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JLC1562B Datasheet PDF : 8 Pages
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JLC1562B
I2C Bus I/O Expander
The JLC1562B facilitates easy I2C Bus expandibility. Multiple
devices (up to 8 on the same I2C Bus) are easily added as each device
has its own selectable 3–bit address. The JLC1562B provides an 8–bit
bidirectional input/output port and 6–bit resolution Digital to Analog
Converter. The device can also be used as an Analog to Digital
Converter with 5 input signal lines each with 6–bit A/D resolution.
The voltage on pins P0–P4 is compared with a controllable threshold
voltage and the results are readable through the I2C Bus.
I2C Bus interface pins SDA, SCL and A0–A2 are; Serial Data,
Serial Clock and Device Address respectively. External interface pins
are P0–P7 and VDAC; I/O Port and D/A output.
Features
• Low Power Dissipation
• I2C–Bus Format (2–wire type; SDA, SCL) Data Transfer
• 6–bit A/D Converter
• Bus Address Selectable (3–bit)
• Address Input pins are pulled up to Vdd with internal resistor
• I/O pins are Open Drain Outputs
• Analog Input through Comparator
• Inputs Protected from External Bus Currents in Power Down mode
Power–On
Reset
P7
SDA
P6
8 Bit
P5
SCL
P4
6 Bit
P3
VDD
Latch
P2
P1
6–Bit
P0
DAC
A0
A1
1/2 VCC
A2
3 Bit Comp.
(C5–C7) A
5 Bit
5 Bit Comp.
(C0–C4) B
NOTE: Internal Power On Reset sets P0 ∼ P7 low, sets VDAC to 1/80 VDD
and selects 1/2 VDD for Comparator “B” threshold.
Figure 1. Block Diagram
http://onsemi.com
PDIP–16
N SUFFIX
CASE 648
MARKING
DIAGRAMS
16
JLC1562BN
AWLYYWW
1
16
EIAJ–16
F SUFFIX
CASE 966
JLC1562B
ALYW
1
A
= Assembly Location
WL or L = Wafer Lot
YY or Y = Year
WW or W = Work Week
PIN ASSIGNMENT
A0 1
A1 2
A2 3
P0 4
P1 5
P2 6
P3 7
VSS 8
16 VDD
15 SDA
14 SCL
13 VDAC
12 P7
11 P6
10 P5
9 P4
A0–A2
P0–P4
P5–P7
SCL
SDA
VDAC
PIN LIST
Chip Address Input
Comparator Input / Open Drain Output
Comparator Input / Open Drain Output
Serial Clock Input
I2C Data Output
DAC Output
ORDERING INFORMATION
Device
Package
Shipping
JLC1562BN
PDIP–16
500 / Unit Pak
JLC1562BF
EIAJ–16
50 Units / Rail
JLC1562BFEL EIAJ–16 2000 Units / Reel
© Semiconductor Components Industries, LLC, 1999
1
March, 2000 – Rev. 1
Publication Order Number:
JLC1562BE/D
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