idt49c460cjb Integrated Device Technology, idt49c460cjb Datasheet
idt49c460cjb
Related parts for idt49c460cjb
idt49c460cjb Summary of contents
Page 1
... CORRECT CONTROL LOGIC CODE ID 1,0 DIAG MODE 1,0 The IDT logo is a registered trademark of Integrated Device Technology, Inc. MILITARY AND COMMERCIAL TEMPERATURE RANGES 1995 Integrated Device Technology, Inc. 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT DESCRIPTION: The IDT49C460s are high-speed, low-power, 32-bit Error ...
Page 2
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT PIN CONFIGURATIONS GND ...
Page 3
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT GND ...
Page 4
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT CODE DIAG MODE 0 63 CODE ...
Page 5
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT PIN DESCRIPTIONS Pin Name I/O DATA I/O 32 bidirectional data lines provide input to the Data Input Latch and Diagnostic Latch and also receive output from 0–31 the Data Output Latch. DATA ...
Page 6
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT EDC ARCHITECTURE SUMMARY The IDT49C460s are high-performance cascadable EDCs used for check bit generation, error detection, error correction and diagnostics. The function blocks for this 32-bit device consist of the following: • ...
Page 7
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT DETAILED PRODUCT DESCRIPTION The IDT49C460 EDC units contain the logic necessary to generate check bits on 32 bits of data input according to a modified Hamming Code. The EDC can compare internally ...
Page 8
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT OPERATING MODE SELECTION Tables 2 and 3 describe the nine operating modes of the IDT49C460s. The Diagnostic Mode pins — DIAG MODE — define four basic areas of operation. CORRECT further divide ...
Page 9
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT 32-BIT DATA WORD CONFIGURATION A single IDT49C460 EDC unit, connected as shown in Figure 1, provides all the logic needed for single bit error correction and double bit error detection of a ...
Page 10
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT Hex 0 1 Syndrome Bits Hex ...
Page 11
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT Table 8B. 64-Bit Diagnostic Latch–Coding Format (Diagnostic and Correct Mode) Hex S 7 Syndrome S 6 Bits Hex ...
Page 12
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT 64–Bit Propagation Delay From To DATA Check Bits Out DATA Corrected DATA DATA Syndromes Out ERROR DATA for 64 Bits MULT ERROR DATA Component Delay for IDT49C460 AC Specifications (DATA TO SC) ...
Page 13
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT Generated Check Bits Parity C Even (XOR Even (XOR Odd (XNOR Odd (XNOR Even (XOR Even (XOR Even (XOR) 6 ...
Page 14
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT SC OUTPUTS The tables below indicate how the SC generated in each control mode of various CODE IDs (Internal Control Mode not applicable). CODE ID Generate 00 SC PH0 ...
Page 15
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT DATA CORRECTION The tables below indicate which data output bits are corrected depending upon the syndromes and the CODE ID position. The syndromes that determine data correction 1,0 are, in some cases, ...
Page 16
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT ABSOLUTE MAXIMUM RATINGS Symbol Rating Com'l. V Terminal Voltage –0.5 to TERM with Respect 0.5V CC GND V Power Supply -0.5 to +7.0 CC Voltage T Operating 0 to ...
Page 17
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT DC ELECTRICAL CHARACTERISTICS (Cont’d.) Commercial + 0.2V – 0. Symbol Parameter I Quiescent Power Supply Current ...
Page 18
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT IDT49C460E AC ELECTRICAL CHARACTERISTICS (Guaranteed Commercial Range Performance) Temperature range + The inputs switch between with signal measured at the 1.5V level. (1) PROPAGATION ...
Page 19
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT IDT49C460D AC ELECTRICAL CHARACTERISTICS (Guaranteed Commercial Range Performance) Temperature range + The inputs switch between with signal measured at the 1.5V level. (1) PROPAGATION ...
Page 20
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT IDT49C460D AC ELECTRICAL CHARACTERISTICS (Guaranteed Military Range Performance) Temperature range: – +125 C, V The inputs switch between with signal measured at the 1.5V level. (1) PROPAGATION ...
Page 21
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT IDT49C460C AC ELECTRICAL CHARACTERISTICS (Guaranteed Commercial Range Performance) Temperature range + The inputs switch between with signal measured at the 1.5V level. (1) PROPAGATION ...
Page 22
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT IDT49C460C AC ELECTRICAL CHARACTERISTICS (Guaranteed Military Range Performance) Temperature range: – +125 C, V The inputs switch between with signal measured at the 1.5V level. (1) PROPAGATION ...
Page 23
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT IDT49C460B AC ELECTRICAL CHARACTERISTICS (Guaranteed Commercial Range Performance) Temperature range + The inputs switch between with signal measured at the 1.5V level. (1) PROPAGATION ...
Page 24
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT IDT49C460B AC ELECTRICAL CHARACTERISTICS (Guaranteed Military Range Performance) Temperature range: – +125 C, V The inputs switch between with signal measured at the 1.5V level. (1) PROPAGATION ...
Page 25
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT IDT49C460A AC ELECTRICAL CHARACTERISTICS (Guaranteed Commercial Range Performance) Temperature range The inputs switch between with signal measured at the 1.5V level. (1) PROPAGATION ...
Page 26
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT IDT49C460A AC ELECTRICAL CHARACTERISTICS (Guaranteed Military Range Performance) Temperature range: – +125 C, V The inputs switch between with signal measured at the 1.5V level. (1) PROPAGATION ...
Page 27
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT IDT49C460 AC ELECTRICAL CHARACTERISTICS (Guaranteed Commercial Range Performance) Temperature range + The inputs switch between with signal measured at the 1.5V level. (1) PROPAGATION ...
Page 28
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT IDT49C460 AC ELECTRICAL CHARACTERISTICS (Guaranteed Military Range Performance) Temperature range: – +125 C, V The inputs switch between with signal measured at the 1.5V level. (1) PROPAGATION ...
Page 29
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT DETECT OR CORRECTION MODE (FROM GENERATE MODE) OE byte 0 6 (Output) DATA bus CB IN CORRECT CODE ID1,0 = 00, 11 CODE ID1,0 = 00, 11 CODE ID1 ...
Page 30
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT GENERATE MODE (FROM DETECT OR CORRECTION MODE) OE byte 0 6 DATA Bus (Output) CODE ID 1 GEN LE / OUT (CODE ID 1,0 = 10) ...
Page 31
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT SET-UP AND HOLD TIMES AND MINIMUM PULSE WIDTHS DATA IN CODE ID1,0 = 00, 11 CODE ID1 GEN LE / OUT CORRECT NOTES: 1. BOLD ...
Page 32
IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT TEST LOAD CIRCUIT Pulse Generator DEFINITIONS Load capacitance: includes jig and probe capacitance Termination resistance: should be equal TEST CONDITIONS Input Pulse Levels ...