MAX4821EUP+T Maxim Integrated Products, MAX4821EUP+T Datasheet - Page 5

• Manufacturer Part Number: MAX4821EUP+T
• Description: IC RELAY DRIVER 8CHAN 20-TSSOP
• Manufacturer: Maxim Integrated Products
• Type: Relay/Lamp Driverr

Specifications of MAX4821EUP+T

• Input Type: Parallel/Serial
• Number Of Outputs: 8
• On-state Resistance: 2 Ohm
• Current - Output / Channel: 70mA
• Current - Peak Output: 150mA
• Voltage - Supply: 2.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(V
COM
10, 16
THIN
QFN
11
3.3V/+5V, 8-Channel, Cascadable Relay Drivers
1
2
3
4
5
6
7
8
9
MAX4820
= V
CC
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
TSSOP
12, 18
, T
10
11
13
2.3
3
4
5
6
7
8
9
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
2.7
PIN
_______________________________________________________________________________________
INPUT LOGIC THRESHOLD
vs. SUPPLY VOLTAGE
3.1
10, 16
THIN
QFN
SUPPLY VOLTAGE (V)
11
—
—
—
—
1
2
7
8
9
MAX4821
3.5
3.9
TSSOP
12, 18
4.3
10
11
13
—
—
—
—
3
4
9
4.7
5.1
RESET
NAME
DOUT
PGND
SCLK
OUT8
OUT7
OUT6
GND
N.C.
DIN
CS
Typical Operating Characteristics (continued)
5.5
with Serial/Parallel Interface
Reset Input. Drive RESET low to clear all latches and registers (all outputs
are turned off). RESET overrides all other inputs. If RESET and SET are pulled
low at the same time, then RESET takes precedence.
Chip-Select Input.
MAX4820: Drive CS low to select the device. When CS is low, data at DIN is
clocked into the 8-bit shift register on SCLK’s rising edge. Drive CS from low
to high to latch the data to the registers and activate the appropriate relays.
MAX4821: Drive CS low to select the device and set level on LVL. Drive CS
from low to high to latch the address and level data to the output.
Serial-Data Input
Serial-Clock Input
Serial-Data Output. DOUT is the output of the 8-bit shift register. This output
can be used to daisy chain multiple MAX4820s. The data at DOUT appears
synchronous to SCLK’s falling edge.
No Connection
Ground
Open-Drain Output 8. Connect OUT8 to the low side of a relay coil. This
output is pulled to PGND when activated, but otherwise is high impedance.
Open-Drain Output 7. Connect OUT7 to the low side of a relay coil. This
output is pulled to PGND when activated, but otherwise is high impedance.
Power Ground. PGND is a return for the output sinks. Connect PGND pins
together and to GND.
Open-Drain Output 6. Connect OUT6 to the low side of a relay coil. This
output is pulled to PGND when activated, but otherwise is high impedance.
0
0
A
= +25°C.)
FUNCTION
WITH STANDARD 3V RELAY
BACK EMF CLAMPING
OUT_ TURNS OFF
200μs/div
Pin Description
V
CC
MAX4820 toc11
= 3.3V
V
5V/div
OUT_
1V/div
CS
5