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Delphi Input/Output Device with RAM

The Delphi Input/Output Device with RAM (IOR) is intended for use within systems employing a 6800-style microprocessor. This part adds expansion capability for additional I/O control and a 2K x 8 static RAM. The IOR contains three (3) banks of 8-bit wide programmable port pins directly controlled by the host processor. The RAM is directly accessible through the data pins and addressable via the address lines. In addition, the IOR contains four (4) separate PWM channels individually controlled by the host which can be programmed for varying frequency and duty cycle. The IOR contains special reset logic to allow multiprocessor applications. The IOR contains four open drain outputs that can be used to control external PNP switches. The logic also has a separate "Keep Alive" power supply which allows for a "shutdown" mode on the IC while retaining data stored in RAM.

Features

Three (3) I/O ports (8 bits wide)
Four (4) configurable PWMs
Multi-processor reset capability
"Keep Alive" mode
2K x 8 static RAM

Packaging

Available in 68-pin PLCC

Recommended Operating Conditions

Characteristic	Symbol	Value	Unit
Supply Voltage	Vdd	4.75 to 5.25	V
Operating Temp. Range, Ambient	Ta	-40 to 125	°C

Absolute Maximum Ratings

Characteristic	Symbol	Value	Unit
Supply Voltage	Vdd	-0.5 to 6.0	V
Input Voltage	Vin	-0.5 to Vdd 0.5	V
Storage Temp. Range	Tstg	-65 to 150	°C
Max. Junction Temp.		150	°C

Electrical Performance Characteristics

Characteristics	Symbol	Condition	Min	Max	Typ	Unit
Output Voltage Low	Vol
SOD, CNOP, RST1⁄2		lol = 2.0mA		0.4	0.25	V
Data, Ports, PWM		lol = 1.6mA		0.4	0.25	V
Output Voltage High	Voh
Data, Ports, PWM		loh = -0.8mA	Vdd-0.8		Vdd-0.2	V
CNOP*		loh = -1.0mA	Vdd-0.8		Vdd-0.2	V
Input Voltage Low	Vil
Ports				.55Vdd	.6Vdd	V
CS, RST1⁄2, A0-A10, Data, E, MRST, R⁄W				.3Vdd	.45Vdd	V
Input Voltage High	Vih
Ports			.65Vdd	.6Vdd		V
CS, RST1⁄2, A0-A10, Data, E, MRST, RW			.7Vdd		.5Vdd	V
Operating Supply Current	ldd	MRST* & CS* = OV, E running		40	23	mA
"Keep Alive" Current	lkam	Vdd = OV, VKAM = 5.25V		10	1	µA
Operating Frequency	F		.5	5	4.2	MHz
Data Access Time	Tacc	Output Mode, Load = 100pF		75	15	ns

Delphi Input/Output Device with RAM (48k)