MAX6850 MAXIM [Maxim Integrated Products], MAX6850 Datasheet - Page 5

• Manufacturer Part Number: MAX6850
• Description: 4-Wire Interfaced, 7-, 14-, and 16-Segment Alphanumeric Vacuum-Fluorescent Display Controller
• Manufacturer: MAXIM [Maxim Integrated Products]

4-Wire Interfaced, 7-, 14-, and 16-Segment Alpha-
(Typical Operating Circuit, V+ = 3.3V, T
numeric Vacuum-Fluorescent Display Controller
PIN
10
11
12
13
14
1
2
3
4
5
6
7
8
9
VFBLANK
VFDOUT
VFLOAD
PHASE1
PHASE2
VFCLK
PORT0
PORT1
NAME
PUMP
SCLK
GND
DIN
CS
V+
_______________________________________________________________________________________
2.5
2.0
1.5
1.0
0.5
0
-40
-25
Serial-Clock Output to External Driver. Push-pull clock output to external display driver. On VFCLK’s
falling edge, data is clocked out of VFDOUT.
Serial-Data Output to External Driver. Push-pull data output to external display driver.
Serial-Load Output to External Driver. Push-pull load output to external display driver. Rising edge is
used by external display driver to load serial data into display latch.
Display Blanking Output to External Driver. Push-pull blanking output to external display driver used for
PWM intensity control.
Charge-Pump Output and General-Purpose Output. User-configurable push-pull logic output can also
be used as a driver for external charge pump.
Filament Drive PHASE1 Output and General-Purpose Output. User-configurable push-pull logic output
can also be used as a driver for external filament bridge drive.
Filament Drive PHASE2 Output and General-Purpose Output. User-configurable push-pull logic output
can also be used as a driver for external filament bridge drive.
Positive Supply Voltage. Bypass V+ to GND with a 0.1µF ceramic capacitor.
Ground
PORT0 General-Purpose Output. User-configurable push-pull logic output.
Serial-Clock Input. On SCLK’s rising edge, data shifts into the internal shift register, and data is
clocked out of DOUT. SCLK is active only while CS is low.
Serial-Data Input. Data from DIN loads into the internal 16-bit shift register on SCLK’s rising edge.
Chip-Select Input. Serial data is loaded into the shift register while CS is low. The most recent 16 bits of
data latch on CS’s rising edge.
PORT1 General-Purpose Output. User-configurable push-pull logic output.
-10
f
OSC
5
TEMPERATURE (°C)
vs. TEMPERATURE
20
A
= +25°C, unless otherwise noted.)
35
50
65
Typical Operating Characteristics (continued)
80
V+ = 3.6V
V+ = 2.7V
V+ = 3.3V
95
110
125
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0
-40
FUNCTION
-25
DEAD-CLOCK OSC FREQUENCY
-10
vs. TEMPERATURE
5
V+ = 3.3V
TEMPERATURE (°C)
20
35
50
65
V+ = 2.7V
80
V+ = 3.6V
95
110
125
Pin Description
5