
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS
AC CHARACTERISTICS
WR
, CLeaR Pulse Width Low t
WPI
300 250 - ns
WR
, CLeaR Pulse Width High (Note 2) t
WPH
- 250 - ns
Data Hold Time t
DH
0 -100 - ns
Data Setup Time t
DS
250 150 - ns
Address Hold Time t
AH
125 - - ns
Address Setup Time t
AS
40 15 - ns
CS Setup Time t
CS
0--ns
Pulse Transition Time t
T
- - 100 ns
SEN Setup Time t
SEN
0-25-ns
Display Full Delay t
WDF
760 540 - ns
Capacitance
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS
Input Capacitance C
lN
(Note 3) - 5 - pF
Output Capacitance C
O
(Note 3) - 5 - pF
2. In Sequential mode WR
high must be T
SEN
+T
WDF
.
3. For design reference only, not tested.
ICM7244ICM7244
5
FN6675.1
January 22, 2009
Timing Waveforms
FIGURE 1. RANDOM ACCESS TIMING
FIGURE 2. SEQUENTIAL ACCESS MODE TIMING (MODE = 1)
FIGURE 3. DISPLAY CHARACTERS MULTIPLEX TIMING DIAGRAM
CS
ADDRESS
WRITE
DATA
VALID
t
CS
t
AH
t
AS
t
T
t
DH
t
T
t
WC
t
WPI
t
WHP
t
DS
VALID
t
WPH
WR
CLEAR
SEN
DISPLAY FULL
CHAR
t
SEN
CHAR
CHAR
t
WDF
12
8
INTERNAL
CHAR 1
CHARACTERS
DRIVE
SIGNALS
~5µs
~300µs
INTER-CHARACTER BLANKING
CHAR 2
CHAR 3
CHAR 4
CHAR 5
CHAR 6
CHAR 7
CHAR 8
INTER-CHARACTER
BLANKING
SIGNAL
ICM7244ICM7244
6
FN6675.1
January 22, 2009
Pin Descriptions
SIGNAL PIN FUNCTION
D0 - D5 4 thru 9 6-Bit ASCll Data input pins (active high).
CS 10 Chip Select from µP address decoder, etc.
WR
13 WRite pulse input pin (active low). For an active high write pulse, CS can be used.
MODE 29 Selects data entry MODE. High selects Sequential Access (SA) mode where first entry is displayed
in “leftmost” character and subsequent entries appear to the “right”. Low selects the Random
Access (RA) mode where data is displayed on the character addressed via A0 thru A2 Address pins.
A0/SEN 28 In RA mode it is the LSB of the character Address. In SA mode it is used for cascading devices for
displays of more than 8 characters (active high enables device controller).
A1/CLR
27 In RA mode this is the second bit of the address. In SA mode, a low input will CLeaR the Serial
Address Counter, the Data Memory and the display.
A2/DISP FULL 26 In RA mode this is the MSB of the Address. In SA mode, the output goes high after 8 entries,
indicating DISPlay FULL.
OSC/OFF
25 OSCillator input pin. Adding capacitance to V
DD
will lower the internal oscillator frequency. An external
oscillator can be applied to this pin. A low at this input sets the device into a (shutdown) mode, shutting
OFF the display and oscillator but retaining data stored in memory.
SEG d1, SEG a1,
SEG a2,
SEG j, SEG h, DP,
SEG d2, SEG f,
SEG i, SEG b, SEG
g2, SEG I,
SEG m, SEG e,
SEG g1, SEG k,
SEG c
1 thru 3,
30 thru 38
40 thru 44
SEGment driver outputs.
CHAR8 thru
CHAR5,
CHAR4 thru
CHAR2,
CHAR1
14 thru 17,
19 thru 21,
24
CHARacter driver outputs.
ICM7244ICM7244

ICM7244AIM44Z

Mfr. #:
Manufacturer:
Renesas / Intersil
Description:
LED Display Drivers W/ANNEAL 8-CHAR UP LED DRVR W/ON
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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