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HT27LC4096
CMOS 256K16-Bit OTP EPROM
Features
* Operating voltage: +3.3V * Programming voltage - VPP=12.5V0.2V - VCC=6.0V0.2V * 256K16-bits organization * Fast read access time: 90ns * Fast programming algorithm * Programming time 75ms typ. * Two line controls (OE and CE) * Standard product identification code * Commercial temperature range (0C to +70C) * 40-pin plastic DIP package
* High-reliability CMOS technology * Latch-up immunity to 100mA from -1.0V to
VCC+1.0V
* CMOS and TTL compatible I/O * Low power consumption - Active: 15mA max. - Standby: 1mA typ.
44-pin PLCC package
General Description
The HT27LC4096 chip family is a low-power, 4096K (4,194,304) bits, +3.3V electrically one-time programmable (OTP) read-only memories (EPROM). Organized into 256K words with 16 bits per word, it features a fast single address location programming, typically at 75ms per word. Any word can be accessed in less than 90ns with respect to spec. This eliminates the need for WAIT states in high-performance microprocessor systems. The HT27LC4096 has separate Output Enable (OE) and Chip Enable (CE) controls which eliminate bus contention issues.
Block Diagram
Row A d d re s s C o lu m n A d d re s s
X -D e c o d e r
C e ll A r r a y VCC
Y -D e c o d e r
Y - G a tin g
VSS VPP
CE OE
CE & OE & TEST C o n tr o l L o g ic
SA CKT & O u tp u t B u ffe r
DQ 0~DQ 15
Rev. 1.20
1
November 22, 2002
HT27LC4096
Pin Assignment
VPP CE DQ 15 DQ 14 DQ 13 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DQ 12 DQ 11 DQ 10 DQ9 DQ8 VSS DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0 OE 2 1 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 VCC A17 A16 A15 A14 A13 A12 A11 A10 A9 VSS A8 A7 A6 A5 A4 A3 A2 A1 A0 DQ 12 7 8 9 10 11 12 13 14 15 16 17 18 19 DQ3 DQ2 20 21 22 DQ1 DQ0 OE 23 24 25 NC A0 A1 26 A2 27 28 A3 DQ 11 DQ 10 DQ9 DQ8 VSS NC DQ7 DQ6 DQ5 DQ4 6 5 4 3 2 1 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 A13 A12 A11 A10 A9 VSS NC A8 A7 A6 A5 C DQ1 DQ1 DQ1 E 3 4 5 VCC VPP A17 A16 A15 A14 NC
H T27LC 4096 4 4 P L C C -A
A4
H T27LC 4096 4 0 D IP -A
Pin Description
Pin Name VPP CE DQ0~DQ15 VSS OE A0~A17 VCC I/O/P P I I/O 3/4 I I 3/4 Program voltage supply Chip enable Data inputs/outputs Negative power supply, ground Output enable Address inputs Positive power supply Description
Absolute Maximum Rating
Operation Temperature Commercial ............................................................................................................0C to 70C Storage Temperature.............................................................................................................................-65C to 125 C Applied VCC Voltage with Respect to VSS ................................................................................................. -0.6V to 7.0V Applied Voltage on Input Pin with Respect to VSS..................................................................................... -0.6V to 7.0V Applied Voltage on Output Pin with Respect to VSS ......................................................................... -0.6V to VCC+0.5V Applied Voltage on A9 Pin with Respect to VSS ...................................................................................... -0.6V to 13.5V Applied VPP Voltage with Respect to VSS ................................................................................................-0.6V to 13.5V Applied READ Voltage (Functionality is guaranteed between these limits) ................................................+3.0V to 3.6V Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. Rev. 1.20 2 November 22, 2002
HT27LC4096
D.C. Characteristics
Symbol Read operation VOH VOL VIH VIL ILI ILO ICC ISB1 ISB2 IPP Output High Level Output Low Level Input High Level Input Low Level Input Leakage Current Output Leakage Current VCC Active Current Standby Current (CMOS) Standby Current (TTL) VPP Read/Standby Current 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V IOH=-0.4mA IOL=2.1mA 3/4 3/4 VIN=0 to 3.6V VOUT=0 to 3.6V CE=VIL, f=5MHz, IOUT=0mA CE=VCC0.3V CE=VIH CE=OE=VIL, VPP=VCC 2.4 3/4 2 -0.3 -5 -10 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 1 3/4 3/4 3/4 0.45 VCC+0.5 0.8 5 10 15 10 0.6 100 V V V V mA mA mA mA mA mA Parameter Test Conditions VCC Conditions Min. Typ. Max. Unit
Programming operation VOH VOL VIH VIL ILI VH ICC IPP Output High Level Output Low Level Input High Level Input Low Level Input Load Current A9 Product ID Voltage VCC Supply Current VPP Supply Current 6V 6V 6V 6V 6V 6V 6V 6V CE=VIL IOH=-0.4mA IOL=2.1mA 3/4 3/4 VIN=VIL, VIH 3/4 3/4 2.4 3/4 0.7VCC -0.5 3/4 11.5 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 0.45 VCC+0.5 0.8 5 12.5 40 10 V V V V mA V mA mA
Capacitance CIN COUT CVPP Input Capacitance Output Capacitance VPP Capacitance 3.3V 3.3V 3.3V VIN=0V VOUT=0V VPP=0V 3/4 3/4 3/4 8 8 18 12 12 25 pF pF pF
A.C. Characteristics
Symbol Read operation tACC tCE tOE tDF tOH Address to Output Delay Chip Enable to Output Delay Output Enable to Output Delay 3.3V CE=OE=VIL 3.3V OE=VIL 3.3V CE=VIL 3/4 3/4 3/4 3/4 3/4 3/4 0 3/4 3/4 3/4 3/4 3/4 Parameter Test Conditions VCC Conditions Min. Typ.
Ta=+25C5C Max. Unit
90 90 45 40 3/4
ns ns ns ns ns
CE or OE High to Output Float, Whichever 3.3V Occurred First Output Hold from Address, CE or OE, Whichever Occurred First 3.3V
Rev. 1.20
3
November 22, 2002
HT27LC4096
Symbol Programming operation tAS tOES tDS tAH tDH tDFP tVPS tPW tVCS tCES tOE tPRT Address Setup Time OE Setup Time Data Setup Time Address Hold Time Data Hold Time Output Enable to Output Float Delay VPP Setup Time CE Program Pulse Width VCC Setup Time CE Setup Time Data Valid from OE VPP Pulse Rise Time During Programming 6V 6V 6V 6V 6V 6V 6V 6V 6V 6V 6V 6V 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 2 2 2 0 2 0 2 30 2 2 3/4 2 3/4 3/4 3/4 3/4 3/4 3/4 3/4 75 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 130 3/4 105 3/4 3/4 150 3/4 ms ms ms ms ms ns ms ms ms ms ns ms Parameter Test Conditions VCC Conditions Min. Typ. Max. Unit
Test waveforms and measurements
2 .4 V A C D r iv in g L e v e ls 0 .4 5 V 2 .0 V 0 .8 V
Output test load
1 .3 V
AC
M e a s u re m e n t Level
(1 N 9 1 4 )
tR, tF< 20ns (10% to 90%)
C
O u tp u t P in
L
Note: CL=100pF including jig capacitance.
Functional Description
Programming of the HT27LC4096 When the HT27LC4096 is delivered, the chip has all 4096K bits in the ONE, or HIGH state. ZEROs are loaded into the HT27LC4096 through programming. The programming mode is entered when 12.50.2V is applied to the VPP pin, OE is at VIH, and CE is VIL. For programming, the data to be programmed is applied with 16 bits in parallel to the data pins. The programming flowchart in Figure 3 shows the fast interactive programming algorithm. The interactive algorithm reduces programming time by using 30ms to 105ms programming pulses and giving each address only as many pulses as is necessary in order to reliably program the data. After each pulse is applied to a given address, the data in that address is verified. If the data is not verified, additional pulses are given until it is verified or until the maximum number of pulses is reached while sequencing through each address of the HT27LC4096. This process is repeated while seRev. 1.20 4 quencing through each address of the HT27LC4096. This part of the programming algorithm is done at =6.0V to assure that each EPROM bit is programmed to a sufficiently high threshold voltage. This ensures that all bits have sufficient margin. After the final address is completed, the entire EPROM memory is read at VCC=VPP=3.30.3V to verify the entire memory. Program inhibit mode Programming of multiple HT27LC4096 in parallel with different data is also easily accomplished by using the Program Inhibit Mode. Except for CE, all like inputs of the parallel HT27LC4096 may be common. A TTL low-level program pulse applied to an HT27LC4096 CE input with Vpp=12.50.2V, and OE HIGH will program that HT27LC4096. A high-level CE input inhibits the HT27LC4096 from being programmed.
November 22, 2002
HT27LC4096
Program verify mode Verification should be performed on the programmed bits to determine whether they were correctly programmed. The verification should be performed with OE at VIL, and CE at VIH, and VPP at its programming voltage. Auto product identification The Auto Product Identification mode allows the reading out of a binary code from an EPROM that will identify its manufacturer and the type. This mode is intended for programming to automatically match the device to be programmed with its corresponding programming algorithm. This mode is functional in the 25C5C ambient temperature range that is required when programming the HT27LC4096. To activate this mode, the programming equipment must force 12.00.5V on the address line A9 of the HT27LC4096. Two identifier bytes may then be sequenced from the device outputs by toggling address line A0 from VIL to VIH, when A1=VIH. All other address lines must be held at VIH during Auto Product Identification mode. Byte 0 (A0=VIL) represents the manufacturer code, and byte 1 (A0=VIH), the device code. For HT27LC4096, these two identifier bytes are given in the Operation mode truth table. When A1=VIL, the HT27LC4096 will read out the binary code of 7F, continuation code, to signify the unavailability of manufacturer ID codes. Read mode The HT27LC4096 has two control functions, both of which must be logically satisfied in order to obtain data at outputs. Chip Enable (CE) is the power control and should be used for device selection. Output Enable (OE) is the output control and should be used to gate data to the output pins, independent of device selection. Assuming that addresses are stable, address access time (tACC) is equal to the delay from CE to output (tCE). Data is available at the outputs (tOE) after the falling edge of OE, assuming the CE has been LOW and addresses have been stable for at least tACC-tOE. Standby mode The HT27LC4096 has CMOS standby mode which reduces the maximum VCC current to 10mA. It is placed in CMOS standby when CE is at V CC 0.3V. The HT27LC4096 also has a TTL-standby mode which reduces the maximum VCC current to 0.6mA. It is placed in TTL-standby when CE is at VIH. When in standby mode, the outputs are in a high-impedance state, independent of the OE input. Two-line output control function To accommodate multiple memory connections, a two-line control function is provided to allow for:
* Low memory power dissipation * Assurance that output bus contention will not occur
It is recommended that CE be decoded and used as the primary device-selection function, while OE be made a common connection to the READ line from the system control bus. This assures that all deselected memory devices are in their low-power standby mode and that the output pins are only active when data is desired from a particular memory device. System considerations During the switch between active and standby conditions, transient current peaks are produced on the rising and falling edges of Chip Enable. The magnitude of these transient current peaks is dependent on the output capacitance loading of the device. At a minimum, a 0.1mF ceramic capacitor (high frequency, low inherent inductance) should be used on each device between VCC and VPP to minimize transient effects. In addition, to overcome the voltage drop caused by the inductive effects of the printed circuit board traces on EPROM arrays, a 4.7mF bulk electrolytic capacitor should be used between VCC and VPP for each eight devices. The location of the capacitor should be close to where the power supply is connected to the array.
Rev. 1.20
5
November 22, 2002
HT27LC4096
Operation mode truth table All the operation modes are shown in the table following. Mode Read Output Disable Standby (TTL) Standby (CMOS) Program Program Verify Product Inhibit Manufacturer Code (3) Device Type Code (3) Note: (1) VH = 12.0V 0.5V (2) X=Either VIH or VIL (3) For Manufacturer Code and Device Code, A1=VIH, When A1=VIL, both codes will read 7F CE VIL VIL VIH VCC 0.3V VIL X VIH VIL VIL OE VIL VIH X X VIH VIL X VIL VIL A0 X X X X X X X VIL VIH A1 X X X X X X X VIH VIH A9 X X X X X X X VH (1) VH (1) VPP VCC VCC VCC VCC VPP VPP VPP VCC VCC Output Dout High Z High Z High Z DIN DOUT High Z 1C 05
Product Identification Code
Code Manufacturer Device Type Continuation 1 0 0 1 1 1 1 1 1 1 7F Pins A0 0 1 0 A1 1 1 0 DQ7 0 0 0 DQ6 0 0 1 DQ5 0 0 1 DQ4 1 0 1 DQ3 1 0 1 DQ2 1 1 1 DQ1 0 0 1 DQ0 0 1 1 Hex Data 1C 05 7F
A d d re s s CE tC
E
A d d r e s s V a lid
tD
.
OE tA O u tp u t H IG H Z
CC
tO
E
tO
H
O u tp u t V a lid
Figure 1. A.C. waveforms for read operation
Rev. 1.20
6
November 22, 2002
HT27LC4096
P ro g ra m A d d re s s V V V V 6 .0 V 5 .0 V 1 2 .5 V 5 .0 V tP CE V V
IH IL RT IH IL
Read ( V e r ify )
A d d r e s s S ta b le tA
S
tO
E
tA
H
D a ta
IH IL
D a ta In tD
S
D a ta O u t V a lid tD
H
VCC
tD tV tV
CS PS
.P
VPP
tP
W
tO
ES
OE
V V
IH IL
Figure 2. Programming waveforms
Rev. 1.20
7
November 22, 2002
HT27LC4096
START
A d d r e s s = . ir s t L o c a tio n
V
V
CC PP
= 6 .0 V = 1 2 .5 V
X=0
In te r a c tiv e S e c tio n
P ro g ra m
o n e 7 5 m s P u ls e
In c re m e n t X
X=20? No . a il V e r ify W o rd ? P ass In c re m e n t A d d re s s No Last A d d re s s Yes V V e r ify S e c tio n
CC
Yes
. a il
=V
PP
= 3 .3 V
V e r ify A ll W o rd s ? P ass D e v ic e P a s s e d
. a il
D e v ic e . a ile d
N o te : E ith e r 1 0 5 m s o r 3 0 m s p u ls e .
Figure 3. Fast programming flowchart
Rev. 1.20
8
November 22, 2002
HT27LC4096
Package Information
40-pin DIP (600mil) outline dimensions
A 40 B 1 20 21
H C D E . G a I
Symbol A B C D E F G H I a
Dimensions in mil Min. 2045 535 145 125 16 50 3/4 595 635 0 Nom. 3/4 3/4 3/4 3/4 3/4 3/4 100 3/4 3/4 3/4 Max. 2065 555 155 145 20 70 3/4 615 670 15
Rev. 1.20
9
November 22, 2002
HT27LC4096
44-pin PLCC outline dimensions
A 6 7 B 1 44 40 39
D C
17 18 28
29 K E .
a H
J G I
Symbol A B C D E F G H I J K a
Dimensions in mil Min. 680 648 680 648 145 3/4 20 3/4 16 24 8 0 Nom. 3/4 3/4 3/4 3/4 3/4 3/4 3/4 50 3/4 3/4 3/4 3/4 Max. 700 658 700 658 155 190 3/4 3/4 22 32 12 10
Rev. 1.20
10
November 22, 2002
HT27LC4096
Product Tape and Reel Specifications
Reel dimensions
T2 D
A
B
C
T1
PLCC 44 Symbol A B C D T1 T2 Description Reel Outer Diameter Reel Inner Diameter Spindle Hole Diameter Key Slit Width Space Between Flange Reel Thickness Dimensions in mm 3301.0 1000.1 13.0+0.5 -0.2 2.00.5 32.8+0.3 -0.2 38.20.2
Rev. 1.20
11
November 22, 2002
HT27LC4096
Carrier tape dimensions
D
E .
P0
P1
t
W C
B0
D1
P K2 A0
K1
PLCC 44 Symbol W P E F D D1 P0 P1 A0 B0 K1 K2 t C Description Carrier Tape Width Cavity Pitch Perforation Position Cavity to Perforation (Width Direction) Perforation Diameter Cavity Hole Diameter Perforation Pitch Cavity to Perforation (Length Direction) Cavity Length Cavity Width Cavity Depth Cavity Depth Carrier Tape Thickness Cover Tape Width Dimensions in mm 32.00.3 24.00.1 1.750.1 14.20.1 1.5+0.1 2.0 Min. 4.00.1 2.00.1 18.00.1 18.00.1 NA 4.90.1 0.330.05 21.3
Rev. 1.20
12
November 22, 2002
HT27LC4096
Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Sales Office) 11F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan Tel: 886-2-2782-9635 Fax: 886-2-2782-9636 Fax: 886-2-2782-7128 (International sales hotline) Holtek Semiconductor (Shanghai) Inc. 7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China Tel: 021-6485-5560 Fax: 021-6485-0313 http://www.holtek.com.cn Holtek Semiconductor (Hong Kong) Ltd. Block A, 3/F, Tin On Industrial Building, 777-779 Cheung Sha Wan Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Holmate Semiconductor, Inc. 46712 Fremont Blvd., Fremont, CA 94538 Tel: 510-252-9880 Fax: 510-252-9885 http://www.holmate.com Copyright O 2002 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holteks products are not authorized for use as critical components in life support devices or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw.
Rev. 1.20
13
November 22, 2002

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